Mechanics and Thermal Physics

Temperature and Thermal Expansion - Meaning of temperature

By the end of the lesson, the learner should be able to:

- Define temperature as a measure of degree of hotness or coldness
- Identify the SI unit of temperature and other units
- Relate temperature measurement to everyday activities like cooking and weather forecasting

- Discuss with peers the meaning of temperature
- Carry out activities to demonstrate hotness and coldness using water at different temperatures
- Use digital resources to search for temperature units and conversion formulas

How do we measure the degree of hotness or coldness of a body?

- Spotlight Physics Learner's Book pg. 56
- Bowls of water at different temperatures
- Digital resources

- Oral questions - Observation - Written assignments

Mechanics and Thermal Physics

Temperature and Thermal Expansion - Temperature conversion
Temperature and Thermal Expansion - Liquid-in-glass thermometers
Temperature and Thermal Expansion - Clinical thermometer
Temperature and Thermal Expansion - Thermocouple thermometer

By the end of the lesson, the learner should be able to:

- Convert temperature from Celsius to Kelvin and vice versa
- Convert temperature from Celsius to Fahrenheit and vice versa
- Connect temperature conversions to international weather reports and scientific research

- Discuss conversion formulas for temperature
- Solve numerical problems on temperature conversion
- Use digital resources to verify temperature conversions

Why is it important to convert temperature between different scales?

- Spotlight Physics Learner's Book pg. 56
- Scientific calculators
- Digital resources
- Spotlight Physics Learner's Book pg. 57
- Alcohol-in-glass thermometer
- Beakers with water
- Heat source
- Spotlight Physics Learner's Book pg. 59
- Clinical thermometer
- Antiseptic
- Cotton wool
- Spotlight Physics Learner's Book pg. 60
- Thermocouple with voltmeter
- Heat source
- Melting ice

- Written tests - Oral questions - Problem-solving exercises

Mechanics and Thermal Physics

Temperature and Thermal Expansion - RTDs and thermistors
Temperature and Thermal Expansion - Infrared and bimetallic thermometers
Temperature and Thermal Expansion - Expansion in solids
Temperature and Thermal Expansion - Linear expansivity

By the end of the lesson, the learner should be able to:

- Explain how resistance changes with temperature in RTDs
- Differentiate between RTDs and thermistors
- Connect RTDs and thermistors to modern digital thermometers and electronic devices

- Use digital resources to search for information on RTDs and thermistors
- Compare RTD and thermistor thermometers
- Discuss applications in modern electronics

How does electrical resistance help in measuring temperature?

- Spotlight Physics Learner's Book pg. 61
- Digital thermometer
- Digital resources
- Reference books
- Spotlight Physics Learner's Book pg. 60
- Infrared thermometer
- Bimetallic thermometer
- Various surfaces
- Spotlight Physics Learner's Book pg. 64
- Ball and ring apparatus
- Heat source
- Safety equipment
- Spotlight Physics Learner's Book pg. 65
- Metal rods (iron, copper, aluminium)
- Ruler/measuring tape

- Oral questions - Written assignments - Group presentations

Mechanics and Thermal Physics

Temperature and Thermal Expansion - Expansion in liquids
Temperature and Thermal Expansion - Anomalous expansion of water
Temperature and Thermal Expansion - Applications in daily life
Moments and Equilibrium - Centre of gravity of regular objects

By the end of the lesson, the learner should be able to:

- Demonstrate thermal expansion in liquids
- Explain why the liquid level first falls then rises when heated
- Connect liquid expansion to the working of liquid-in-glass thermometers

- Explain the anomalous expansion of water between 0°C and 4°C
- Describe why ice floats on water
- Connect anomalous expansion to survival of aquatic life in frozen lakes during winter

- Set up apparatus with flask, tube and coloured water
- Heat the flask and observe liquid level changes
- Discuss why flask expands before liquid
- Use digital resources to research anomalous expansion of water
- Discuss the density-temperature graph of water
- Explain formation of ice on water surfaces

Why does the liquid level initially fall before rising when heated?
Why does ice float on water?

- Spotlight Physics Learner's Book pg. 67
- Round-bottomed flask
- Narrow tube with cork
- Coloured water
- Heat source
- Spotlight Physics Learner's Book pg. 68
- Digital resources
- Charts showing density vs temperature
- Reference books
- Spotlight Physics Learner's Book pg. 71
- Pictures of expansion joints
- Bimetallic strip
- Digital resources
- Spotlight Physics Learner's Book pg. 78
- Cut-out shapes (square, rectangle, circle)
- Pencil for balancing
- Ruler

- Practical assessment - Observation - Oral questions
- Oral questions - Written assignments - Group discussions

Mechanics and Thermal Physics

Moments and Equilibrium - Centre of gravity of triangles
Moments and Equilibrium - Centre of gravity of irregular objects
Moments and Equilibrium - Stable equilibrium
Moments and Equilibrium - Unstable and neutral equilibrium

By the end of the lesson, the learner should be able to:

- Determine C.O.G of triangular objects using medians
- Locate C.O.G at intersection of medians
- Apply knowledge of C.O.G to understanding stability of triangular structures

- Cut out triangular shapes from cardboard
- Construct medians and mark intersection point
- Verify C.O.G by balancing on pencil tip

How do we find the centre of gravity of a triangle?

