Energy I

Question 1

energy

Answer 1

A quantity that can be transferred/stored

Question 2

fuel

Answer 2

A material that contains a store of energy and can be burned (e.g. gas, oil, coal, petrol).

Question 3

joule (J)

Answer 3

The unit of energy, symbol J.

Question 4

kilojoules (kJ)

Answer 4

1,000 joules.

Question 5

coal

Answer 5

A fossil fuel formed from dead plants that have been buried underground over millions of years.

Question 6

oil

Answer 6

A thick black liquid formed underground from remains of prehistoric plants and animals that died millions of years ago. It is used to make fuels such as petrol and diesel, and many plastics.

Question 7

fair test

Answer 7

A controlled investigation in which only one variable is changed while others are kept the same.

Question 8

variable

Answer 8

A quantity that can change

Question 9

energy store

Answer 9

Collection of objects for which energy can be calculated.

Question 10

chemical store

Answer 10

Energy stored in fuels, food, and electrical batteries.

Question 11

gravitational potential energy (GPE)

Answer 11

Energy stored in an object because of its height above the ground.

Question 12

gravity

Answer 12

Force of attraction between two objects because of their mass

Question 13

elastic store

Answer 13

The energy store associated with objects that are deformed.

Question 14

kinetic store

Answer 14

The energy store associated with moving objects.

Question 15

thermal store

Answer 15

Energy in objects/systems when there is a temperature change

Question 16

electric current

Answer 16

A flow of electrons around a complete circuit.

Question 17

light

Answer 17

Electromagnetic radiation that comes from sources (like the Sun) and transfers energy.

Question 18

heating

Answer 18

Energy transfer process that changes the temperature or state of a material

Question 19

nuclear fusion

Answer 19

The process of joining hydrogen together in stars that releases energy.

Question 20

nuclear store

Answer 20

Energy store associated with the process of nuclear fusion

Question 21

energy transfer

Answer 21

Energy transfer by forces, electricity, heating, or waves.

Question 22

dissipated

Answer 22

When transferred energy is not useful/wasted.

Question 23

kinetic energy

Answer 23

Energy associated with moving objects

Question 24

pendulum

Answer 24

Any rigid body that swings about a fixed point.

Question 25

period

Answer 25

Time taken to complete one cycle of motion.

Question 26

elastic potential energy (EPE)

Answer 26

Energy stored in an elastic object that is deformed

Question 27

deform

Answer 27

To change shape

Question 28

elastic

Answer 28

A type of material that deforms but returns to its original shape when the applied force is removed.