Mechanics and Thermal Physics

Introduction to Physics - Meaning of Physics as a science

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

- Define Physics as a branch of science
- Explain why Physics is considered a science
- Relate Physics to everyday observations like vehicle movement and electrical appliances

- Discuss in groups the meaning of Physics using textbooks and digital resources
- Search for the meaning of Physics as a branch of science
- Share explanations on the meaning of Physics with classmates

What is Physics and why is it considered a science?

- Spotlight Physics Grade 10 pg. 1
- Digital devices with internet access
- Physics textbooks

- Oral questions - Group discussions - Observation

Mechanics and Thermal Physics

Introduction to Physics - Branches of Physics
Introduction to Physics - Importance of Physics in day-to-day life
Introduction to Physics - Relationship with other fields and careers
Pressure - Atmospheric pressure as used in Physics

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

- Identify the main branches of Physics
- Describe each branch of Physics and its focus area
- Connect branches of Physics to technologies like smartphones and medical equipment

- Use digital devices to search for main branches of Physics
- Discuss with peers the branches of Physics (mechanics, electricity & magnetism, thermodynamics, optics, waves, electronics, modern physics, astronomy)
- Share findings with classmates

How do different branches of Physics explain various natural phenomena?

- Spotlight Physics Grade 10 pg. 2
- Digital resources
- Charts showing branches of Physics
- Spotlight Physics Grade 10 pg. 3
- Pictures of technological devices
- Digital resources
- Spotlight Physics Grade 10 pg. 5
- Career booklets
- Digital devices
- Charts and manila papers
- Spotlight Physics Grade 10 pg. 9
- Balloon, glass, water, manila paper

- Written assignments - Oral questions - Observation

Mechanics and Thermal Physics

Pressure - Demonstrating atmospheric pressure effects
Pressure - Factors affecting pressure in liquids
Pressure - Investigating pressure variation with depth
Pressure - Deriving and applying P = ρgh

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

- Perform experiments to show atmospheric pressure exists
- Explain observations from atmospheric pressure experiments
- Connect atmospheric pressure to crushing can experiment and weather phenomena

- Pour hot water into plastic bottle and observe deformation when cooled
- Perform balloon in bottle experiment with hole at point B
- Discuss role of atmospheric pressure in each experiment

Why does a plastic bottle crush when hot water inside it cools?

- Spotlight Physics Grade 10 pg. 11
- Plastic bottles, hot water, cold water
- Balloon, optical pin, sellotape
- Spotlight Physics Grade 10 pg. 12
- U-tube, rubber tubing, thistle funnel
- Retort stand, water, brine, glycerine
- Spotlight Physics Grade 10 pg. 14
- Tin, sellotape, nail, hammer
- Water, brine, ruler
- Spotlight Physics Grade 10 pg. 15
- Scientific calculators
- Worked examples

- Practical reports - Observation - Oral questions

Mechanics and Thermal Physics

Pressure - Solving pressure problems using P = ρgh
Pressure - Pascal's principle and transmission of pressure

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

- Calculate pressure at various depths in different liquids
- Determine total pressure including atmospheric pressure
- Apply calculations to real situations like diving depths and water storage tanks

- Solve problems involving barometer construction
- Calculate pressure exerted by water at bottom of tanks
- Determine force on tap openings using pressure formula
- Work out total pressure at various depths

How do divers experience increased pressure at greater depths?

- Spotlight Physics Grade 10 pg. 16
- Scientific calculators
- Problem worksheets
- Spotlight Physics Grade 10 pg. 18
- Two syringes (different sizes)
- Rubber tubing, water

- Written exercises - Class work - Oral questions

Mechanics and Thermal Physics

Pressure - Hydraulic lift and brake systems

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

- Explain how hydraulic lift works
- Calculate force multiplication in hydraulic systems
- Relate hydraulic principles to car jacks and lifting equipment

- Study hydraulic lift diagram and identify components
- Derive relationship between force, pressure and area in hydraulic systems
- Solve numerical problems on hydraulic lift
- Discuss advantages of hydraulic systems

How do hydraulic lifts multiply force to lift heavy loads?