- Spotlight Physics Learner's Book pg. 80
- Triangular cut-outs
- Ruler
- Pencil
- Marker
- Spotlight Physics Learner's Book pg. 81
- Irregular cardboard shapes
- String and small weight (plumb line)
- Stand and clamp
- Spotlight Physics Learner's Book pg. 83
- Cone-shaped objects
- Flat surface
- Spotlight Physics Learner's Book pg. 84
- Spherical ball

- Practical assessment - Written questions - Observation

Mechanics and Thermal Physics

Moments and Equilibrium - Factors affecting stability
Moments and Equilibrium - Turning effect of a force
Moments and Equilibrium - Calculating moments

By the end of the lesson, the learner should be able to:

- Investigate effect of base area on stability
- Investigate effect of position of C.O.G on stability
- Connect stability factors to why buses have luggage compartments underneath

- Compare stability of bottles with different amounts of sand
- Compare stability of books resting on different surfaces
- Discuss how to increase stability of objects

How does the position of centre of gravity affect stability?

- Spotlight Physics Learner's Book pg. 85
- Plastic bottles
- Sand
- Similar books
- Spotlight Physics Learner's Book pg. 89
- Door
- Spring balance
- Ruler
- Spotlight Physics Learner's Book pg. 90
- Ruler on pivot
- Known weights
- Metre rule

- Practical assessment - Oral questions - Written tests

Mechanics and Thermal Physics

Moments and Equilibrium - Verifying principle of moments
Moments and Equilibrium - Applications of principle of moments

By the end of the lesson, the learner should be able to:

- State the principle of moments
- Verify principle of moments experimentally
- Connect principle of moments to balancing on see-saws

- Set up metre rule on pivot with weights on both sides
- Adjust positions until balanced
- Calculate and compare clockwise and anticlockwise moments

When is a body in rotational equilibrium?

- Spotlight Physics Learner's Book pg. 91
- Metre rule
- Knife edge pivot
- Known masses
- String
- Spotlight Physics Learner's Book pg. 92
- Scientific calculators
- Problem sheets
- Beam balance

- Practical assessment - Written tests - Observation

Mechanics and Thermal Physics

Moments and Equilibrium - Determining mass using moments
Moments and Equilibrium - Parallel forces and two supports
Moments and Equilibrium - Couple and torque
Moments and Equilibrium - Applications and resolution of forces
Energy, Work, Power and Machines - Definition of work

By the end of the lesson, the learner should be able to:

- Determine mass of a metre rule using principle of moments
- Locate C.O.G of a metre rule experimentally
- Apply the method to weighing objects using simple beam balances

- Define a couple as two equal and opposite parallel forces
- Calculate torque as Force × perpendicular distance between forces
- Connect couples to turning steering wheels and opening bottle caps

- Suspend metre rule and find balance point
- Use known mass to determine mass of rule
- Apply principle of moments in calculations
- Demonstrate couple using a plank fixed at centre
- Apply equal forces in opposite directions
- Calculate torque from experimental data

How can we determine the mass of a ruler using moments?
Why do we need two hands to turn a steering wheel smoothly?

- Spotlight Physics Learner's Book pg. 93
- Metre rule
- Stand and thread
- Known masses (50g, 100g)
- Spotlight Physics Learner's Book pg. 94
- Two spring balances
- Known weights
- Stand
- Spotlight Physics Learner's Book pg. 97
- Uniform plank with central pivot
- Spring balances
- Steering wheel model
- Spotlight Physics Learner's Book pg. 100
- Pictures of applications
- Digital resources
- Problem sheets
- Spotlight Physics Learner's Book pg. 105
- Spring balance
- Metre rule
- Various objects

- Practical assessment - Written tests - Problem-solving
- Practical assessment - Written tests - Oral questions

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Calculating work done
Energy, Work, Power and Machines - Energy and its forms
Energy, Work, Power and Machines - Definition and calculation of power

By the end of the lesson, the learner should be able to:

- Calculate work done using W = F × d
- Measure work done experimentally
- Apply work calculations to lifting luggage, climbing stairs and pulling carts

- Measure force and distance to calculate work done
- Solve numerical problems on work
- Discuss work done against gravity and friction

How much work is done when lifting a 10 kg mass through 2 metres?

