Waves and Optics

Properties of Waves - Rectilinear propagation 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

In groups, learners are guided to:
- 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

- Oral questions - Observation - Written assignments

Waves and Optics

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

By the end of the lesson, the learner should be able to:
- Explain the meaning of reflection of waves
- Demonstrate reflection of sound waves using a tall building scenario
- Connect reflection to real-life applications like radar systems and car side mirrors
- Explain the meaning of interference of waves
- Demonstrate constructive and destructive interference using two speakers
- Relate interference to hearing loud and quiet zones in concert halls

In groups, learners are guided to:
- Discuss how sound waves bounce off hard surfaces
- Identify applications of reflection in radar, mirrors, and fibre optics
- Use print or non-print media to research reflection applications
- Set up two identical speakers connected to the same audio frequency generator
- Walk along a line perpendicular to the speakers and observe loud and quiet areas
- Discuss constructive and destructive interference patterns

Why do we hear echoes near tall buildings?
Why do we hear areas of loud and soft sound when two speakers play together?

- Spotlight Physics Grade 10 pg. 148
- Digital resources
- Charts showing reflection
- Spotlight Physics Grade 10 pg. 150
- Glass of water
- Straight object
- Digital resources
- Spotlight Physics Grade 10 pg. 151
- Torch
- Manila paper
- Spotlight Physics Grade 10 pg. 152
- Two identical speakers
- Audio frequency generator
- Digital resources
- Spotlight Physics Grade 10 pg. 154
- Ripple tank and accessories
- Dry cell and cell holder
- White manila paper

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

Waves and Optics

Properties of Waves - Demonstrating reflection using ripple tank
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 reflection of waves using a ripple tank
- Illustrate reflection patterns with different reflector shapes
- Relate reflection patterns to how car headlamps and satellite dishes work

In groups, learners are guided to:
- Place a straight reflector perpendicular to plane waves and observe
- Place the reflector at an acute angle and record observations
- Use concave and convex reflectors to observe different reflection patterns

How do waves behave when they hit different shaped surfaces?

- Spotlight Physics Grade 10 pg. 156
- Ripple tank
- Straight metal reflector
- Concave and convex reflectors
- Spotlight Physics Grade 10 pg. 158
- Transparent glass plate
- White manila paper
- Spotlight Physics Grade 10 pg. 159
- Two straight metal barriers
- Opaque obstacle

- Practical assessment - Observation - Written tests

Waves and Optics

Properties of Waves - Demonstrating interference using ripple tank

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

In groups, learners are guided to:
- 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

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Production of frequency modulated (FM) waves
Properties of Waves - Detection of frequency modulated (FM) waves

By the end of the lesson, the learner should be able to:
- Explain the meaning of frequency modulation
- Describe methods of producing FM waves
- Connect FM to how radio stations broadcast music and news

In groups, learners are guided to:
- 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

How are FM radio signals produced?

- Spotlight Physics Grade 10 pg. 161
- Digital resources
- Physics reference books
- Spotlight Physics Grade 10 pg. 162
- Radio receiver (demonstration)

- Oral questions - Written assignments - Group presentations

Waves and Optics

Properties of Waves - Formation of stationary waves
Properties of Waves - Factors affecting fundamental frequency of vibrating string

By the end of the lesson, the learner should be able to:
- Explain the meaning of stationary waves
- Demonstrate formation of stationary waves using a tuning fork and string
- Connect stationary waves to how guitar strings produce different notes
- 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

In groups, learners are guided to:
- Fix a string to a tuning fork prong and pass over a fixed pulley
- Strike the tuning fork and observe nodes and antinodes
- Discuss how incident and reflected waves superimpose to form stationary waves
- 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 are stationary waves formed in a vibrating string?
How do tension and length affect the frequency of a vibrating string?