- Spotlight Physics Grade 10 pg. 19
- Hydraulic lift diagrams
- Scientific calculators

- Numerical problems - Written tests - Oral questions

Mechanics and Thermal Physics

Pressure - Car hydraulic braking system
Pressure - Drinking straw and syringe applications

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

- Identify parts of hydraulic brake system
- Explain how hydraulic brakes work
- Relate brake system knowledge to road safety and vehicle maintenance

- Study diagram of hydraulic braking system
- Identify functions of brake pedal, master cylinder, slave cylinder, brake fluid
- Visit nearby garage to observe braking system
- Discuss properties of brake fluid

Why do car brakes fail when air enters the brake pipes?

- Spotlight Physics Grade 10 pg. 21
- Hydraulic brake diagrams
- Resource persons (mechanics)
- Spotlight Physics Grade 10 pg. 24
- Straws, syringes
- Glass, water, optical pin

- Oral questions - Written assignments - Field visit reports

Mechanics and Thermal Physics

Pressure - Siphoning principle and applications
Pressure - Pumping mechanisms

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

- Demonstrate siphoning process
- Explain conditions for continuous siphoning
- Apply siphoning knowledge to fuel transfer and aquarium maintenance

- Set up siphon using two containers at different heights
- Fill tube with water and demonstrate siphoning
- Identify conditions for continuous flow
- Calculate pressure difference in siphon system

Under what conditions does a siphon work continuously?

- Spotlight Physics Grade 10 pg. 26
- Plastic/rubber tube
- Two containers, water
- Spotlight Physics Grade 10 pg. 27
- Bicycle pump
- Lift pump diagrams

- Practical observation - Oral questions - Written reports

Mechanics and Thermal Physics

Mechanical Properties - Types of mechanical properties
Mechanical Properties - Demonstrating ductility, brittleness and malleability

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
- Spotlight Physics Grade 10 pg. 34
- G-clamp, metal rods, hammer
- Nails, glass rod, masses

- Oral questions - Group discussions - Written assignments

Mechanics and Thermal Physics

Mechanical Properties - Elasticity and hardness
Mechanical Properties - Investigating Hooke's Law

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

- Demonstrate elasticity using springs and rubber bands
- Test hardness of different materials
- Relate elasticity to shock absorbers and hardness to cutting tools

- Stretch springs and rubber bands and observe return to original shape
- Use sharp object to mark different materials and compare hardness
- Classify materials as elastic or hard
- Discuss applications of elastic and hard materials

Why do springs return to their original shape after stretching?

- Spotlight Physics Grade 10 pg. 36
- Springs, rubber bands
- Nail, various material samples
- Spotlight Physics Grade 10 pg. 38
- Spiral spring, retort stand
- Masses, metre rule

- Practical demonstrations - Oral questions - Written assignments

Mechanics and Thermal Physics

Mechanical Properties - Graphical analysis and spring constant
Mechanical Properties - Combined spring constant

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

- Plot force-extension graph
- Determine spring constant from graph gradient
- Use spring constant to predict extension for given forces

- Plot graph of force against extension
- Determine gradient of straight line
- Identify spring constant from graph
- Discuss elastic limit and plastic deformation

How do we determine the spring constant of a spiral spring?

- 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

- Graph plotting - Gradient calculation - Written tests

Mechanics and Thermal Physics

Mechanical Properties - Hooke's Law in car shock absorbers
Mechanical Properties - Tensile stress and strain

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

- 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

How do shock absorbers provide a smooth ride on bumpy roads?

- Spotlight Physics Grade 10 pg. 47
- Shock absorber diagrams
- Digital resources
- Spotlight Physics Grade 10 pg. 48
- Scientific calculators
- Worked examples

- Oral questions - Written assignments - Research presentations

Mechanics and Thermal Physics

Mechanical Properties - Young's Modulus determination
Mechanical Properties - Industrial applications

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

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

- 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

What does the stress-strain graph tell us about material behavior?