- Spotlight Physics Learner's Book pg. 107
- Spring balance
- Known masses
- Metre rule
- Stopwatch
- Spotlight Physics Learner's Book pg. 108
- Various objects
- Pictures of energy sources
- Digital resources
- Stopwatch
- Calculators

- Practical assessment - Written tests - Problem-solving

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Kinetic energy
Energy, Work, Power and Machines - Gravitational potential energy
Energy, Work, Power and Machines - Elastic potential energy
Energy, Work, Power and Machines - Conservation of mechanical energy

By the end of the lesson, the learner should be able to:

- Define kinetic energy as energy due to motion
- Calculate kinetic energy using KE = ½mv²
- Connect kinetic energy to moving vehicles, athletes and flowing water

- Roll toy car down ramp and calculate its kinetic energy
- Investigate how mass and velocity affect K.E
- Solve problems on kinetic energy

How does speed affect the kinetic energy of a moving object?

- Spotlight Physics Learner's Book pg. 112
- Toy car
- Ramp
- Stopwatch
- Measuring tape
- Beam balance
- Spotlight Physics Learner's Book pg. 114
- Small weights
- Metre rule
- Beam balance
- Stand
- Spotlight Physics Learner's Book pg. 116
- Rubber bands
- Springs
- Small objects
- Paper balls
- Spotlight Physics Learner's Book pg. 118
- Pendulum bob
- String
- Stand
- Metre rule

- Practical assessment - Written tests - Problem-solving

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Energy transformations
Energy, Work, Power and Machines - Types of simple machines

By the end of the lesson, the learner should be able to:

- Describe energy transformations in various systems
- Apply conservation of energy to solve problems
- Connect energy transformations to motor vehicles, power stations and home appliances

- Discuss energy changes in falling objects, vehicles, and appliances
- Visit a garage to observe energy transformations in vehicles
- Solve problems using conservation of energy

How is energy transformed in a moving vehicle?

- Spotlight Physics Learner's Book pg. 121
- Digital resources
- Pictures of machines
- Reference books
- Spotlight Physics Learner's Book pg. 124
- Pictures of simple machines
- Examples of levers
- Inclined plane model

- Written tests - Oral questions - Project work

Mechanics and Thermal Physics

Energy, Work, Power and Machines - MA, VR and efficiency
Energy, Work, Power and Machines - Levers
Energy, Work, Power and Machines - Pulleys
Energy, Work, Power and Machines - Inclined plane and screw

By the end of the lesson, the learner should be able to:

- Define mechanical advantage, velocity ratio and efficiency
- Calculate MA, VR and efficiency of machines
- Explain why efficiency is always less than 100% due to friction in real machines

- Calculate VR of pulley systems
- Investigate efficiency of pulley systems
- Connect pulley systems to cranes, flagpoles and construction hoists

- Discuss meaning of MA, VR and efficiency
- Calculate MA and VR from experimental data
- Relate efficiency to energy losses
- Set up single fixed and movable pulleys
- Set up block and tackle system
- Calculate MA, VR and efficiency experimentally

Why is the efficiency of machines always less than 100%?
How does the number of pulleys affect the velocity ratio?

- Spotlight Physics Learner's Book pg. 129
- Simple machines
- Spring balance
- Known masses
- Metre rule
- Spotlight Physics Learner's Book pg. 131
- Lever apparatus
- Spotlight Physics Learner's Book pg. 131
- Pulleys
- String
- Known masses
- Spring balance
- Stand
- Spotlight Physics Learner's Book pg. 134
- Inclined plane
- Screw jack
- Metre rule

- Written tests - Problem-solving - Practical assessment
- Practical assessment - Written tests - Observation

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Wheel and axle, gears
Energy, Work, Power and Machines - Hydraulic machines and applications

By the end of the lesson, the learner should be able to:

- Calculate VR of wheel and axle
- Calculate VR of gear systems
- Connect wheel and axle to steering wheels and door knobs, and gears to bicycles and car gearboxes

- Demonstrate wheel and axle operation
- Calculate VR of gear systems with different teeth
- Solve problems on wheel and axle and gears

How do gears change speed and force?

- Spotlight Physics Learner's Book pg. 137
- Wheel and axle model
- Gear wheels
- Bicycle
- Spotlight Physics Learner's Book pg. 139
- Syringes of different sizes
- Tubing
- Water
- Pictures of hydraulic machines

- Practical assessment - Written tests - Oral questions

Waves and Optics

Properties of Waves - Rectilinear propagation of waves
Properties of Waves - Reflection of waves
Properties of Waves - Refraction of waves

By the end of the lesson, the learner should be able to:

- Explain the meaning of rectilinear propagation of waves
- Demonstrate rectilinear propagation using sound and light examples
- Relate wave propagation to everyday experiences like torch beams and speaker systems

- Discuss with peers the meaning of rectilinear propagation of waves
- Observe how sound travels from a teacher facing different directions
- Use digital resources to search for applications of rectilinear propagation

How do waves travel from their source?

