Mechanics and Thermal Physics

Mechanical Properties - Types of mechanical properties

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

- Define mechanical properties of materials
- Identify different types of materials and their properties
- Connect material properties to selection of materials for tools like axes and hammers

- Discuss meaning of materials and types (metals, wood, plastics, glass)
- Search for properties: ductility, malleability, elasticity, brittleness, strength, hardness, stiffness
- Relate properties to everyday materials

Why are different materials used for different purposes?

- Spotlight Physics Grade 10 pg. 33
- Samples of different materials
- Digital resources

- Oral questions - Group discussions - Written assignments

Mechanics and Thermal Physics

Mechanical Properties - Demonstrating ductility, brittleness and malleability
Mechanical Properties - Elasticity and hardness

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

- Demonstrate ductility, brittleness and malleability
- Classify materials based on their mechanical behavior
- Apply knowledge to explain why copper is used for wires and glass breaks easily

- Use G-clamp to fix metal rods and apply loads until bending or breaking
- Hammer iron nail and observe flattening
- Compare behavior of glass, wood, lead, copper and steel rods
- Classify materials as ductile, brittle or malleable

Why does glass break suddenly while copper bends without breaking?

- Spotlight Physics Grade 10 pg. 34
- G-clamp, metal rods, hammer
- Nails, glass rod, masses
- Spotlight Physics Grade 10 pg. 36
- Springs, rubber bands
- Nail, various material samples

- Practical observation - Classification tables - Written tests

Mechanics and Thermal Physics

Mechanical Properties - Investigating Hooke's Law
Mechanical Properties - Graphical analysis and spring constant
Mechanical Properties - Combined spring constant

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

- State Hooke's Law
- Investigate relationship between force and extension
- Apply Hooke's Law to weighing scales and spring balances

- Set up spiral spring with pointer and metre rule
- Add masses in steps and record extensions
- Calculate force for each mass
- Record data in table and observe pattern

What is the relationship between stretching force and extension of a spring?

- Spotlight Physics Grade 10 pg. 38
- Spiral spring, retort stand
- Masses, metre rule
- Spotlight Physics Grade 10 pg. 39
- Graph papers
- Data from previous experiment
- Scientific calculators
- Spotlight Physics Grade 10 pg. 42
- Two identical springs
- Retort stand, masses
- Metre rule

- Data recording - Practical reports - Oral questions

Mechanics and Thermal Physics

Mechanical Properties - Hooke's Law in car shock absorbers
Mechanical Properties - Tensile stress and strain
Mechanical Properties - Young's Modulus determination
Mechanical Properties - Industrial applications
Temperature and Thermal Expansion - Meaning of temperature

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

- Explain application of Hooke's Law in shock absorbers
- Describe how suspension systems work
- Relate overloading of vehicles to damage of shock absorbers

- Define Young's Modulus
- Calculate Young's Modulus from stress and strain
- Interpret stress-strain graphs for material selection in construction

- Research application of Hooke's Law in car shock absorbers
- Discuss how shock absorbers compress and extend
- Explain damping effect in suspension systems
- Discuss effects of overloading on vehicle springs

- Derive Young's Modulus as ratio of stress to strain
- Plot stress-strain graph and identify regions
- Identify elastic limit, yield point and breaking point
- Solve problems involving Young's Modulus

How do shock absorbers provide a smooth ride on bumpy roads?
What does the stress-strain graph tell us about material behavior?

- Spotlight Physics Grade 10 pg. 47
- Shock absorber diagrams
- Digital resources
- Spotlight Physics Grade 10 pg. 48
- Scientific calculators
- Worked examples
- Spotlight Physics Grade 10 pg. 50
- Graph papers
- Scientific calculators
- Spotlight Physics Grade 10 pg. 52
- Digital resources
- Sample products (springs, wires, tools)
- Spotlight Physics Learner's Book pg. 56
- Bowls of water at different temperatures
- Digital resources

- Oral questions - Written assignments - Research presentations
- Graph interpretation - Numerical problems - Written tests

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
Temperature and Thermal Expansion - RTDs and thermistors

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
- Spotlight Physics Learner's Book pg. 61
- Digital thermometer
- Digital resources
- Reference books

- Written tests - Oral questions - Problem-solving exercises

Mechanics and Thermal Physics

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

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

- Explain the working principle of infrared thermometers
- Describe how bimetallic strips work in thermometers
- Relate infrared thermometers to contactless temperature screening in hospitals and airports

- Use infrared thermometer to measure temperature of different surfaces
- Discuss the distance-to-spot ratio in infrared thermometers
- Identify parts of bimetallic thermometer

Why are infrared thermometers preferred for contactless temperature measurement?