- Spotlight Physics Grade 10 pg. 163
- Tuning fork
- String
- Mass (weight)
- Fixed pulley system
- Spotlight Physics Grade 10 pg. 164
- Sonometer apparatus
- Weights
- Two wooden wedges

- Practical assessment - Observation - Oral questions
- Practical assessment - Written tests - Oral questions

Waves and Optics

Properties of Waves - Modes of vibration in strings
Properties of Waves - Stationary waves in closed pipes

By the end of the lesson, the learner should be able to:
- Explain modes of vibration in strings
- Calculate frequencies of harmonics and overtones
- Connect harmonics to the rich sound quality of musical instruments

In groups, learners are guided to:
- Discuss fundamental frequency and how it relates to wavelength
- Calculate first and second overtones using mathematical relationships
- Use the general formula for nth overtone: fn = (n+1)f₀

What are harmonics and overtones in vibrating strings?

- Spotlight Physics Grade 10 pg. 166
- Digital resources
- Charts showing modes of vibration
- Spotlight Physics Grade 10 pg. 167
- Glass tube
- Glass jar with water
- Tuning fork

- Written tests - Oral questions - Problem-solving exercises

Waves and Optics

Properties of Waves - Harmonics in closed pipes

By the end of the lesson, the learner should be able to:
- Explain harmonics in closed pipes
- Calculate frequencies of overtones in closed pipes
- Connect closed pipe harmonics to the limited overtones in some wind instruments

In groups, learners are guided to:
- Discuss the first harmonic (fundamental frequency) in closed pipes
- Calculate second and third harmonics using f = (2n-1)f₀
- Compare harmonic patterns in closed pipes with open pipes

Why do closed pipes only produce odd harmonics?

- Spotlight Physics Grade 10 pg. 168
- Digital resources
- Charts showing harmonics

- Written tests - Problem-solving exercises - Oral questions

Waves and Optics

Properties of Waves - Stationary waves in open pipes

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

In groups, learners are guided to:
- 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

- Written tests - Oral questions - Problem-solving exercises

Waves and Optics

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

In groups, learners are guided to:
- 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
- Research applications in astronomy for measuring galaxy movements
- Discuss medical imaging applications like Doppler sonography
- Explore traffic radar and speed camera applications

Why does the pitch of a siren change as an ambulance passes by?
How is Doppler effect used in medicine and traffic control?

- 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
- Spotlight Physics Grade 10 pg. 175
- Digital resources
- Charts showing Doppler applications

- Oral questions - Observation - Written assignments
- Research presentations - Written tests - Oral questions

Waves and Optics

Radioactivity - Meaning of radioactivity and related terms

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

In groups, learners are guided to:
- 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

- Oral questions - Written assignments - Group discussions

Waves and Optics

Radioactivity - Stability of isotopes and atomic structure
Radioactivity - Types of radiations (alpha, beta, gamma)

By the end of the lesson, the learner should be able to:
- Explain atomic structure in relation to radioactivity
- Describe how neutron-proton ratio affects nuclear stability
- Connect isotope stability to carbon dating of archaeological artifacts

In groups, learners are guided to:
- Discuss the composition of atoms: protons, neutrons, and electrons
- Explain why a 1:1 neutron-proton ratio leads to stability
- Illustrate unstable nuclides using diagrams

How does the neutron-proton ratio affect nuclear stability?

- Spotlight Physics Grade 10 pg. 180
- Digital resources
- Charts showing atomic structure
- Spotlight Physics Grade 10 pg. 181
- Charts showing radiation types

- Written tests - Oral questions - Diagram labelling

Waves and Optics

Radioactivity - Properties of alpha and beta particles

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

In groups, learners are guided to:
- 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

- Written tests - Oral questions - Comparison tables

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
- Write nuclear equations for beta and gamma decay
- Explain how beta decay changes a neutron to a proton
- Relate beta decay to carbon-14 dating of organic materials

In groups, learners are guided to:
- 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
- Discuss beta decay: neutron changes to proton and electron
- Write nuclear equation for carbon-14 decaying to nitrogen-14
- Explain gamma decay as energy release without change in mass or atomic number

Why are gamma rays not deflected by electric or magnetic fields?
How do beta and gamma decay differ from alpha decay?