- Spotlight Physics Grade 10 pg. 147
- Torch
- Digital resources
- Spotlight Physics Grade 10 pg. 148
- Digital resources
- Charts showing reflection
- Spotlight Physics Grade 10 pg. 150
- Glass of water
- Straight object

- Oral questions - Observation - Written assignments

Waves and Optics

Properties of Waves - Diffraction of waves
Properties of Waves - Interference of waves
Properties of Waves - Demonstrating rectilinear propagation using ripple tank
Properties of Waves - Demonstrating reflection using ripple tank

By the end of the lesson, the learner should be able to:

- Explain the meaning of diffraction of waves
- Demonstrate diffraction using a torch and cone-shaped speaker
- Connect diffraction to how we hear sound around corners and obstacles

- Flash a torch at night towards a wall and observe light spreading
- Use a cone-shaped manila paper as a speaker to demonstrate sound diffraction
- Discuss how sound waves bend around obstacles

How can we hear sound around corners?

- Spotlight Physics Grade 10 pg. 151
- Torch
- Manila paper
- Digital resources
- Spotlight Physics Grade 10 pg. 152
- Two identical speakers
- Audio frequency generator
- Spotlight Physics Grade 10 pg. 154
- Ripple tank and accessories
- Dry cell and cell holder
- White manila paper
- Spotlight Physics Grade 10 pg. 156
- Ripple tank
- Straight metal reflector
- Concave and convex reflectors

- Oral questions - Observation - Practical demonstration

Waves and Optics

Properties of Waves - Demonstrating refraction using ripple tank
Properties of Waves - Demonstrating diffraction using ripple tank
Properties of Waves - Demonstrating interference using ripple tank
Properties of Waves - Production of frequency modulated (FM) waves

By the end of the lesson, the learner should be able to:

- Demonstrate refraction of waves using a ripple tank
- Observe changes in wavelength as waves move from deep to shallow water
- Connect wave refraction to how light bends when entering water

- Explain the meaning of frequency modulation
- Describe methods of producing FM waves
- Connect FM to how radio stations broadcast music and news

- Create a shallow region in the ripple tank using a transparent glass plate
- Produce straight plane waves and observe separation of ripples
- Tilt the glass plate at an acute angle and observe wave bending

- Use digital devices to research the meaning of FM and its production
- Discuss the difference between FM and AM
- Search for applications of frequency modulation

Why does the wavelength change when waves move from deep to shallow water?
How are FM radio signals produced?

- Spotlight Physics Grade 10 pg. 158
- Ripple tank
- Transparent glass plate
- White manila paper
- Spotlight Physics Grade 10 pg. 159
- Two straight metal barriers
- Opaque obstacle
- Spotlight Physics Grade 10 pg. 160
- Two spherical balls

- Spotlight Physics Grade 10 pg. 161
- Digital resources
- Physics reference books

- Practical assessment - Observation - Oral questions
- Oral questions - Written assignments - Group presentations

Waves and Optics

Properties of Waves - Detection of frequency modulated (FM) waves
Properties of Waves - Formation of stationary waves

By the end of the lesson, the learner should be able to:

- Explain how FM waves are detected and demodulated
- Describe applications of FM in various fields
- Relate FM detection to how radios and television sets receive signals

- Discuss demodulation methods for FM signals
- Research applications of FM in radar systems, medical imaging, and telemetry
- Present findings on FM applications to classmates

How do radios detect and convert FM signals to sound?

- Spotlight Physics Grade 10 pg. 162
- Digital resources
- Radio receiver (demonstration)
- Spotlight Physics Grade 10 pg. 163
- Tuning fork
- String
- Mass (weight)
- Fixed pulley system

- Oral questions - Written tests - Research presentations

Waves and Optics

Properties of Waves - Factors affecting fundamental frequency of vibrating string
Properties of Waves - Modes of vibration in strings

By the end of the lesson, the learner should be able to:

- Investigate factors affecting fundamental frequency of a vibrating string
- Determine the relationship between frequency, tension, and length
- Relate findings to tuning musical instruments like guitars and violins

- Set up a sonometer apparatus and vary tension while keeping length constant
- Vary the length between bridges while keeping tension constant
- Discuss the mathematical relationship f = (1/2L)√(T/μ)

How do tension and length affect the frequency of a vibrating string?

- Spotlight Physics Grade 10 pg. 164
- Sonometer apparatus
- Weights
- Two wooden wedges
- Spotlight Physics Grade 10 pg. 166
- Digital resources
- Charts showing modes of vibration

- Practical assessment - Written tests - Oral questions

Waves and Optics

Properties of Waves - Stationary waves in closed pipes
Properties of Waves - Harmonics in closed pipes

By the end of the lesson, the learner should be able to:

- Investigate variation of sound with length of air column in a closed pipe
- Demonstrate resonance in a closed pipe
- Relate closed pipe resonance to how wind instruments like clarinets work

- Dip a glass tube into water and hold a vibrating tuning fork over the open end
- Adjust the tube length until resonance is achieved
- Discuss the relationship between length and wavelength: L = λ/4

How does the length of a closed air column affect the sound produced?