- 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
- Spotlight Physics Learner's Book pg. 67
- Round-bottomed flask
- Narrow tube with cork
- Coloured water
- Heat source

- Practical assessment - Oral questions - Written tests

Mechanics and Thermal Physics

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:

- 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

- 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 ice float on water?

- 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

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

- 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

- Define moment of a force
- Identify factors affecting moment of a force
- Connect moments to why door handles are placed far from hinges

- Cut out triangular shapes from cardboard
- Construct medians and mark intersection point
- Verify C.O.G by balancing on pencil tip
- Push door at different distances from hinges
- Compare ease of opening door at different points
- Discuss meaning of moment of a force

How do we find the centre of gravity of a triangle?
Why is it easier to open a door by pushing at the handle?

- 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
- 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
- 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 questions - Observation
- Observation - Oral questions - Written assignments

Mechanics and Thermal Physics

Moments and Equilibrium - Determining mass using moments
Moments and Equilibrium - Parallel forces and two supports

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

- Suspend metre rule and find balance point
- Use known mass to determine mass of rule
- Apply principle of moments in calculations

How can we determine the mass of a ruler using moments?

- 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

- Practical assessment - Written tests - Problem-solving

Mechanics and Thermal Physics

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:

- 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

- Demonstrate couple using a plank fixed at centre
- Apply equal forces in opposite directions
- Calculate torque from experimental data

Why do we need two hands to turn a steering wheel smoothly?

- 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 - 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
Energy, Work, Power and Machines - Kinetic energy
Energy, Work, Power and Machines - Gravitational potential energy

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
- Spotlight Physics Learner's Book pg. 112
- Toy car
- Ramp
- Measuring tape
- Beam balance
- Spotlight Physics Learner's Book pg. 114
- Small weights
- Beam balance
- Stand

- Practical assessment - Written tests - Problem-solving

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Elastic potential energy
Energy, Work, Power and Machines - Conservation of mechanical energy
Energy, Work, Power and Machines - Energy transformations
Energy, Work, Power and Machines - Types of simple machines
Energy, Work, Power and Machines - MA, VR and efficiency
Energy, Work, Power and Machines - Levers

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

- Define elastic potential energy
- Demonstrate elastic P.E in stretched materials
- Connect elastic potential energy to catapults, bow and arrow, and car shock absorbers

- 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

- Stretch rubber bands and release to propel objects
- Investigate elastic P.E in springs
- Calculate elastic P.E using area under F-e graph
- Discuss meaning of MA, VR and efficiency
- Calculate MA and VR from experimental data
- Relate efficiency to energy losses

How do stretched materials store energy?
Why is the efficiency of machines always less than 100%?

- 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
- 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
- Spotlight Physics Learner's Book pg. 129
- Simple machines
- Spring balance
- Known masses
- Metre rule
- Spotlight Physics Learner's Book pg. 131
- Lever apparatus

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

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Pulleys
Energy, Work, Power and Machines - Inclined plane and screw
Energy, Work, Power and Machines - Wheel and axle, gears

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

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

- Set up single fixed and movable pulleys
- Set up block and tackle system
- Calculate MA, VR and efficiency experimentally

How does the number of pulleys affect the velocity ratio?

- 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
- Spotlight Physics Learner's Book pg. 137
- Wheel and axle model
- Gear wheels
- Bicycle

- Practical assessment - Written tests - Observation

Mechanics and Thermal Physics
Waves and Optics
Waves and Optics
Waves and Optics

Energy, Work, Power and Machines - Hydraulic machines and applications
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 working principle of hydraulic machines
- Calculate force multiplication in hydraulic systems
- Connect hydraulic machines to car brakes, car jacks and construction equipment

- Construct simple hydraulic system using syringes
- Calculate force and VR of hydraulic press
- Discuss applications in vehicles and construction
- Identify simple machines in treadmills, elevators and escalators

How do hydraulic machines multiply force?

- Spotlight Physics Learner's Book pg. 139
- Syringes of different sizes
- Tubing
- Water
- Pictures of hydraulic machines
- 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

- Practical assessment - Written tests - Project presentations

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
Properties of Waves - Demonstrating refraction 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
- Spotlight Physics Grade 10 pg. 158
- Transparent glass plate

- Oral questions - Observation - Practical demonstration

Waves and Optics

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
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:

- Demonstrate diffraction of waves using a ripple tank
- Investigate how aperture size affects diffraction
- Connect diffraction to how radio waves reach behind buildings

- 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

- Place two metal barriers with an aperture in front of plane waves
- Vary the aperture size from 8 cm to 0.5 cm and observe emerging waves
- Place an obstacle in front of waves and observe diffraction around it

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

What factors determine the extent of wave diffraction?
How do radios detect and convert FM signals to sound?

