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Drummond BGE Science > S1 - Waves and Heat (complete) > Flashcards

S1 - Waves and Heat (complete) Flashcards

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1
Q

Wave

A

A travelling vibration which transfers energy.

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2
Q

Give an example of a wave

A

Water, sound, light, radio, etc…

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3
Q

Amplitude

A

Height of a wave from middle to peak or trough.

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4
Q

Wavelength

A

Length of a complete wave.

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5
Q

Frequency

A

Number of waves per second.

(If waves shown in picture happen in 1 second, the frequency is 2 waves per second.)

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6
Q

What does the arrow show?

A

Amplitude

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7
Q

What does the arrow show?

A

Wavelength

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8
Q

Refraction

A

Change of a wave’s speed (and possibly direction) when it changes medium.

(medium = air, glass, plastic, etc; what the light travels through)

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9
Q

How will light refract through this block?

A
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10
Q

How will light refract through this block?

A
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11
Q

How will light refract through this prism?

A
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12
Q

Convex lens

A

Lens which converges light to a focus.

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13
Q

Concave lens

A

Lens which spreads light out.

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14
Q

Name this type of lens

A

Concave

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15
Q

Name this type of lens

A

Convex

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16
Q

How will a concave lens refract light?

A

The rays bend away from each other and never cross.

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17
Q

How will a convex lens refract light?

A

The rays bend towards each other and come to a focus.

18
Q

Short sight

A

Can see close objects clearly but not distant ones.

19
Q

Long sight

A

Can see distant objects clearly but not close ones.

20
Q

What type of lens is used to correct long sight?

A

Convex

21
Q

What type of lens is used to correct short sight?

A

Concave

22
Q

Rainbow

A

White light spread out showing it is a mixture of 7 colours.

23
Q

List the 7 colours of the rainbow (in correct order): red, …..

A

red, orange, yellow, green, blue, indigo, violet.

24
Q

The total “rainbow” of all light, of which visible light is just a tiny part.

A

Electromagnetic spectrum

25
Q

Finish the electromagnetic spectrum (in correct order):

gamma rays, X-rays, ultraviolet, visible light, …

A

infra-red, microwaves, radio.

26
Q

Finish the electromagnetic spectrum (in correct order):

gamma rays, X-rays, …………………, microwaves, radio.

A

ultraviolet, visible light, infra-red

27
Q

Finish the electromagnetic spectrum (in correct order):

……… visible light, infra-red, microwaves, radio.

A

gamma rays, X-rays, ultraviolet,….

28
Q

A form of energy due to the vibrations or movement of matter particles.

A

Heat

29
Q

A measure of the average heat energy of the particles in an object.

A

Temperature

30
Q

Heat flows in solids via ________.

A

conduction

31
Q

Conduction works like this:

  • Particles __________ the heat source start to vibrate more.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in solids.
A

Conduction works like this:

  • Particles nearest the heat source start to vibrate more.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in solids.
32
Q

Conduction works like this:

  • Particles nearest the heat source start to ____________.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in solids.
A

Conduction works like this:

  • Particles nearest the heat source start to vibrate more.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in solids.
33
Q

Conduction works like this:

  • Particles nearest the heat source start to vibrate more.
  • They _________ into their ______________ particles and make them vibrate more.
  • This is how heat travels in solids.
A

Conduction works like this:

  • Particles nearest the heat source start to vibrate more.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in solids.
34
Q

Conduction works like this:

  • Particles nearest the heat source start to vibrate more.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in ___________.
A

Conduction works like this:

  • Particles nearest the heat source start to vibrate more.
  • They bump into their neighbouring particles and make them vibrate more.
  • This is how heat travels in solids.
35
Q

Heat flows in liquids and gases via ________.

A

convection

36
Q

When air or water heat up, they become _____________, so they travel upwards.

A

When air or water heat up, they become less dense, so they travel upwards.

37
Q

When air or water heat up, they become less dense, so they travel _____________.

A

When air or water heat up, they become less dense, so they travel upwards.

38
Q

What type of heat transfer does this show?

A

Convection

39
Q

Heat travels across a vacuum via _______.

A

radiation

40
Q

What type of objects are good at radiating and absorbing heat?

(2 things)

A

Dark and dull

(e.g. black T-shirt)

41
Q

What type of objects are poor at radiating and absorbing heat?

(2 things)

A

Light and shiny

(e.g. shiny tin can)

42
Q

Give one way to reduce heat loss from a house

A

Any one of:

double glazing, draught excluders, loft insulation, cavity insulation, closed curtains, carpets, etc.

Drummond BGE Science (12 decks)

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