Energy transfers

TargetTo know the main types of energy and

examples of where they occur.

Wednesday, May 3, 2023

Energy types

• The pictures on this The pictures on this page will give you a page will give you a series of clues of the series of clues of the eight main types of eight main types of energy – what are energy – what are they?they?

Energy types

• 1. Heat – stored in the 1. Heat – stored in the moving particles in a moving particles in a substance.substance.

• 2. Light – given off by 2. Light – given off by luminous objects.luminous objects.

• 3. Sound – given off 3. Sound – given off by vibrating objects.by vibrating objects.

• 4. Electrical – carried 4. Electrical – carried by moving charges.by moving charges.

Energy types

• 5. Kinetic – in any 5. Kinetic – in any moving object.moving object.

• 6. Gravitational 6. Gravitational potential – in any potential – in any object above ground.object above ground.

• 7. Elastic – in 7. Elastic – in stretched springs and stretched springs and rubber bands.rubber bands.

• 8. Chemical – in food, 8. Chemical – in food, fuels and batteries.fuels and batteries.

Questions

Core Science 1 page 236 and 237Core Science 1 page 236 and 237

Energy

Moving energy

Stored energy

Kinetic

Electrical

Heat

Light

Sound

Elastic

Chemical

Gravitational potential

Unit of energy

Joules

Main types of energy

Specific energy types

Car

CD player

Examples

Toaster

Lamp

Radio

Spring

Mars bar

Ball on table

Energy transfers

TargetTo know about energy conversions.

Wednesday, May 3, 2023

Energy conversions

• Energy is never Energy is never destroyed – it is destroyed – it is simply converted from simply converted from one form to another. one form to another.

• You must be able to You must be able to recognise the energy recognise the energy change in many change in many different situations.different situations.

Energy conversions – describe the energy conversions shown here.

Energy conversions – describe the energy conversions shown here.

Electrical

Kinetic + heat + sound

Electrical

Kinetic + sound

Chemical

Heat + light

Electrical

Energy conversions – describe the energy conversions shown here.

Energy resources

• An energy resource is An energy resource is somewhere where somewhere where energy is stored for energy is stored for later use – like petrol later use – like petrol or coal. or coal.

• Most energy resources Most energy resources originally come from originally come from the sun and many have the sun and many have been stored for been stored for millions of years.millions of years.

Energy resources look at these pictures to see how energy resources are created.

Key words• 1. Heat1. Heat• 2. Light2. Light• 3. Sounds3. Sounds• 4. Electrical4. Electrical• 5. Kinetic5. Kinetic• 6. Gravitational6. Gravitational

• 7. Temperature7. Temperature• 8. Conversions8. Conversions• 9. Resources9. Resources

Energy quiz

1.1. In this picture the In this picture the energy change is energy change is from – chemical to from – chemical to electrical ( T or F)electrical ( T or F)

2.2. In this picture the In this picture the energy change is energy change is from – electrical to from – electrical to light only. (T or F)light only. (T or F)

Energy quiz

3.3. The spring has kinetic energy The spring has kinetic energy stored in it. (T or F).stored in it. (T or F).

4.4. In this picture the boy is In this picture the boy is losing gravitational potential losing gravitational potential energy as he climbs down the energy as he climbs down the cliff. (T or F).cliff. (T or F).

5. The girl is 5. The girl is usingusing kinetic kinetic energy to make her move. (T energy to make her move. (T or F).or F).

Energy quiz

1.1. In this picture the In this picture the energy change is energy change is from – chemical to from – chemical to electrical electrical (T RUE)(T RUE)

2.2. In this picture the In this picture the energy change is energy change is from – electrical to from – electrical to light only. light only. (FALSE)(FALSE)

Energy quiz

3.3. The spring has kinetic energy The spring has kinetic energy stored in it. stored in it. (FALSE).(FALSE).

4.4. In this picture the boy is In this picture the boy is losing gravitational potential losing gravitational potential energy as he climbs down the energy as he climbs down the cliff. cliff. (TRUE).(TRUE).

5. The girl is 5. The girl is usingusing kinetic kinetic energy to make her move. energy to make her move. (FALSE).(FALSE).

Heat and temperature

• Temperature is a measure Temperature is a measure of the of the level of heatlevel of heat in an in an object – the amount of heat object – the amount of heat depends on:depends on:

• 1. Temperature1. Temperature• 2 Amount of substance 2 Amount of substance • 3. Type of substance.3. Type of substance.