- Spotlight Physics Grade 10 pg. 159
- Ripple tank
- Two straight metal barriers
- Opaque obstacle
- Spotlight Physics Grade 10 pg. 160
- Two spherical balls
- White manila paper
- Spotlight Physics Grade 10 pg. 161
- Digital resources
- Physics reference books
- 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

- Practical assessment - Observation - Written assignments
- 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
Properties of Waves - Stationary waves in open 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
- Spotlight Physics Grade 10 pg. 169
- Charts showing open pipe harmonics

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Meaning of Doppler effect
Properties of Waves - Demonstrating Doppler effect

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

- Explain the meaning of Doppler effect
- Describe how sound frequency changes with relative motion
- Connect Doppler effect to the changing pitch of an ambulance siren

- Discuss the scenario of a blind man detecting vehicle movement by sound
- Explain why the pitch of a siren increases when approaching and decreases when receding
- Research the discovery of Doppler effect by Christian Doppler

Why does the pitch of a siren change as an ambulance passes by?

- Spotlight Physics Grade 10 pg. 173
- Digital resources
- Audio recordings of approaching vehicles
- Spotlight Physics Grade 10 pg. 174
- Audio frequency generator
- Rope or spiral spring

- Oral questions - Observation - Written assignments

Waves and Optics

Properties of Waves - Applications of Doppler effect
Radioactivity - Meaning of radioactivity and related terms
Radioactivity - Stability of isotopes and atomic structure
Radioactivity - Types of radiations (alpha, beta, gamma)
Radioactivity - Properties of alpha and beta particles

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

- Describe applications of Doppler effect in various fields
- Explain how Doppler effect is used in astronomy, medicine, and traffic control
- Connect Doppler applications to ultrasound scans and weather forecasting

- 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

- Research applications in astronomy for measuring galaxy movements
- Discuss medical imaging applications like Doppler sonography
- Explore traffic radar and speed camera applications

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

How is Doppler effect used in medicine and traffic control?
What are the different types of radioactive emissions?

- Spotlight Physics Grade 10 pg. 175
- Digital resources
- Charts showing Doppler applications
- Spotlight Physics Grade 10 pg. 178
- Physics reference books
- Spotlight Physics Grade 10 pg. 180
- Charts showing atomic structure
- Spotlight Physics Grade 10 pg. 181
- Digital resources
- Charts showing radiation types
- Spotlight Physics Grade 10 pg. 182
- Charts comparing radiation properties

- Research presentations - Written tests - Oral questions
- Oral questions - Written tests - Chart interpretation

Waves and Optics

Radioactivity - Properties of gamma rays and comparison of radiations
Radioactivity - Alpha decay and nuclear equations
Radioactivity - Beta decay and gamma decay equations

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

- Describe properties of gamma rays
- Compare all three types of radiations using charts and diagrams
- Relate gamma ray properties to their use in X-ray imaging and cancer treatment

- Discuss gamma ray properties: no charge, no mass, highest penetration
- Make charts comparing penetrating power, ionizing effect, and field deflection
- Use diagrams to illustrate effect of magnetic and electric fields on radiations

Why are gamma rays not deflected by electric or magnetic fields?

- Spotlight Physics Grade 10 pg. 183
- Digital resources
- Charts and diagrams
- Spotlight Physics Grade 10 pg. 186
- Periodic table
- Spotlight Physics Grade 10 pg. 187

- Chart making - Written tests - Oral questions

Waves and Optics

Radioactivity - Uranium-238 decay series
Radioactivity - Detection using electroscope and GM tube

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

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

- 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 does uranium-238 eventually become stable lead-206?

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

- 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
Radioactivity - Nuclear fission and chain reactions
Radioactivity - Nuclear fusion and applications
Radioactivity - Applications in medicine and industry

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

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

- 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

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

How do we calculate the half-life of a radioactive substance?
Why does nuclear fusion power the sun and stars?

- Spotlight Physics Grade 10 pg. 195
- Graph paper
- Scientific calculators
- Spotlight Physics Grade 10 pg. 197
- Digital resources
- Physics reference books
- Spotlight Physics Grade 10 pg. 198
- Diagrams of chain reactions
- Digital resources
- Spotlight Physics Grade 10 pg. 199
- Diagrams showing fusion
- Digital resources
- Spotlight Physics Grade 10 pg. 200
- Diagrams showing applications

- Written tests - Problem-solving exercises - Graph interpretation
- Written tests - Comparison tables - Oral questions

Waves and Optics

Radioactivity - Applications in agriculture and archaeology
Radioactivity - Hazards of radiation and safety precautions

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

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

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

How do scientists use carbon dating to determine the age of fossils?

- Spotlight Physics Grade 10 pg. 200
- Digital resources
- Charts on carbon dating
- Spotlight Physics Grade 10 pg. 201
- Safety signs
- Digital resources

- Written tests - Problem-solving - Oral questions