Energy

Question 1

transfer of heat through collisions between particles

Answer 1

conduction

Question 2

a material that is a poor conductor of heat

Answer 2

insulators

Question 3

transfer of heat through the flow of particles

Answer 3

convection

Question 4

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

Answer 4

radiation

Question 5

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

Answer 5

radiant heat

Question 6

describes plants that lose their leaves during autumn and winter

Answer 6

deciduous

Question 7

releasing its own light

Answer 7

luminous

Question 8

describes objects that emit light when they are hot

Answer 8

incandescent

Question 9

describes living things that release light energy

Answer 9

bioluminescent

Question 10

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

Answer 10

scattered

Question 11

different colours that combine to make up white light; they are separated in rainbows

Answer 11

visible spectrum

Question 12

separation of the colours that make up white light. Each colour is bent differently when it enters or leaves a glass prism.

Answer 12

dispersion

Question 13

the radiant energy such as radio waves, infrared, visible light, X-rays and gamma rays released by magnetic or electric fields

Answer 13

electromagnetic radiation

Question 14

complete range of wavelengths of energy radiated as electric and magnetic fields

Answer 14

electromagnetic spectrum

Question 15

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

Answer 15

radio waves

Question 16

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

Answer 16

infra-red radiation

Question 17

releasing its own light

Answer 17

luminous

Question 18

describes objects that emit light when they are hot

Answer 18

incandescent

Question 19

describes living things that release light energy

Answer 19

bioluminescent

Question 20

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

Answer 20

non-luminous

Question 21

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

Answer 21

scattered

Question 22

different colours that combine to make up white light; they are separated in rainbows

Answer 22

visible spectrum

Question 23

separation of the colours that make up white light. Each colour is bent differently when it enters or leaves a glass prism.

Answer 23

dispersion

Question 24

electromagnetic radiation the radiant energy such as radio waves, infrared, visible light, X-rays and gamma rays released by magnetic or electric fields

Answer 24

electromagnetic radiation

Question 25

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

Answer 25

radio waves

Question 26

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

Answer 26

infra-red radiation

Question 27

invisible radiation similar to light but with a slightly higher frequency and more energy

Answer 27

ultraviolet radiation

Question 28

high energy electromagnetic waves that can be transmitted through solids and provide information about their structure

Answer 28

X-rays

Question 29

high energy electromagnetic radiation produced during nuclear reaction

Answer 29

gamma rays

Question 30

repeated fast, back-and-forth movements

Answer 30

vibrations

Question 31

the process of pushing a material into itself

Answer 31

compression

Question 32

in sound waves, the layers of air particles that are spread apart (between compressions

Answer 32

rarefactions

Question 33

vibrations of particles in the air

Answer 33

sound wave

Question 34

number of vibrations in one second, or the number of wavelengths passing in one second

Answer 34

frequency

Question 35

unit of frequency; its abbreviation is Hz. One hertz is equal to one vibration every second.

Answer 35

hertz

Question 36

the highness or lowness of a sound. The pitch that you hear depends on the frequency of the vibrating air.

Answer 36

pitch

Question 37

distance between two neighbouring crests or troughs of a wave. This is the distance between two particles vibrating in step.

Answer 37

wavelength

Question 38

maximum distance that a particle moves away from its undisturbed position

Answer 38

amplitude

Question 39

longer-lasting sound caused by repeated reflection from hard surfaces

Answer 39

reverberation