- 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
- Digital resources
- Periodic table

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

Waves and Optics

Radioactivity - Uranium-238 decay series

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

In groups, learners are guided to:
- 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

- Chart interpretation - Written tests - Oral questions

Waves and Optics

Radioactivity - Detection using electroscope and GM tube
Radioactivity - Cloud chambers and nuclear emulsion plates

By the end of the lesson, the learner should be able to:
- Describe detection of radioactive emissions using electroscope
- Explain the structure and operation of a Geiger-Müller tube
- Relate GM tube operation to radiation monitoring in nuclear power plants

In groups, learners are guided to:
- Demonstrate how a charged electroscope loses charge near a radioactive source
- Discuss the components and operation of a GM tube
- Explain how ionization produces pulses counted by a scaler

How does a Geiger-Müller tube detect radiation?

- Spotlight Physics Grade 10 pg. 189
- Electroscope
- Diagrams of GM tube
- Spotlight Physics Grade 10 pg. 190
- Diagrams of cloud chambers
- Digital resources

- Practical demonstration - Oral questions - Written tests

Waves and Optics

Radioactivity - Meaning and demonstration of half-life

By the end of the lesson, the learner should be able to:
- Explain the meaning of half-life
- Demonstrate half-life concept using water draining from a burette
- Relate half-life to how long radioactive waste remains dangerous

In groups, learners are guided to:
- Define half-life as time for half the radioactive atoms to decay
- Perform water drainage experiment to simulate radioactive decay
- Plot a graph of volume against time and determine half-life

How long does it take for half of a radioactive sample to decay?

- Spotlight Physics Grade 10 pg. 193
- Burette
- Retort stand
- Stop clock

- Practical assessment - Graph plotting - 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

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 significance of half-life in various fields
- Describe applications in medicine, environment, and nuclear power
- Relate half-life to planning cancer treatment doses and nuclear waste storage

In groups, learners are guided to:
- 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 significance in nuclear medicine and carbon dating
- Explain importance in nuclear waste management
- Research applications in pharmacokinetics and safety regulations

How do we calculate the half-life of a radioactive substance?
Why is understanding half-life important in medicine and nuclear power?

- 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

- Written tests - Problem-solving exercises - Graph interpretation
- Research presentations - Written tests - Oral questions

Waves and Optics

Radioactivity - Nuclear fusion and applications

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

In groups, learners are guided to:
- Discuss how light nuclei combine to form heavier nuclei
- Explain why fusion requires extremely high temperatures
- Compare energy released in fusion versus fission reactions

Why does nuclear fusion power the sun and stars?

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

- Written tests - Comparison tables - Oral questions

Waves and Optics

Radioactivity - Applications in medicine and industry

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

In groups, learners are guided to:
- 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

- Research presentations - Written tests - 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

In groups, learners are guided to:
- 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

Electricity and Magnetism

Origin of charges in a material
The law of electrostatics
Methods of charging conductors - Induction and Contact
Methods of charging conductors - Separation and charge distribution
Electric field patterns
The electroscope - Structure, charging and discharging

By the end of the lesson, the learner should be able to:
- Define electric charge and state its SI unit
- Describe the atomic structure and origin of charges in materials
- Relate static electricity to everyday experiences like clothes clinging after tumble drying
- Describe charging by separation method
- Illustrate charge distribution on conductors of various shapes
- Connect charge concentration at sharp points to lightning rod design

In groups, learners are guided to:
- Discuss with peers the origin of charges on materials (atom, nucleus, neutrons, protons and electrons)
- Use digital resources to search for information on atomic structure
- Perform experiments to demonstrate generation of static charges through rubbing plastic pen on woolen cloth
- Carry out activities to charge two spheres by separation method
- Discuss how charge distributes on spherical, pear-shaped and irregular conductors
- Draw diagrams showing charge distribution on different shaped conductors

How do materials acquire electric charges?
Why does charge concentrate at pointed ends of conductors?