- Spotlight Physics Grade 10 pg. 50
- Graph papers
- Scientific calculators
- Spotlight Physics Grade 10 pg. 52
- Digital resources
- Sample products (springs, wires, tools)

- Graph interpretation - Numerical problems - Written tests

Mechanics and Thermal Physics

Temperature and Thermal Expansion - Meaning of temperature
Temperature and Thermal Expansion - Temperature conversion
Temperature and Thermal Expansion - Liquid-in-glass thermometers

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
- Scientific calculators
- Spotlight Physics Learner's Book pg. 57
- Alcohol-in-glass thermometer
- Beakers with water
- Heat source

- Oral questions - Observation - Written assignments

Mechanics and Thermal Physics

Temperature and Thermal Expansion - Clinical thermometer
Temperature and Thermal Expansion - Thermocouple thermometer
Temperature and Thermal Expansion - RTDs and thermistors
Temperature and Thermal Expansion - Infrared and bimetallic thermometers

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

- Identify features of a clinical thermometer
- Explain the function of the constriction in clinical thermometers
- Connect clinical thermometer use to healthcare and disease diagnosis

- Draw and label parts of a clinical thermometer
- Measure body temperature using a clinical thermometer
- Discuss why clinical thermometers have constrictions

Why does a clinical thermometer have a constriction?

- 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
- Infrared thermometer
- Bimetallic thermometer
- Various surfaces

- Practical assessment - Oral questions - Written tests

Mechanics and Thermal Physics

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:

- Demonstrate thermal expansion in solids using ball and ring apparatus
- Explain why solids expand when heated
- Connect thermal expansion to why tight jar lids loosen when heated

- Carry out activities using ball and ring apparatus to demonstrate expansion
- Discuss particle theory explanation for expansion
- Record observations and draw conclusions

Why does a heated ball fail to pass through a ring it passed through when cold?

- 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 - Observation - Written questions

Mechanics and Thermal Physics

Temperature and Thermal Expansion - Anomalous expansion of water
Temperature and Thermal Expansion - Applications in daily life

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

- Oral questions - Written assignments - Group discussions

Mechanics and Thermal Physics

Moments and Equilibrium - Centre of gravity of regular objects
Moments and Equilibrium - Centre of gravity of triangles
Moments and Equilibrium - Centre of gravity of irregular objects

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

- Define centre of gravity
- Determine the C.O.G of regular shaped objects (square, rectangle, circle)
- Relate centre of gravity to balancing objects on fingertips

- Use balancing method to find C.O.G of regular cut-outs
- Use geometrical construction (diagonals) to locate C.O.G
- Compare results from both methods

Where is the centre of gravity of a square located?

- Spotlight Physics Learner's Book pg. 78
- Cut-out shapes (square, rectangle, circle)
- Pencil for balancing
- Ruler
- 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

- Practical assessment - Observation - Oral questions

Mechanics and Thermal Physics

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

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

- Define stable equilibrium
- Demonstrate stable equilibrium using cone on its base
- Connect stable equilibrium to design of racing cars with low C.O.G

- Place cone on its wide base and push slightly
- Observe return to original position
- Discuss characteristics of stable equilibrium

Why does a cone on its base return to its original position when pushed?

- 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

- Practical assessment - Oral questions - Written assignments

Mechanics and Thermal Physics

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:

- Calculate moment of a force using Moment = Force × perpendicular distance
- State the SI unit of moment
- Apply moment calculations to using spanners to loosen tight bolts

- Apply forces at different distances from pivot
- Calculate moments from experimental data
- Solve numerical problems on moments

How does increasing distance from pivot affect the turning effect?

- Spotlight Physics Learner's Book pg. 90
- Ruler on pivot
- Spring balance
- 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

- Written tests - Problem-solving exercises - Practical assessment

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

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

- Practical assessment - Written tests - Oral questions

Mechanics and Thermal Physics

Moments and Equilibrium - Applications and resolution of forces
Energy, Work, Power and Machines - Definition of work
Energy, Work, Power and Machines - Calculating work done
Energy, Work, Power and Machines - Energy and its forms

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

- Describe applications of torque and couples
- Resolve forces to find perpendicular components
- Apply moments to real-life situations like using spanners, screwdrivers and bicycle pedalling

- Discuss applications of moments in daily life
- Solve problems involving forces at angles
- Calculate moments when force is not perpendicular

How do we calculate moments when force is applied at an angle?

