Ch10-Transfering And Transforming Energy

Question 1

Absorbed

Answer 1

Taken in

Question 2

Bioluminescent

Answer 2

describes living things that release light energy

Question 3

Conduction

Answer 3

transfer of heat through collisions between particles

Question 4

Convection

Answer 4

transfer of heat through the flow of particles

Question 5

Compression

Answer 5

the process of pushing a material into itself

Question 6

Conductor

Answer 6

A material that easily allows heat to flow through

Question 7

Chemical energy

Answer 7

potential energy derived from chemical reactions

Question 8

Elastic energy

Answer 8

the potential energy stored in a stretched elastic material

Question 9

Electrical energy

Answer 9

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

Question 10

Efficiency

Answer 10

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

Question 11

Frequency/Pitch

Answer 11

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

Question 12

Gravitational energy

Answer 12

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

Question 13

Heat energy

Answer 13

Energy derived from heat of hot substances

Question 14

Insulator

Answer 14

a material that is a poor conductor of heat

Question 15

Incandescent

Answer 15

describes objects that emit light when they are hot

Question 16

Kinetic energy

Answer 16

energy due to the motion of an object

Question 17

Luminous

Answer 17

Realising it’s own light

Question 18

Non-luminous

Answer 18

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

Question 19

Potential energy

Answer 19

energy that has the potential to do work and so the energy is ‘stored’, such as gravitational energy, elastic energy and chemical energy

Question 20

Rarefaction

Answer 20

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

Question 21

Radiation

Answer 21

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

Question 22

Reflected

Answer 22

Bounced off

Question 23

Law of conservation of energy

Answer 23

a 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 24

Sound energy

Answer 24

Sound is the movement of energy through substances in longitudinal (compression/rarefaction) waves

Question 25

Thermal energy transfer

Answer 25

Energy transfer that involves radiation, conduction and convection

Question 26

Transmitted

Answer 26

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

Question 27

Vibrations

Answer 27

repeated fast, back-and-forth movements