- Spotlight Physics Learner's Book pg. 205
- Plastic pen, woolen cloth
- Small pieces of paper
- Digital resources
- 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
- 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

- Oral questions - Observation - Written assignments
- Observation - Written assignments - Diagram assessment

Electricity and Magnetism

Uses of electroscope
Applications - Spray painting, precipitators and photocopiers

By the end of the lesson, the learner should be able to:
- Describe uses of an electroscope
- Demonstrate testing for presence, type and quantity of charge
- Apply electroscope principles to quality control testing in manufacturing

In groups, learners are guided to:
- Perform experiments to test for presence of charge on a body
- Determine the type of charge using a charged electroscope
- Measure relative quantity of charge
- Test conducting and insulating properties of materials

How can an electroscope determine the type of charge on a body?

- Spotlight Physics Learner's Book pg. 219
- Gold-leaf electroscope
- Various charged materials
- Conductors and insulators for testing
- Spotlight Physics Learner's Book pg. 221
- Charts and diagrams
- Digital resources
- Videos on spray painting

- Practical assessment - Oral questions - Written tests

Electricity and Magnetism

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

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

In groups, learners are guided to:
- 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

- Oral questions - Written assignments - Group discussions

Electricity and Magnetism

Current and potential difference
Electromotive force and internal resistance
Ohm's law - Verification and calculations

By the end of the lesson, the learner should be able to:
- Define electric current and potential difference with their SI units
- Measure current using ammeter and potential difference using voltmeter
- Relate current flow to water flow in pipes for practical understanding

In groups, learners are guided to:
- Set up simple circuits with cells, bulb, ammeter and voltmeter
- Discuss current as rate of flow of charge (I = Q/t)
- Discuss potential difference as work done per unit charge (V = W/Q)
- Measure and record current and voltage in circuits

What is the relationship between charge, current and potential difference?

- Spotlight Physics Learner's Book pg. 228
- Dry cells, cell holders
- Ammeter, voltmeter, bulb
- Connecting wires, switch
- 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

- Practical assessment - Oral questions - Written calculations

Electricity and Magnetism

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:
- Derive and apply the relationship E = I(R+r)
- Determine internal resistance graphically using V-I graph
- Apply EMF calculations to assess battery quality and performance
- Investigate the effect of temperature on resistance of conductors
- Define resistivity and apply ρ = RA/L
- Relate temperature effects to why light bulbs glow brighter when hot

In groups, learners are guided to:
- Derive E = IR + Ir mathematically
- Vary current in a circuit and record terminal voltages
- Plot graph of V against I to determine r from gradient and E from y-intercept
- Solve problems involving EMF and internal resistance
- Heat a coil of wire and measure resistance at different temperatures
- Plot R-T graphs for conductors and semiconductors
- Derive resistivity formula from R = ρL/A
- Calculate and compare resistivity of different materials

How can we determine internal resistance of a cell graphically?
How does temperature affect the resistance of a conductor?

- Spotlight Physics Learner's Book pg. 236
- Dry cells, ammeter
- Voltmeter, rheostat
- 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

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

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

In groups, learners are guided to:
- 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

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

In groups, learners are guided to:
- 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

- Written calculations - Circuit analysis - Oral questions

Electricity and Magnetism

Relationship of V, I and P - Power equations
Factors affecting heating effect of electric current

By the end of the lesson, the learner should be able to:
- Derive and apply power equations P = VI, P = I²R and P = V²/R
- Calculate power consumption of electrical devices
- Relate power ratings to energy efficiency of household appliances

In groups, learners are guided to:
- Discuss electrical power as rate of energy conversion
- Derive power equations from P = W/t and Ohm's law
- Calculate power in circuits using different formulas
- Compare power ratings of various appliances

What is the relationship between voltage, current and power?