- Spotlight Physics Grade 10 pg. 167
- Glass tube
- Glass jar with water
- Tuning fork
- Spotlight Physics Grade 10 pg. 168
- Digital resources
- Charts showing harmonics

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Stationary waves in open pipes
Properties of Waves - Meaning of Doppler effect
Properties of Waves - Demonstrating Doppler effect
Properties of Waves - Applications of Doppler effect

By the end of the lesson, the learner should be able to:

- Explain stationary wave formation in open pipes
- Calculate fundamental frequency and overtones in open pipes
- Relate open pipe resonance to how flutes and organ pipes produce sound

- Demonstrate Doppler effect using sound sources and ropes
- Observe changes in wavelength when source moves towards or away from observer
- Relate the demonstration to how radar speed guns measure vehicle speed

- Discuss how antinodes form at both ends of an open pipe
- Calculate wavelength and frequency relationships: L = λ/2
- Compare fundamental frequencies in open and closed pipes

- Move an audio frequency generator towards and away from a stationary observer
- Use a rope to show compression and stretching of waves
- Discuss how wavelength decreases when source approaches and increases when receding

How do stationary waves form in open pipes?
How does the movement of a sound source affect the waves detected by an observer?

- Spotlight Physics Grade 10 pg. 169
- Digital resources
- Charts showing open pipe harmonics
- Spotlight Physics Grade 10 pg. 173
- Audio recordings of approaching vehicles
- Spotlight Physics Grade 10 pg. 174
- Audio frequency generator
- Rope or spiral spring
- Spotlight Physics Grade 10 pg. 175
- Digital resources
- Charts showing Doppler applications

- Written tests - Oral questions - Problem-solving exercises
- Practical assessment - Observation - Oral questions

Waves and Optics

Radioactivity - Meaning of radioactivity and related terms
Radioactivity - Stability of isotopes and atomic structure

By the end of the lesson, the learner should be able to:

- Explain the meaning of radioactivity and related terms
- Define nuclear stability, half-life, nuclide, and radioisotope
- Relate radioactivity to smoke detectors and medical treatments

- Use digital resources to search for meanings of radioactivity terms
- Discuss the meaning of radioactive decay, background radiation, and nucleotide
- Share findings with classmates for peer review

What is radioactivity and why do some atoms decay?

- Spotlight Physics Grade 10 pg. 178
- Digital resources
- Physics reference books
- Spotlight Physics Grade 10 pg. 180
- Charts showing atomic structure

- Oral questions - Written assignments - Group discussions

Waves and Optics

Radioactivity - Types of radiations (alpha, beta, gamma)

By the end of the lesson, the learner should be able to:

- Identify the three types of radioactive radiations
- Describe the nature and charge of alpha, beta, and gamma radiations
- Relate radiation types to their uses in cancer treatment and sterilization

- Discuss the composition of alpha particles (helium nucleus)
- Explain beta particles as high-energy electrons
- Describe gamma rays as electromagnetic radiation

What are the different types of radioactive emissions?

- Spotlight Physics Grade 10 pg. 181
- Digital resources
- Charts showing radiation types

- Oral questions - Written tests - Chart interpretation

Waves and Optics

Radioactivity - Properties of alpha and beta particles
Radioactivity - Properties of gamma rays and comparison of radiations

By the end of the lesson, the learner should be able to:

- Describe properties of alpha and beta particles
- Compare penetrating power, ionizing ability, and speed of alpha and beta particles
- Connect alpha radiation properties to smoke detector operation

- Discuss penetrating power: alpha stopped by paper, beta by aluminium
- Compare ionizing power: alpha highest, beta moderate
- Explain deflection in electric and magnetic fields

Why are alpha particles more ionizing but less penetrating than beta particles?

- Spotlight Physics Grade 10 pg. 182
- Digital resources
- Charts comparing radiation properties
- Spotlight Physics Grade 10 pg. 183
- Charts and diagrams

- Written tests - Oral questions - Comparison tables

Waves and Optics

Radioactivity - Alpha decay and nuclear equations
Radioactivity - Beta decay and gamma decay equations
Radioactivity - Uranium-238 decay series
Radioactivity - Detection using electroscope and GM tube

By the end of the lesson, the learner should be able to:

- Write nuclear equations for alpha decay
- Balance nuclear equations showing conservation of mass and charge
- Connect alpha decay to how smoke detectors use americium-241

- Trace the uranium-238 natural decay series
- Write nuclear equations for chain decay reactions
- Connect decay series to geological dating of rocks

- Discuss how alpha emission reduces nucleon number by 4 and proton number by 2
- Write nuclear equation for radium-226 decaying to radon-222
- Practice balancing nuclear equations

- Study the uranium-238 decay chain from U-238 to stable Pb-206
- Identify types of radiations emitted at each stage
- Write nuclear equations for each step in the decay series

How do we write nuclear equations for alpha decay?
How does uranium-238 eventually become stable lead-206?

