CHAUNCY SCHOOL

SCIENCE DEPARTMENT

YEAR 8 REVISION BOOKLET

PHYSICS

PHYSICS TOPICS

Heat and Sound

Energy and Electricity

Forces and Motion

Unit 1- Heat and Sound

Heat Transfer

Heat always travels from hot to cold. There are three ways heat is transferred,

CONDUCTION, CONVECTION and RADIATION.

Conduction happens in solids:

Convection happens in fluids (liquids and air):

Radiation doesn’t need particles to travel. All hot objects produce radiation waves (also

known as infrared waves):

Exercise

The 3 ways of transferring energy are ________________, ________________ and

radiation.

Conduction-

This is the ______________ of heat energy through a ______________ from a

hotter part to a _____________ part. This happens without any movement of the

substance.

A substance is a _________ conductor of heat if the ____________ flows through it

easily. An example of a good conductor is ____________. A poor heat conductor is

called an _______________. An example of a good insulator is ___________.

wood good cooler transfer substance energy metal insulator

Convection-

This is the transfer of _________ energy through the movement of

______________ themselves. ____________ moves from ______________ areas

to cooler areas.

Liquids and ____________ can transfer heat by ______________ because the

_______________ can move around unlike the particles in a solid.

particles heat gases particles energy hotter convection

Radiation-

This is the transfer of heat energy by __________. Radiated heat can travel through

a ____________, an empty space with no particles in it.

This is why an ice cream will melt in the sun.

vacuum waves.

Match up the keyword with the definition:

Conduction

Measures the degree of hotness of an object.

Convection

The flow of energy from a hotter object to a

cooler object.

Radiation

The total energy an object possesses.

Temperature

Heat is transferred in solids by this process. It is

due to the vibration of particles.

Heat

Heat is transferred in fluids by this process. It

involves the movement of particles to transfer heat

energy.

Internal energy

Infrared radiation is when an object

radiates/emits heat energy.

Sound

Comparing light and sound

Hearing

Unit 2 – Energy and Electricity

Energy forms and energy changes

Generating Electricity

Energy resources

The Sun and energy resources

Forces and Motion – Unit 3

Forces

Friction

Turning Forces

Pressure