- Spotlight Physics Learner's Book pg. 270
- Scientific calculators
- Power rating labels from appliances
- Worksheets
- Spotlight Physics Learner's Book pg. 273
- Heating coils, beaker
- Thermometer, stopwatch
- Ammeter, voltmeter, rheostat

- Written calculations - Oral questions - Problem-solving tests

Electricity and Magnetism

Applications of heating effect of electric current
Power rating and electrical energy calculations
Conductors, semiconductors, insulators and superconductors

By the end of the lesson, the learner should be able to:
- Describe applications of heating effect in electrical appliances
- Explain the working of electric heaters, kettles, iron boxes and fuses
- Relate heating applications to safe and efficient use of electrical devices at home
- Interpret power ratings on electrical appliances
- Calculate electrical energy consumption using E = Pt
- Apply energy calculations to reduce electricity bills at home

In groups, learners are guided to:
- Research on electrical appliances that use heating effect
- Classify appliances as heating devices, kitchenware or lighting devices
- Discuss the working of electric iron, kettle, heater and filament lamp
- Explain the function and selection of appropriate fuses
- 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

How is the heating effect of electric current applied in household appliances?
How do we calculate the cost of running electrical appliances?

- Spotlight Physics Learner's Book pg. 277
- Pictures of electrical appliances
- Fuses of different ratings
- Digital resources
- 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

- Oral questions - Written assignments - Research presentations
- Written calculations - Oral questions - Problem-solving tests

Electricity and Magnetism

Distinguishing materials using energy band theory
Effect of temperature on conductors and semiconductors
Intrinsic semiconductors and doping

By the end of the lesson, the learner should be able to:
- Explain energy band theory (valence band, conduction band, forbidden gap)
- Distinguish between conductors, semiconductors and insulators using band diagrams
- Connect energy bands to how LEDs produce light of specific colours

In groups, learners are guided to:
- Discuss the concept of valence band, conduction band and forbidden energy gap
- Draw energy band diagrams for conductors, semiconductors and insulators
- Compare the size of energy gaps in different materials
- Explain electron movement in terms of energy bands

How does energy band theory explain electrical conductivity?

- 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
- Models of crystal structures

- Diagram drawing - Oral questions - Written explanations

Electricity and Magnetism

N-type and p-type semiconductors
Applications of conductors and insulators

By the end of the lesson, the learner should be able to:
- Explain the formation of n-type and p-type semiconductors
- Identify majority and minority charge carriers in each type
- Relate n-type and p-type semiconductors to diode and transistor construction

In groups, learners are guided to:
- Discuss doping silicon with pentavalent atoms (P, As, Sb) to form n-type
- Draw diagrams showing electrons as majority carriers in n-type
- Discuss doping with trivalent atoms (B, Al, Ga) to form p-type
- Draw diagrams showing holes as majority carriers in p-type

How are n-type and p-type semiconductors formed?

- 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

- Diagram drawing - Oral questions - Written comparisons

Electricity and Magnetism
Environmental and Space Physics

Applications of semiconductors and superconductors
Application of conductors and insulators in car wiring system
Greenhouse Effect and Climate Change - Greenhouse effect and climate change in the environment

By the end of the lesson, the learner should be able to:
- Describe applications of semiconductors in electronics and sensors
- Describe applications of superconductors in modern technology
- Connect semiconductor applications to smartphones, computers, solar panels and medical equipment

In groups, learners are guided to:
- Research on semiconductor applications (transistors, diodes, LEDs, thermistors, solar cells)
- Discuss use of thermistors in temperature sensors and fire alarms
- Explain applications of superconductors (MRI machines, maglev trains, power transmission)
- Discuss future potential of superconductors

How are semiconductors used in modern electronic devices?

