CP3

Question 1

Atomic energy

Answer 1

A name used to describe enemy when it is stored inside atoms.

Question 2

Chemical energy

Answer 2

A name used to describe energy when it is stored in chemical substances.

Question 3

Elastic potential energy

Answer 3

A name used to describe energy when it is stored in stretched or squashed things that can change back to their original shapes.

Question 4

Gravitational potential energy

Answer 4

A name used to describe objects when it is stored in objects in high places that can fall down.

Question 5

Joule

Answer 5

A unit for measuring energy.

Question 6

Kinetic energy

Answer 6

A name used to describe energy when it is stored in moving things.

Question 7

Law of conservation of energy

Answer 7

The idea that energy can never be created or destroyed, only transferred from one store to another.

Question 8

Stanley diagram

Answer 8

A diagram showing energy transfers, where the width of each arrow is proportional to the amount of energy it represents.

Question 9

System

Answer 9

A set of things being studied (eg. a kettle, the water in it and its surroundings is a simple system).

Question 10

Thermal energy

Answer 10

A name used to describe energy when it is stored in hot objects. The hotter something is, the more thermal energy it has.

Question 11

Dissipated

Answer 11

Spread out.

Question 12

Efficiency

Answer 12

A way of saying how much energy something wastes. A more efficient machine wastes less energy.

Question 13

Lubrication

Answer 13

To reduce friction by putting a substance between two surfaces.

Question 14

Absorb

Answer 14

To soak up or to take in.

Question 15

Conduction

Answer 15

The way energy is transferred through solids by heating. Vibrations are passed on from particle to particle.

Question 16

Convection

Answer 16

The movement of particles in a fluid (gas or liquid) depending on their temperature. Hotter, less dense regions rise, and cooler, denser regions sink.

Question 17

Emit

Answer 17

To give out.

Question 18

Fluid

Answer 18

A liquid or gas.

Question 19

Thermal conductivity

Answer 19

A measure of how easily energy can pass through a material by heating. A material with a low conductivity is a good insulating material.

Question 20

Insulation

Answer 20

A material that does not allow something, e.g. heat or electricity to pass through it.

Question 21

Radiation

Answer 21

A way of transferring energy by heating.

Question 22

Thermal insulator

Answer 22

A material that does not allow energy to be transferred through it easily by heating.

Question 23

Climate change

Answer 23

Changes that will happen to the weather as a result of global warming which is caused by the increased amount of carbon dioxide in the atmosphere.

Question 24

Fossil fuel

Answer 24

A fuel formed from the dead remains of organisms over millions of years.

Question 25

Non-renewable

Answer 25

Any energy resource that will run out because we cannot easily renew our supplies of it.

Question 26

Nuclear fuel

Answer 26

A radioactive metal such as uranium. Nuclear fuels are used in nuclear power stations to generate electricity.

Question 27

Renewable energy

Answer 27

An energy resource that will never run out.

Question 28

Uranium

Answer 28

A radioactive metal that can be used as a nuclear fuel.

Question 29

Biofuel

Answer 29

A fuel made from plants or animals waste.

Question 30

Hydroelectricity

Answer 30

Electricity generated by moving water turning turbines and generators.

Question 31

Solar cell

Answer 31

A flat plate that uses energy transferred by the light to produce electricity.

Question 32

Solar energy

Answer 32

Energy from the sun.

Question 33

Tidal power

Answer 33

Generating electricity using the movement of the tides.

Question 34

Wind turbine

Answer 34

A kind of windmill that generates electricity using energy transferred by the wind.