Chapter 10: Transforming And Transferring Energy

Question 1

Energy

Answer 1

Describes anything “that can do work”

Question 2

Law of conservation of energy

Answer 2

Energy that cannot be created or destroyed, only transferred.

Question 3

Gravitational Energy

Answer 3

Potential energy of an object elevated above the ground

Question 4

Elastic Energy

Answer 4

Energy stored by a elastic object that is stretched, such as an elastic band.

Question 5

Chemical Energy

Answer 5

Energy stored in chemicals that when reacted together such as in burning reactions, release heat, sound or light.

Question 6

Nuclear Energy

Answer 6

Energy stored in the nucleus of atoms that can release energy slowly.

Question 7

Electrical Energy

Answer 7

Energy made available through the flow of charge through a conductor.

Question 8

Potential Energy

Answer 8

Stored Energy that when released, is converted to other forms such as kinetic,sound, heat or light energy,

Question 9

Kinetic Energy

Answer 9

Energy possessed by objects that are moving

Question 10

Heat Energy

Answer 10

Energy that causes objects to gain temperature.

Question 11

Light Energy

Answer 11

Energy that may be released for example when an object is hot or by a nuclear reaction in a star.

Question 12

Sound Energy

Answer 12

Energy carried by the air in the room and detected by the ear.

Question 13

Efficiency

Answer 13

The fraction of energy supplied to a device as useful energy.

Question 14

Conductors

Answer 14

The transferring of heat through collision between particles

Question 15

Insulator

Answer 15

A material which is a poor conductor

Question 16

Convection

Answer 16

Transfer of heat through the flow of particles

Question 17

Radiation

Answer 17

A method of heat transfer that does not require particles to transfer heat

Question 18

Radiant heat

Answer 18

Heat transferred by radiation as sun to earth.

Question 19

Deciduous

Answer 19

Describes plants which lose their leaves during autumn and winter.

Question 20

Luminous

Answer 20

Something which releases its own light

Question 21

Incandescent

Answer 21

Describes object which project light when hot.

Question 22

Bioluminescent

Answer 22

Describes living things that release light energy

Question 23

Non- luminous

Answer 23

Describes objects which don’t project their own light however they can be seen by reflected light.

Question 24

Scattered

Answer 24

Describes light which are sent in many directions.

Question 25

Rays

Answer 25

Narrow beams of light

Question 26

Concave

Answer 26

Referring to a lens that is curved inwards

Question 27

Convex

Answer 27

A lens which are bent outwards

Question 28

Focal point

Answer 28

The point where light rays close in towards a point.

Question 29

Lateral inversion

Answer 29

Sideway reversal of images in a mirror.

Question 30

Refraction

Answer 30

Change in the speed of light as it passes from one substance to another.

Question 31

Normal

Answer 31

A line drawn perpendicular to a surface at the point where light rays meet it.

Question 32

Image

Answer 32

Picture of an object

Question 33

Vibrations

Answer 33

Repeated fast, back and forth movements

Question 34

Compression

Answer 34

The process of pushing a material into itself

Question 35

Rarefactions

Answer 35

The layers of air particles which are spread apart in sound waves

Question 36

Sound waves

Answer 36

Vibrations of particles in the air

Question 37

Frequency

Answer 37

The number of vibrations in one second

Question 38

Hertz

Answer 38

The unit of frequency

Question 39

Pitch

Answer 39

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

Question 40

Wavelengths

Answer 40

The distance between two neighbouring compressions.

Question 41

Amplitude

Answer 41

The maximum distance a particle moves away from its position

Question 42

Reverberation

Answer 42

Longer lasting sound cause from repeated reflection from hard surfaces.