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JC Science > Physics Definitions > Flashcards

Physics Definitions Flashcards

1
Q

length

A

Straight line distance between two points

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2
Q

Area

A

Amount of surface that covers an object

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3
Q

Mass

A

Amount of matter in an object

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4
Q

Temperature

A

The measure of how hot or cold an object is

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5
Q

Volume

A

The amount of space an object takes up

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6
Q

Speed

A

Distance travelled in relation to the time taken to travel that distance

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7
Q

Velocity

A

Speed in a given direction

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8
Q

Density

A

How much mass is contained in a particular volume

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9
Q

Energy

A

The ability to do work

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10
Q

Power

A

The rate at which work is done

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11
Q

The principle of conservation of energy

A

Energy cannot be created nor destroyed only converted from one form to another

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12
Q

Conduction

A

Transfer of heat through a solid without the particles in the solid movie out of position

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13
Q

Convection

A

Transfer of heat through a liquid or gas when the molecules of the liquid or gas move upwards and carry the heat

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14
Q

Radiation

A

The transfer of heat in rays from a hot object without needing a medium to pass through

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15
Q

Latent heat

A

Causes a change in state of liquid gas or solid and not a change in temperature

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16
Q

Magnetic field

A

Space around a magnet where a magnetic force is detected

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17
Q

Pressure

A

The amount of force put on a certain area

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18
Q

Atmospheric pressure

A

Gases in the atmosphere being pulled down to earth by gravity

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19
Q

Force

A

Something that causes an object to move or change its velocity

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20
Q

Friction

A

A force preventing easy movement between two objects in contact

21
Q

Weight

A

A force due to gravity

22
Q

Eclipse

A

Occurs when the moon passes between the Sun and the Earth

23
Q

Luminous objects

A

Make and give out their own light

24
Q

Nonluminous object

A

Reflects light from another source

25
Q

Dispersion

A

Breaking of white light into its seven colours

26
Q

Reflection

A

Bouncing of light of the surface

27
Q

Mirror image

A

Laterally inverted image in a plane mirror

28
Q

Refraction

A

Bending of light as it passes from one medium to another

29
Q

Conductor

A

Substance that allows the charge to flow through it easily

30
Q

Insulator

A

Substance that does not allow charge to flow through it

31
Q

Series circuit

A

Two components are connected one after the other

32
Q

Parallel circuit

A

Current coming to the battery splits up and some goes through each component

33
Q

Current

A

Flow of charge

34
Q

Voltage

A

Current will flow between two points if there is a potential difference between them (push of electrons)

35
Q

Resistance

A

Opposes movement of electrons around the circuit

36
Q

Direct current

A

Flows in One Direction only

37
Q

Alternating-current

A

Flows in all directions

38
Q

Fuse

A

Deliberate weak link in a circuit that will melt if the current exceeds a preset value

39
Q

Diodes

A

Allow current to flow in One Direction only

40
Q

LEDs

A

Light Emitting Diodes

41
Q

LDRs

A

Light dependent resistors

42
Q

Nonbiodegradable

A

Do not break down in the environment

43
Q

Lever

A

Rigid object which is free to turn about a fixed point called a fulcrum

44
Q

Centre of gravity

A

The point through which all the weight of a particular object appears to act

45
Q

Wavelength

A

Distance from one crest of a wave to another

46
Q

Frequency

A

Number of waves passing a point in each second

47
Q

Amplitude

A

Amount of energy in a soundwave

48
Q

Pitch

A

How low or high a sound seems

49
Q

Ultrasound

A

High-pitched sound beyond range of human ear

JC Science (53 decks)

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