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year 9 science > Waves > Flashcards

Waves Flashcards

1
Q

Unit of measurement used to measure energy

A

Joule

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2
Q

The substance through which a wave moves

A

Medium

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3
Q

The point at which a wave is at its maximum upwards value

A

Crest

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4
Q

The point at which a wave is at its minimum downwards value.

A

Trough

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5
Q

The distance from a point on a wave until it repeats itself on the next wave (corresponding point). Eg. Crest to crest.

A

Wavelength

unit of measurement: (metre)

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6
Q

The number of waves per second

A

Frequency (f)

Unit of measurement: hertz (Hz)

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7
Q

The maximum height of a wave from its rest position

A

Amplitude (A)

Unit of measurement: (metre)

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8
Q

The time for a particle to move through one complete wave cycle.

A

Period (T)

Unit of measurement: (second)

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9
Q

A rapid and continuous back and forth up and down movement

A

Vibration

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10
Q

Use the relationship between speed, frequency and wavelength to perform simple calculations

A

V=f(wavelength)

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11
Q

Waves that need a medium to travel in

A

Mechanical wave

Ex: sound wave, water wave

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12
Q

To continue through

A

Propagate

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13
Q

Particles in this type of wave travel at right angles to the direction of energy propagation

A

Transverse waves

Ex: electromagnetic radiation (emr), water

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14
Q

Particles in this type of wave travel back and forth in the same plane as the direction of energy propagation

A

Longitudinal waves

Ex: sound

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15
Q

Energy that travels as waves at the speed of light. EMR does not need a medium in which too propagate

A

Electromagnetic radiation (emr)

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16
Q

Label the seven main regions electromagnetic spectrum. Indicate which end of the spectrum has the highest frequency (shortest wavelength)

A 
Low frequency-long wavelength
Radio
Microwaves 
Infra-red
Visible light
Ultra-violet 
X-Ray's 
Gamma rays
High frequency-short wavelength
17
Q

A fundamental quantity that can only be identified in terms of transfers from place to place or transmissions from form to form

A

Energy

18
Q

A disturbance that moves through time and space carrying energy

A

Wave

year 9 science (6 decks)

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