- Spotlight Physics Grade 10 pg. 186
- Digital resources
- Periodic table
- Spotlight Physics Grade 10 pg. 187
- Spotlight Physics Grade 10 pg. 188
- Charts showing decay series
- Digital resources
- Spotlight Physics Grade 10 pg. 189
- Electroscope
- Diagrams of GM tube

- Written tests - Problem-solving exercises - Oral questions
- Chart interpretation - Written tests - Oral questions

Waves and Optics

Radioactivity - Cloud chambers and nuclear emulsion plates
Radioactivity - Meaning and demonstration of half-life

By the end of the lesson, the learner should be able to:

- Describe detection using expansion and diffusion cloud chambers
- Explain the use of nuclear emulsion plates
- Relate cloud chamber tracks to identifying different radiation types

- Discuss the operation of expansion and diffusion cloud chambers
- Observe track patterns for alpha, beta, and gamma radiations
- Explain how nuclear emulsion plates record particle tracks

How do cloud chambers make radiation tracks visible?

- Spotlight Physics Grade 10 pg. 190
- Diagrams of cloud chambers
- Digital resources
- Spotlight Physics Grade 10 pg. 193
- Burette
- Retort stand
- Stop clock

- Diagram interpretation - Written tests - Oral questions

Waves and Optics

Radioactivity - Calculating half-life using graphs and formula
Radioactivity - Significance and applications of half-life

By the end of the lesson, the learner should be able to:

- Calculate half-life from decay curves
- Apply the half-life formula N = N₀(½)^(T/t)
- Connect half-life calculations to determining age of archaeological samples

- Plot decay curves from given data and determine half-life
- Derive and apply the formula N = N₀(½)^(T/t)
- Solve numerical problems involving half-life calculations

How do we calculate the half-life of a radioactive substance?

- Spotlight Physics Grade 10 pg. 195
- Graph paper
- Scientific calculators
- Spotlight Physics Grade 10 pg. 197
- Digital resources
- Physics reference books

- Written tests - Problem-solving exercises - Graph interpretation

Waves and Optics

Radioactivity - Nuclear fission and chain reactions

By the end of the lesson, the learner should be able to:

- Explain the meaning of nuclear fission
- Describe chain reactions in nuclear fission
- Relate nuclear fission to electricity generation in nuclear power plants

- Discuss how uranium-235 splits when bombarded with neutrons
- Explain how chain reactions release enormous energy
- Differentiate controlled reactions in reactors from uncontrolled reactions in bombs

How do nuclear power plants generate electricity from fission?

- Spotlight Physics Grade 10 pg. 198
- Diagrams of chain reactions
- Digital resources

- Written tests - Diagram interpretation - Oral questions

Waves and Optics
Waves and Optics
Electricity and Magnetism

Radioactivity - Nuclear fusion and applications
Radioactivity - Applications in medicine and industry
Radioactivity - Applications in agriculture and archaeology
Radioactivity - Hazards of radiation and safety precautions
Origin of charges in a material

By the end of the lesson, the learner should be able to:

- Explain the meaning of nuclear fusion
- Compare nuclear fusion with fission
- Relate fusion to how the sun and stars produce energy

- Describe applications of radioactivity in agriculture and archaeology
- Explain carbon dating principles
- Relate radioactive tracers to studying plant fertilizer absorption

- Discuss how light nuclei combine to form heavier nuclei
- Explain why fusion requires extremely high temperatures
- Compare energy released in fusion versus fission reactions

- Discuss carbon dating for determining age of fossils and artifacts
- Explain use of radioactive tracers in agriculture
- Calculate ages using carbon-14 decay principles

Why does nuclear fusion power the sun and stars?
How do scientists use carbon dating to determine the age of fossils?

- Spotlight Physics Grade 10 pg. 199
- Diagrams showing fusion
- Digital resources
- Spotlight Physics Grade 10 pg. 200
- Diagrams showing applications
- Spotlight Physics Grade 10 pg. 200
- Digital resources
- Charts on carbon dating
- Spotlight Physics Grade 10 pg. 201
- Safety signs
- Digital resources
- Spotlight Physics Learner's Book pg. 205
- Plastic pen, woolen cloth
- Small pieces of paper

- Written tests - Comparison tables - Oral questions
- Written tests - Problem-solving - Oral questions

Electricity and Magnetism

The law of electrostatics
Methods of charging conductors - Induction and Contact
Methods of charging conductors - Separation and charge distribution

By the end of the lesson, the learner should be able to:

- State the law of electrostatics
- Demonstrate attraction and repulsion between charged bodies
- Connect charge interactions to how dust sticks to TV screens

- Carry out activities to investigate the law of electrostatics using charged balloons
- Discuss with peers the interaction between like and unlike charges
- Record observations on charge interactions

Why do some charged objects attract while others repel?

