Unit 3: The Solar System and energy
Energy — HIA International - Grade 6 Revision Notes & Topical Questions
5 min read 8 parts Lesson 10 of 14 2 quizzes
Lesson summary
3.5 Energy — HIA INTERNATIONAL notes: State what energy is, name the energy stores and transfers, and explain why some stores last longer than others.Energy — something that must be changed or transferred in order to do somethingUnit — energy is measured in joules (J)Stored or tr…
- Stored or transferred
- Kinetic energy
- Gravitational potential
- Electrical
- Chemical energy
- Thermal energy
Section 1 of 8What energy is
Energy
- Energy something that must be changed or transferred in order to do something
Unit
- Unit energy is measured in joules (J)
Stored or transferred
- Stored or transferred energy can be held in a store or moved from one place to another by a transfer
Kinetic energy
- Kinetic energy the energy of movement
Section 2 of 8Energy stores
| Energy store | Description |
|---|---|
| Kinetic | energy stored due to the movement of an object |
| Chemical | energy stored in food, batteries and fuels such as wood, oil and coal |
| Thermal | heat energy stored in hot objects |
| Elastic potential | energy stored when things are stretched or squeezed to change their shape |
| Gravitational potential | energy stored when an object is lifted away from a source of gravity |
Section 3 of 8Energy transfers
| Energy transfer | Description |
|---|---|
| Thermal | heat energy transferred from hot objects to colder objects |
| Electrical | the flow of current in a circuit transfers electrical energy |
| Sound | energy transferred from vibrating objects |
| Light | visible energy from luminous objects, which give out their own light |
Section 4 of 8Stores and transfers in a bus
Kinetic
- Kinetic the bus is moving
Chemical
- Chemical the bus carries fuel
Thermal
- Thermal the engine is hot
Sound
- Sound the engine makes noise
Gravitational potential
- Gravitational potential the bus is going uphill
Elastic
- Elastic the tyres get squeezed
Electrical
- Electrical the lights are on
Section 5 of 8Stores that last a long time
1Chemical energy
- Chemical energy easy to store, for example in uncooked rice, in a battery, or in coal and crude oil formed millions of years ago
2Gravitational potential energy
- Gravitational potential energy easy to store, for example water lifted into a tank by a pump
Section 6 of 8Stores that last a short time
Thermal energy
- Thermal energy hot objects eventually cool down and lose their store of thermal energy
Kinetic energy
- Kinetic energy more difficult to store than chemical or gravitational potential energy, because a moving object such as a tennis ball eventually stops
Section 7 of 8Key terms
| Term | Meaning |
|---|---|
| Energy | Something that must be changed or transferred in order to do something. |
| Joule (J) | The unit used to measure energy. |
| Kinetic energy | The energy stored due to the movement of an object. |
| Chemical energy | Energy stored in food, batteries and fuels. |
| Elastic potential energy | Energy stored when something is stretched or squeezed. |
| Gravitational potential energy | Energy stored when an object is lifted away from a source of gravity. |
| Luminous | Giving out its own light. |
Section 8 of 8Exam technique
1
Saying energy is a substance that is used up — energy is changed or transferred
2
Mixing up joules with other units — energy is measured in joules (J)
3
Saying thermal energy can be stored for a long time — hot objects cool down
4
Thinking only moving objects have energy — chemical, thermal, elastic and gravitational potential stores also hold energy
Marked practiceQuizzes for this lesson
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