Energy

Question 1

Electrical energy

Answer 1

the energy made available by the flow of electric charge through a conductor

Question 2

Gravitational potential energy

Answer 2

energy stored due to the height of an object above a base level

Question 3

Chemical energy

Answer 3

potential energy derived from chemical reactions

Question 4

Elastic potential energy

Answer 4

describes a material that is able to return to its original size after being stretched

Question 5

Nuclear energy

Answer 5

the energy stored at the centre of atoms, the tiny particles that make up all substances. Nuclear energy can be released from the radioactive metals uranium or plutonium, and transformed into electrical energy in a nuclear power station.

Question 6

Efficiency

Answer 6

the fraction of energy supplied to a device as useful energy. It is usually expressed as a percentage.

Question 7

Law of conservation of energy

Answer 7

law that states that energy cannot be made or lost. However, energy can be transformed from one type to another or transferred from one object to another.

Question 8

Conduction

Answer 8

transfer of heat through collisions between particles

Question 9

Insulator

Answer 9

material that is a poor conductor of heat

Question 10

Convection

Answer 10

transfer of heat through the flow of particles

Question 11

Radiation

Answer 11

method of heat transfer that does not require particles to transfer heat from one place to another

Question 12

Radiant heat

Answer 12

heat transferred by radiation, as from the sun to the Earth

Question 13

Reflected

Answer 13

Bounce off

Question 14

Transmitted

Answer 14

passed through something, such as light or sound passing through air

Question 15

Absorbed

Answer 15

Taken in

Question 16

Deciduous

Answer 16

describes plants that lose their leaves during autumn and winter

Question 17

Luminous

Answer 17

Releasing its own light

Question 18

Incandescent

Answer 18

describes objects that emit light when they are hot

Question 19

Bioluminescent

Answer 19

describes living things that release light energy

Question 20

Non-luminous

Answer 20

describes objects that do not emit their own light, but can be seen by reflected light

Question 21

Scattered

Answer 21

describes light sent in many directions by small particles within a substance

Question 22

Conduction

Answer 22

transfer of heat through collisions between particles

Question 23

Insulator

Answer 23

material that is a poor conductor of heat

Question 24

Convection

Answer 24

transfer of heat through the flow of particles

Question 25

Radiation

Answer 25

method of heat transfer that does not require particles to transfer heat from one place to another

Question 26

Radiant heat

Answer 26

heat transferred by radiation, as from the sun to the Earth

Question 27

Reflected

Answer 27

Bounce off

Question 28

Transmitted

Answer 28

passed through something, such as light or sound passing through air

Question 29

Absorbed

Answer 29

Taken in

Question 30

Deciduous

Answer 30

describes plants that lose their leaves during autumn and winter

Question 31

Luminous

Answer 31

Releasing its own light

Question 32

Incandescent

Answer 32

describes objects that emit light when they are hot

Question 33

Bioluminescent

Answer 33

describes living things that release light energy

Question 34

Non-luminous

Answer 34

describes objects that do not emit their own light, but can be seen by reflected light

Question 35

Scattered

Answer 35

describes light sent in many directions by small particles within a substance