Energy Flashcards

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1
Q

What is energy

A

The ability to do something

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2
Q

Law of conservation

A

Energy cannot be created or lost but It can be transformed or transferred

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3
Q

Potential energy

A

Stored energy that gets converted

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4
Q

Gravitational energy

A

Potential energy of an object elavated above the ground

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5
Q

Elastic energy

A

Energy store by an elastic object that springs

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6
Q

Chemical energy

A

Stored in chemicals that when reacted together result in an action

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7
Q

Nuclear energy

A

Energy stored in the nucleus of atoms that slowly release energy

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8
Q

Electrical

A

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

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9
Q

Kinetic

A

Energy passed by loving object

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10
Q

Heat

A

Energy that causes an object to gain temperature

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11
Q

Light

A

Energy that may be released, for example when an object is hot

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12
Q

Sound

A

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

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13
Q

Efficiency

A

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

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14
Q

Conduction

A

Transfer of heat through collision between particles

Happens when objects are touching

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15
Q

Convection

A

Transfer of heat through flow of particles

Doesn’t require object to be touching

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16
Q

Radiation

A

Method of heat transfer that doesn’t require particles to transfer heat from one place to another

17
Q

Transmitter

A

Clear objects that allow heat to pass through them. Their temperature doesn’t quickly rise

18
Q

Absorb

A

Dark colour objects absorb light and radiant heat. Temperature quickly increases

19
Q

Reflected

A

Shiny/light coloured object reflect light & heat away

20
Q

Calling instuoatioj

A

Made from fibreglass batts or loose rockwool. Contains pockets of air and reduced heat loss

21
Q

Cavity wall instillation

A

A foam sprayer in between the walls

22
Q

Heavy curtains

A

Trap a still layer of air

23
Q

Double glazing windows

A

Two sheets of glass with an air pocket

24
Q

Cavity bricks

A

Have small holes to reduce heat

25
Q

Luminous

A

Give off it’s own light

26
Q

Incandescent

A

Emits light because they are hot

27
Q

Bioluminescent

A

Emit light without getting hot

28
Q

Non-luminous

A

Don’t emit there own light

29
Q

How can you see light

A

We can see light because if the particle in its way. The light then scatters allowing us to see it

30
Q

Scattered

A

Describes light sent in many different directions by small particle within a substance

31
Q

Visible spectrum

A

Different cologne that combine to make white light

32
Q

Dispersion

A

Separation of the colours

33
Q

Electromagnetic radiation

A

The radiant energy such as radio waves, x-rays, infrared, visible light and ga,ma rays realised by magnetic or electric field

34
Q

Electromagnetic spectrum

A

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

35
Q

Radio waves

A

Low energy waves that are used to communicate over long distances through radio, tv, mobile and so-fo

36
Q

Infrared

A

Invisible to human eye emitted to all objects and is sensed as heat

37
Q

Ultraviolet radiation

A

Invisible to eye ,gives vitamin d, cause sunburn, more energy than visible light

38
Q

X-rays

A

Hugh energy electromagnetic waves that can be transmitted thirty solids and provides information about their structure

39
Q

Gamma rays

A

Emitted by radioactive substances and larger stars. Produced when energy is lost from the nucleus of an atom