- Spotlight Physics Learner's Book pg. 207
- Balloons, woolen cloth
- Thread, retort stands
- Metre rule
- Spotlight Physics Learner's Book pg. 208
- Metallic spheres on insulated stands
- Charged polythene and glass rods
- Connecting wire for earthing
- Spotlight Physics Learner's Book pg. 211
- Two metallic spheres on insulated stands
- Charged rods
- Charts showing charge distribution

- Observation - Oral questions - Practical assessment

Electricity and Magnetism

Electric field patterns
The electroscope - Structure, charging and discharging
Uses of electroscope
Applications - Spray painting, precipitators and photocopiers

By the end of the lesson, the learner should be able to:

- Define electric field and draw field lines
- Sketch electric field patterns for point charges, dipoles and parallel plates
- Relate electric field patterns to how capacitors store energy in electronic devices

- Discuss with peers electric field patterns around charged particles
- Draw field patterns for positive and negative point charges
- Sketch field patterns for like charges, unlike charges and parallel plates
- Use digital media to visualize electric fields

How do electric field lines represent the force on charges?

- Spotlight Physics Learner's Book pg. 214
- Charts showing electric field patterns
- Digital resources
- Drawing materials
- Spotlight Physics Learner's Book pg. 216
- Gold-leaf electroscope
- Charged polythene and glass rods
- Conical flask, aluminium foil, metal spoon
- Spotlight Physics Learner's Book pg. 219
- Various charged materials
- Conductors and insulators for testing
- Spotlight Physics Learner's Book pg. 221
- Charts and diagrams
- Videos on spray painting

- Diagram sketching - Oral questions - Written tests

Electricity and Magnetism

Applications - Lightning arrestors and safety measures
Applications - Touch screens, fingerprinting and capacitors
Current and potential difference

By the end of the lesson, the learner should be able to:

- Explain the design and function of lightning arrestors
- Describe safety measures in transportation of flammable substances
- Relate lightning arrestors to protection of buildings during thunderstorms

- Discuss the design and function of lightning arrestors
- Explain why metallic chains are attached to fuel tankers
- Research safety in transportation of flammable liquids and gases
- Discuss why people should not stand under trees during storms

Why are lightning arrestors installed on tall buildings?

- Spotlight Physics Learner's Book pg. 223
- Pictures of lightning arrestors
- Charts on safety measures
- Digital resources
- Spotlight Physics Learner's Book pg. 225
- Smartphones and tablets
- Digital resources
- Charts on touch screen technology
- Spotlight Physics Learner's Book pg. 228
- Dry cells, cell holders
- Ammeter, voltmeter, bulb
- Connecting wires, switch

- Oral questions - Written assignments - Group discussions

Electricity and Magnetism

Electromotive force and internal resistance
Ohm's law - Verification and calculations
EMF equation and internal resistance determination
Ohmic and non-ohmic conductors
Factors affecting resistance - Length and cross-sectional area
Factors affecting resistance - Temperature and resistivity
Methods of determining resistance

By the end of the lesson, the learner should be able to:

- Define electromotive force and internal resistance
- Distinguish between EMF and terminal potential difference
- Relate internal resistance to why old batteries provide less power

- Investigate the effect of length and cross-sectional area on resistance
- Establish relationships R ∝ L and R ∝ 1/A
- Relate wire dimensions to why thick, short cables are used for car batteries

- Connect voltmeters across a cell in open and closed circuits
- Compare voltmeter readings when switch is open and closed
- Discuss lost voltage and internal resistance
- Derive the relationship E = V + Ir
- Set up circuit with nichrome wire on metre rule
- Measure resistance at different lengths and plot R against L
- Measure resistance of wires with different diameters
- Plot R against A and establish inverse relationship

Why does a cell's voltage drop when connected in a circuit?
How do length and thickness of a wire affect its resistance?

- Spotlight Physics Learner's Book pg. 231
- Dry cells, two voltmeters
- Known resistors, switch
- Connecting wires
- Spotlight Physics Learner's Book pg. 232
- Nichrome wire, ammeter
- Voltmeter, rheostat
- Dry cells, graph paper
- Spotlight Physics Learner's Book pg. 236
- Dry cells, ammeter
- Graph paper
- Spotlight Physics Learner's Book pg. 242
- Torch bulb, thermistor
- Semiconductor diode
- Ammeter, voltmeter, rheostat
- Spotlight Physics Learner's Book pg. 245
- Nichrome wire, metre rule
- Wires of different thickness
- Micrometer screw gauge, ammeter, voltmeter
- Spotlight Physics Learner's Book pg. 248
- Tungsten coil, beaker
- Thermometer, heat source
- Ammeter, voltmeter
- Spotlight Physics Learner's Book pg. 251
- Metre bridge, Wheatstone bridge components
- Galvanometer, jockey
- Resistors with colour codes

- Practical assessment - Oral questions - Written calculations
- Practical assessment - Graph plotting - Written conclusions

Electricity and Magnetism

Types of resistors and current-voltage laws
Effective resistance in series and parallel

By the end of the lesson, the learner should be able to:

- Identify and classify types of resistors (fixed, variable, linear, non-linear)
- Verify laws of current and voltage in series and parallel circuits
- Connect resistor types to volume controls and temperature sensors

- Study different types of resistors and their applications
- Connect bulbs in series and verify I₁ = I₂ = I₃ and V = V₁ + V₂ + V₃
- Connect bulbs in parallel and verify I = I₁ + I₂ + I₃ and V₁ = V₂ = V₃
- Discuss applications of rheostats and potentiometers

Why is current the same in series but voltage the same in parallel?

