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Science > Physics revision > Flashcards

Physics revision Flashcards

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1
Q

What two types of waves are there

A

Transversal longitudinal

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2
Q

What is the equation for distance

A

Distance=speed of sound x time

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3
Q

Transversal

A

Water waves and electro magnet waves

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4
Q

What is the speed of sound in air

A

340 m/s

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5
Q

Longitudinal

A

Sound wave

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6
Q

An echo is a

A

Sound reflection

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7
Q

Transverse waves occure when

A

oscillations are perpendicular or at right angles (90°) to the direction of travel.

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8
Q

Longitudinal waves are

A

oscillations which occur parallel to the direction of travel.

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9
Q

What does sound need to travel through

A

A medium

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10
Q

The speed of sound in gas is

A

Very slow

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11
Q

The more rigid a medeum is the

A

Higher the speed of sound travelling through it

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12
Q

The more compressible a medium

A

The lower the speed of sound travelling through it

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13
Q

Solids are

A

Rigid

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14
Q

Gases are

A

Compressable

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15
Q

Liquids are

A

More rigid and less compressable then gases (in the middle)

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16
Q

What do we call a sound wave which has reflected off a wall?

A

Echo

17
Q

What is frequency

A

The number of sound waves that happen in one second

18
Q

What is frequency measures in

A

Hertz

19
Q

A high pitched sound means

A

The particles of vibrating very quickly

20
Q

Sounds above 20,000 HZ it’s called

A

Ultrasound

21
Q

Sound below 20 HZ is called

A

Intrasound

22
Q

Frequency effect sounds

A

Pitch

23
Q

Light travels as

A

Transverse waves

24
Q

can light travel in a vacuum

A

Yes

25
Q

Objects that do not allow light to transmit through them are called

A

opaque

26
Q

Objects that look light through them are called

A

Transparent

27
Q

Objects that scater light are called

A

Translucent

28
Q

When does light change speed?

A

When it passes through different medium or substances

29
Q

When light changes speed what is it known as?

A

A refraction ray

30
Q

Which colour has the lowest frequency?

A

Red

31
Q

What is a red object doing?

A

Reflecting red and absorbing all the other colours

32
Q

Is white light reflecting all colours or absorbing or colours?

A

Reflecting.

33
Q

When something is pitch black, it means it is.

A

Absorbing All colours

34
Q

Independent variable is the variable

A

You change in an experement

35
Q

The dependent variable is the variable that is

A

measured in an experiment.

36
Q

Control variables are the variables that are

A

kept the same in an experiment.
Control variables help you to measure

37
Q

What’s the difference between continuosand discrete data

A

Continuous is measured and discrete is counted

38
Q

Draw line graphs when data is

A

Continuous/is measured

39
Q
A

Science (3 decks)

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