top of page

Physics Topics - Form Three

TOPIC 1: Applications of Vectors

1. Scalar and Vector Quantities

• Distinguish between scalar and vector quantities

• Add vectors using graphical method

• State the triangle and parallelogram laws of forces

2. Relative Motion

• Explain the concept of relative motion

• Calculate the relative velocity of two bodies

• Apply the concept of relative motion in daily life

3. Resolution of Vectors

• Explain the concept of components of a vector

• Resolve a vector into two perpendicular components

• Apply resolution of vectors in solving problems

TOPIC 2: Friction

1. Concept of Friction

• Explain the concept for friction

• Describe methods of reducing friction

2. Types of Friction

• Identify types of friction

• Determine limiting friction

3. Laws of Friction

• State laws of friction

• Determine the coefficient of friction

• Apply laws of friction in solving problems

TOPIC 3: Light

1. Reflection of Light from Curved Mirrors

• Distinguish between concave and convex mirrors

• Explain the terms principle, axis, pole, principle focus and radius of curvature as applied to curved mirrors

• Locate the images formed by a curved mirror

• Determine practically the focal length of a concave mirror

• Use Convex and concave mirrors in daily life

2. Refraction of Light

• Explain the concept of refraction of light

• Measure the angle of incidence and angle of refraction

• State the laws of refraction

• Determine the refraction index of a material

• Explain the concept of critical angle and total internal reflection of light

• Explain the occurrence of mirage

3. Refraction of Light by Rectangular Prism

• Trace the passage of light through a triangular prism

• Demonstrate the dispersion of white light

• Determine the angles of deviation and minimum deviation

• Construct a simple prism binocular

4. Colours of Light

• Explain the component of white light

• Recombine colours of white light

• Explain the appearances of coloured object under white light

• Identify primary, secondary and complementary colours of light

• Distinguish between additive and subtractive combination of colours

5. Refraction of Light by Lenses

• Distinguish between convex and concave lenses

• Explain the terms focal length, principle focus, principle axis and optical centre as applied to lenses

• Determine practically the focal length of a lens

• Locate the image formed by a lens

• Determine the position, size and nature of the image formed by lens

• Determine the magnification of the lens camera

• Determine the relationship between focal length (f) object distance (u) and image distance (v) as applied to Lenses

TOPIC 4: Optical Instruments

1. Simple Microscope

• Describe the structure of the simple microscope

• Describe the mode of action of a simple microscope

• Construct a simple microscope

2. Compound Microscope

• Describe the structure of a compound microscope

• Describe the mode of action of a compound microscope

• Determine the magnification of a compound microscope

• Mention uses of a compound microscope

3. Astronomical Telescope

• Describe the structure of an astronomical telescope

• Describe the mode of action of an astronomical telescope

• Determine the magnification of an astronomical telescope

• Mention uses of an astronomical telescope

• Construct a simple astronomical telescope

4. Projection Lantern

• Describe the structure of the projection lantern

• Describe the mode of action of a projection lantern

• Determine the magnification of a projection lantern

• Mention uses of a projection lantern

• Construct a simple projection lantern

5. The Lense Camera

• Describe the structure of the lens camera

• Describe the mode of action of the lens camera

• Determine the magnification of the lens camera

• Construct a simple lens camera

6. The Human Eye

• Describe the structure of the human eye

• Explain accommodation power of the human eye

• Identify the defects of the human eye

• Describe the correction of the defects of human eye

• Compare the human eye and the lens camera

TOPIC 5: Thermal Expansion

1. Thermal Energy

• Explain the concept of heat

• State the source of thermal energy in everyday life

• Distinguish between heat and temperature

2. Thermal Expansion of Solids

• Demonstrate expansion of solids

• Explain expansion of solids in terms of kinetic theory of matter

• Identify expansivity of different solids

• Explain the applications of expansion of solids in daily life

3. Thermal Expansion of Liquids

• Explain the apparent expansion of liquids

• Demonstrate the effect of heat on liquids

• Verify the anomalous expansion of water

• Explain the applications of expansion of liquids in everyday life

4. Thermal Expansion of Gases

• Explain the concept of thermal expansion of gases

• Investigate the relationship between volume and temperature of fixed mass of air at constant pressure