- Spotlight Physics Learner's Book pg. 255
- Various types of resistors
- Identical bulbs, ammeters
- Voltmeters, dry cells
- Spotlight Physics Learner's Book pg. 263
- Resistors of known values
- Scientific calculators
- Circuit diagrams, worksheets

- Practical assessment - Oral questions - Written assignments

Electricity and Magnetism

Solving complex resistor network problems
Relationship of V, I and P - Power equations

By the end of the lesson, the learner should be able to:

- Analyse circuits with multiple series-parallel combinations
- Calculate current through and voltage across each resistor
- Apply circuit analysis to troubleshoot electrical faults in appliances

- Identify series and parallel sections in complex circuits
- Calculate effective resistance step by step
- Determine current distribution in branches
- Calculate potential difference across each component

How do we analyse circuits with both series and parallel resistors?

- Spotlight Physics Learner's Book pg. 267
- Complex circuit diagrams
- Scientific calculators
- Worksheets with problems
- Spotlight Physics Learner's Book pg. 270
- Power rating labels from appliances
- Worksheets

- Written calculations - Circuit analysis - Oral questions

Electricity and Magnetism

Factors affecting heating effect of electric current
Applications of heating effect of electric current

By the end of the lesson, the learner should be able to:

- State Joule's law of electrical heating
- Investigate factors affecting heating effect (time, current, resistance)
- Relate heating factors to why electric kettles boil water faster than immersion heaters

- Investigate effect of time, current and resistance on heating
- Plot graphs of temperature change against time, I² and R
- Derive H = I²Rt (Joule's law)
- Discuss the significance of each factor

What factors determine the amount of heat produced by electric current?

- Spotlight Physics Learner's Book pg. 273
- Heating coils, beaker
- Thermometer, stopwatch
- Ammeter, voltmeter, rheostat
- Spotlight Physics Learner's Book pg. 277
- Pictures of electrical appliances
- Fuses of different ratings
- Digital resources

- Practical assessment - Graph plotting - Written conclusions

Electricity and Magnetism

Power rating and electrical energy calculations
Conductors, semiconductors, insulators and superconductors
Distinguishing materials using energy band theory
Effect of temperature on conductors and semiconductors
Intrinsic semiconductors and doping
N-type and p-type semiconductors
Applications of conductors and insulators
Applications of semiconductors and superconductors
Application of conductors and insulators in car wiring system

By the end of the lesson, the learner should be able to:

- Interpret power ratings on electrical appliances
- Calculate electrical energy consumption using E = Pt
- Apply energy calculations to reduce electricity bills at home

- Investigate the effect of temperature on resistance of conductors and semiconductors
- Plot and interpret R-T graphs for different materials
- Relate temperature effects to thermistor use in temperature sensors and fire alarms

- Read and interpret power ratings on appliance labels
- Calculate energy consumed in joules and kilowatt-hours
- Calculate cost of running appliances using electricity tariffs
- Discuss energy-saving practices
- Set up circuit with tungsten coil in water bath
- Heat water and record resistance at different temperatures
- Plot R-T graph showing resistance increase for metals
- Replace with thermistor and observe resistance decrease with temperature
- Discuss concept of superconductivity at very low temperatures

How do we calculate the cost of running electrical appliances?
Why does resistance increase with temperature for metals but decrease for semiconductors?

- Spotlight Physics Learner's Book pg. 278
- Power rating labels
- Scientific calculators
- Electricity tariff information
- Spotlight Physics Learner's Book pg. 282
- Models of atomic structures
- Charts showing material classification
- Digital resources
- Spotlight Physics Learner's Book pg. 284
- Charts showing energy bands
- Digital resources
- Drawing materials
- Spotlight Physics Learner's Book pg. 286
- Tungsten coil, thermistor
- Beaker, thermometer
- Heat source, ammeter, voltmeter
- Spotlight Physics Learner's Book pg. 288
- Charts showing doping process
- Digital resources
- Models of crystal structures
- Spotlight Physics Learner's Book pg. 289
- Diagrams of crystal lattice
- Charts showing n-type and p-type formation
- Digital resources
- Spotlight Physics Learner's Book pg. 292
- Samples of electrical cables
- Pictures of electrical installations
- Spotlight Physics Learner's Book pg. 293
- Electronic components
- Pictures of semiconductor devices
- Spotlight Physics Learner's Book pg. 294
- Car wiring diagrams
- Samples of automotive cables
- Resource persons (mechanics)

- Written calculations - Oral questions - Problem-solving tests
- Practical assessment - Graph plotting - Comparative analysis