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Year 8 Science > Cahpter 10 Transferring And Transforming Energy > Flashcards

Cahpter 10 Transferring And Transforming Energy Flashcards

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1
Q

Energy

A

Describes anything that can do work

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2
Q

Law of conservation of energy

A

Energy cannot be created or destroyed or destroyed only transferred

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3
Q

Gravitational energy

A

Potential energy of an object elevated above the ground

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4
Q

Elastic energy

A

Energy stored by an elastic object that is stretched such as a spring or a rubber band

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5
Q

Chemical energy

A

Energy stored in chemical that when reacted together such as burning reactions realize heat sound or light

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6
Q

Nuclear energy

A

Energy stored in the nucleus of atoms that releases energy slowly such as in a nuclear for quickly such as in a nuclear explosion

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7
Q

Electrical energy

A

Energy supplied to homes by power lines and available to your appliances via power outlets in the home

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8
Q

Kinetic energy

A

Energy processed by objects that are moving

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9
Q

Heat energy

A

Energy that causes objects to gain temperature

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10
Q

Light energy

A

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

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11
Q

Sound energy

A

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

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12
Q

Potential energy

A

Stored energy that when realeaed is converted to other form such as kinetic sound heat or light energy

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13
Q

Efficiency

A

A fraction of a energy supplied to a device as a useful energy.it is usually expressed as a percentage

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14
Q

Conduction

A

Transfer of heat through collisions between particles

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15
Q

Insulator

A

A material that is a poor conductor of heat

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16
Q

Convection

A

Transfer of heat through the flow of particles

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17
Q

Radiation

A

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

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18
Q

Radiant heat

A

Heat transferred by radiation as from the sun to earth

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19
Q

Reflected

A

Bounced off

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20
Q

Transmitted

A

Passed through something such as light or sound passing through air.

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21
Q

Absorbed

A

Taken in

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22
Q

Deciduous

A

Describing plants that lose there leaves during autumn or winter

23
Q

Luminous

A

Realising its own light

24
Q

Incandescent

A

Describes an object that light when it is hot

25
Q

Bioluminescent

A

Describes living things that realises light energy

26
Q

Non luminous

A

A object that does not produce light it self

27
Q

Scattered

A

Describe light sent in many directions by small particales in a substance

28
Q

Visible spectrum

A

Different colours that combine to create a white light this separates rainbows

29
Q

Dispersion

A

Separation of colours that make up white light,

30
Q

Electromagnetic radiation

A

A radiant energy such as radiation waves which is then realised by a magnetic force of electric field

31
Q

Electromagnetic spectrum

A

Complete length of wavelengths of energy radiated as electric and magnetic fields

32
Q

Radio waves

A

Low energy electromagnetic waves with a much lower frequency no longer wavelength than visible light

33
Q

Infra-red radiation

A

Invisible radiation emitted by all warm objects

34
Q

Ultraviolet radiation

A

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

35
Q

X rays

A

Electromagnetic waves that can be transmitted through solids and provide information

36
Q

Rays

A

Narrow bean of light

37
Q

Concaves

A

Refer to a lenses that is curved donwards

38
Q

Conveys

A

Refers to a lens that is curved outwards

39
Q

Focal point

A

The point when the light rays close in towards a point

40
Q

Lateral inversion

A

Sideways reversal of images in a mirror

41
Q

Refraction

A

Change in the speed of light as it passes

42
Q

Normal

A

Line drawn perpendicular to a surface

43
Q

Image

A

Image of an object

44
Q

Vibration

A

Back and forth movement

45
Q

Compression

A

Process of pushing a material into itself

46
Q

Rarefactions

A

Particularly spread apart

47
Q

Sound waves

A

Vibrations of partials in the air

48
Q

Hertz

A

Unit of frequency

49
Q

Frequency

A

Number of vibrations in one secound

50
Q

Pitch

A

The highness and the lowness of a sound

51
Q

Wavelength

A

Distance between two neighbouring crest

52
Q

Amplitude

A

Maximum distance that a particle moves away

53
Q

Reverberation

A

Longer lasting sound

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