• Investigate the relationship between pressure and volume of a fixed mass of air at constant temperature

• Investigate the relationship between pressure and temperature of a fixed mass of air at constant volume

• Identify the general gas equation from the gas laws

• Explain absolute scale of temperature

• Convert temperature in degrees centigrade (celsius) to kelvin

• Explain standard temperature and pressure (S.T.P)

• Apply expansion of gas in daily life

TOPIC 6: Transfer Of Thermal Energy

1. Conduction

• Explain the concept of conduction of Heat

• Identify good and bad Conductors of Heat

• Explain how to minimise Heat losses due to Conduction

• Apply knowledge of conduction in daily life

2. Convection

• Explain the concept of convection of heat

• Explain convection in fluids in terms of kinetic theory of matter

• Explain how to minimise heat losses due to convection to daily life

• Apply knowledge of convection to daily life

• Explain the concept of radiation

• Identify good absorbers and emitters of radiant heat

• Minimize heat losses due to radiation

TOPIC 7: Measurement Of Thermal Energy

1. Heat Capacity

• Explain the factors which determine heat quality of a substance

• Determine the heat capacity

• Determine the specific heat capacity

2. Change of State

• Explain the behaviour of particles of matter by applying kinetic theory

• Determine experimentally the melting point of a substance from its cooling curve

• Demonstrate the effect of impurities on the freezing point and the boiling point of a substance

• Demonstrate the effect of pressure on the boiling point and freezing point of a substance

• Explain the phenomenon of regulation

• Give the concept of boiling and evaporation in respect to the kinetic theory of matter

• Demonstrate latent heat of fusion and vaporisation

• Describe the mechanism of refrigeration

TOPIC 8: Vapour And Humidity

1. Vapour

• Explain the process of evaporation of liquid

• Identify factors affecting evaporation of a liquid

• Distinguish between saturated and evaporation of a liquid

• Explain the effect of temperature on saturated vapour pressure (S.V.P) of a liquid

2. Humidity

• Explain the concept of humidity

• Explain the formation of dew

• Measure relative humidity

• Apply the knowledge of humidity in daily life

TOPIC 9: Thermal Current Electricity

1. Electromotive force (emf) and potential difference (pd)

• Explain the concept of electromotive force (emf) and potential difference (pd)

• State the SI units of electromotive force and potential difference

• Measure electromotive force of a cell and potential difference across a conductor

2. Resistance to Electric Current

• Explain the concept of electric current in a conductor

• Describe factors which determine the resistance of a conductor

• Determine the relationship between potential difference across the conductor and current

• Identify types of resistors

• Determine the equivalent resistance of more than two resistors in series and parallel

• Explain the mode of action of a Wheatstone bridge.

• Connect and analyse a simple electric circuit

3. Effects of an Electric Current

• Explain the mechanism of heating by electric current

• Describe factors which determine the quality of heat generated in a conductor due to a current

• Determine electrical power

• Interpret the power rating of electrical appliances

4. Electric Installation

• Explain the meaning of the letter E (Earthing) L (Live) and N (Neutral) in Electrical Wiring

• Describe the function of a fuse and a circuit breaker

• Perform wiring on a board

• Check and rectify electrical faults in domestic appliances

5. Cells

• Describe the mode of action of a dry cell (Leclanche)

• Determine voltage of combination of cells in series and parallel

• Identify the cell defects

• Describe the mode of action of lead-acid accumulator

• Explain the charging and discharging phenomenon of an accumulator

• Use cells and accumulators in daily life

bottom of page