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

- Written tests - Oral questions - Project presentations

Mechanics and Thermal Physics

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
Energy, Work, Power and Machines - Elastic potential energy

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

- Define power as rate of doing work
- Calculate power using P = W/t or P = F × v
- Compare power ratings of different electrical appliances like kettles, bulbs and heaters

- Calculate power from work and time measurements
- Compare power of different activities
- Solve numerical problems on power

Why do some appliances consume more electricity than others?

- Spotlight Physics Learner's Book pg. 108
- Stopwatch
- Spring balance
- Known masses
- Calculators
- Spotlight Physics Learner's Book pg. 112
- Toy car
- Ramp
- 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

- Written tests - Problem-solving - Practical assessment

Mechanics and Thermal Physics

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

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

- State the law of conservation of energy
- Demonstrate energy transformation using a pendulum
- Connect energy conservation to swings in playgrounds and roller coasters

- Set up simple pendulum and observe energy changes
- Identify P.E and K.E at different positions
- Verify total mechanical energy is constant

What happens to energy as a pendulum swings?

- 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

- Practical assessment - Oral questions - Written tests

Mechanics and Thermal Physics

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 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

- Discuss meaning of MA, VR and efficiency
- Calculate MA and VR from experimental data
- Relate efficiency to energy losses

Why is the efficiency of machines always less than 100%?

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

- Written tests - Problem-solving - Practical assessment

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Pulleys

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

- Practical assessment - Written tests - Observation

Mechanics and Thermal Physics

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 inclined plane as length/height
- Calculate VR of screw using pitch and circumference
- Connect inclined planes to loading ramps and wheelchair access, and screws to car jacks

- Roll objects up inclined plane at different angles
- Calculate VR of inclined plane
- Discuss relationship between screw and inclined plane

How does the angle of inclination affect the effort required?

- Spotlight Physics Learner's Book pg. 134
- Inclined plane
- Screw jack
- Spring balance
- Metre rule
- Spotlight Physics Learner's Book pg. 137
- Wheel and axle model
- Gear wheels
- Bicycle

- Practical assessment - Written tests - Problem-solving

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

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

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

- 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

Why does the wavelength change when waves move from deep to shallow water?

- 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

- Practical assessment - Observation - Oral questions

Waves and Optics

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 interference of waves using a ripple tank
- Identify constructive and destructive interference patterns
- Relate interference patterns to noise-cancelling headphones and acoustic design

- Fix two spherical balls below the vibrator bar as coherent sources
- Observe dark and bright radial lines showing interference pattern
- Discuss how bright lines show constructive and dark lines show destructive interference

How are interference patterns formed in a ripple tank?

- Spotlight Physics Grade 10 pg. 160
- Ripple tank
- Two spherical balls
- White manila paper
- Spotlight Physics Grade 10 pg. 161
- Digital resources
- Physics reference books

- Practical assessment - Observation - Oral questions

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

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

- 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

How do stationary waves form in open pipes?

- Spotlight Physics Grade 10 pg. 169
- Digital resources
- Charts showing open pipe harmonics
- Spotlight Physics Grade 10 pg. 173
- Audio recordings of approaching vehicles

- Written tests - Oral questions - Problem-solving exercises

Waves and Optics

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:

- 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

- 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 does the movement of a sound source affect the waves detected by an observer?

- 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

- 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

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

- 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

How do we write nuclear equations for alpha decay?

- Spotlight Physics Grade 10 pg. 186
- Digital resources
- Periodic table
- Spotlight Physics Grade 10 pg. 187

- Written tests - Problem-solving exercises - 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

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
Radioactivity - Nuclear fusion and applications

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
- Spotlight Physics Grade 10 pg. 199
- Diagrams showing fusion

- Written tests - Diagram interpretation - Oral questions

Waves and Optics

Radioactivity - Applications in medicine and industry
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 medicine and industry
- Explain how gamma rays treat cancer and sterilize equipment
- Relate industrial applications to detecting pipe leaks and measuring thickness

- Discuss medical applications: cancer treatment, sterilization, imaging
- Explain industrial uses: detecting pipe bursts, thickness measurement, flaw detection
- Research use of radioactive tracers in various fields

How is radioactivity used to treat cancer and detect pipe leaks?

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

- Research presentations - Written tests - Oral questions