- Spotlight Physics Learner's Book pg. 293
- Electronic components
- Pictures of semiconductor devices
- Digital resources
- Spotlight Physics Learner's Book pg. 294
- Car wiring diagrams
- Samples of automotive cables
- Digital resources
- Resource persons (mechanics)
- Spotlight Physics Learner's Book Grade 10 pg. 297
- Clear plastic bottles/jars
- Thermometers
- Plastic wrap
- Digital devices

- Oral questions - Written assignments - Research presentations

Environmental and Space Physics

Greenhouse Effect and Climate Change - Physical drivers of climate change
Greenhouse Effect and Climate Change - Factors leading to greenhouse effect
Greenhouse Effect and Climate Change - Agricultural and livestock contributions
Greenhouse Effect and Climate Change - Role of ozone layer
Greenhouse Effect and Climate Change - Ozone depletion and climate change
Greenhouse Effect and Climate Change - Strategies for mitigating climate change

By the end of the lesson, the learner should be able to:
- Explain how greenhouse gases trap heat in the atmosphere
- Illustrate the process of heat absorption and re-emission by greenhouse gases
- Relate the greenhouse effect to temperature changes experienced in greenhouses and parked vehicles
- Explain the structure and location of the ozone layer
- Describe the role of ozone layer in protecting Earth from UV radiation
- Connect ozone layer protection to reduced cases of sunburns and skin conditions

In groups, learners are guided to:
- Study diagrams showing physical drivers of climate change
- Discuss with peers how greenhouse gases absorb and re-emit infrared radiation
- Use print or non-print media to search for more information on climate change drivers
- Use digital resources to search for information on ozone layer
- Study diagrams showing the ozone layer and its role
- Discuss the importance of ozone layer in protecting life on Earth

Why is the Earth warmer than it would be without greenhouse gases?
What would happen to life on Earth without the ozone layer?

- Spotlight Physics Learner's Book Grade 10 pg. 298
- Charts showing greenhouse effect
- Digital resources
- Spotlight Physics Learner's Book Grade 10 pg. 299
- Pictures of industrial activities
- Spotlight Physics Learner's Book Grade 10 pg. 300
- Charts showing greenhouse gas sources
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 301
- Diagrams of ozone layer
- Digital resources
- Charts on ozone depletion
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 302
- Pictures of renewable energy sources

- Oral questions - Group presentations - Written tests
- Oral questions - Written assignments - Group presentations

Environmental and Space Physics

Greenhouse Effect and Climate Change - Effects of climate change on environment
Introduction to Space Physics - Big Bang Theory

By the end of the lesson, the learner should be able to:
- Describe the impacts of climate change on weather patterns, water bodies and vegetation
- Analyse changes in local environment due to climate change
- Connect observed changes in local rivers and lakes to climate change effects

In groups, learners are guided to:
- Discuss the effects of climate change on global temperatures, weather patterns, water levels and vegetation
- Demonstrate effects of climate change in the immediate environment
- Initiate a school project to help reduce greenhouse gas emissions

How has climate change affected your local environment?

- Spotlight Physics Learner's Book Grade 10 pg. 305
- Pictures showing climate change effects
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 308
- Charts on Big Bang Theory
- Digital resources

- Observation - Oral questions - Project presentations

Environmental and Space Physics

Introduction to Space Physics - Stars, planets and satellites
Introduction to Space Physics - Asteroids, comets, meteors and galaxies
Introduction to Space Physics - Space exploration methods and telescopy
Introduction to Space Physics - Motion of planets around the sun
Introduction to Space Physics - Careers in space exploration

By the end of the lesson, the learner should be able to:
- Define celestial bodies and give examples
- Classify celestial bodies as stars, planets and satellites
- Relate the sun as a star to the light and heat we receive daily

In groups, learners are guided to:
- Study photos of celestial bodies in space
- Discuss the characteristics of stars, planets and satellites
- Use digital resources to search for types of celestial bodies

What celestial bodies can you observe in the night sky?

- Spotlight Physics Learner's Book Grade 10 pg. 309
- Photos of celestial bodies
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 311
- Pictures of comets and galaxies
- Digital resources
- Spotlight Physics Learner's Book Grade 10 pg. 312
- Lenses, manila paper, glue
- Pictures of telescopes
- Spotlight Physics Learner's Book Grade 10 pg. 316
- Models of solar system
- Charts on Kepler's laws
- Spotlight Physics Learner's Book Grade 10 pg. 318
- Career charts

- Observation - Oral questions - Written tests