S1 - Waves and Heat (complete)

Question 1

Wave

Answer 1

A travelling vibration which transfers energy.

Question 2

Give an example of a wave

Answer 2

Water, sound, light, radio, etc…

Question 3

Amplitude

Answer 3

Height of a wave from middle to peak or trough.

Question 4

Wavelength

Answer 4

Length of a complete wave.

Question 5

Frequency

Answer 5

Number of waves per second.

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

Question 6

What does the arrow show?

Answer 6

Amplitude

Question 7

What does the arrow show?

Answer 7

Wavelength

Question 8

Refraction

Answer 8

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

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

Question 9

How will light refract through this block?

Answer 9

Question 10

How will light refract through this block?

Answer 10

Question 11

How will light refract through this prism?

Answer 11

Question 12

Convex lens

Answer 12

Lens which converges light to a focus.

Question 13

Concave lens

Answer 13

Lens which spreads light out.

Question 14

Name this type of lens

Answer 14

Concave

Question 15

Name this type of lens

Answer 15

Convex

Question 16

How will a concave lens refract light?

Answer 16

The rays bend away from each other and never cross.

Question 17

How will a convex lens refract light?

Answer 17

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

Question 18

Short sight

Answer 18

Can see close objects clearly but not distant ones.

Question 19

Long sight

Answer 19

Can see distant objects clearly but not close ones.

Question 20

What type of lens is used to correct long sight?

Answer 20

Convex

Question 21

What type of lens is used to correct short sight?

Answer 21

Concave

Question 22

Rainbow

Answer 22

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

Question 23

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

Answer 23

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

Question 24

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

Answer 24

Electromagnetic spectrum

Question 25

Finish the electromagnetic spectrum (in correct order):

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

Answer 25

infra-red, microwaves, radio.

Question 26

Finish the electromagnetic spectrum (in correct order):

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

Answer 26

ultraviolet, visible light, infra-red

Question 27

Finish the electromagnetic spectrum (in correct order):

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

Answer 27

gamma rays, X-rays, ultraviolet,….

Question 28

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

Answer 28

Heat

Question 29

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

Answer 29

Temperature

Question 30

Heat flows in solids via ________.

Answer 30

conduction

Question 31

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.

Answer 31

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.

Question 32

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.

Answer 32

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.

Question 33

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.

Answer 33

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.

Question 34

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 ___________.

Answer 34

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.

Question 35

Heat flows in liquids and gases via ________.

Answer 35

convection

Question 36

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

Answer 36

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

Question 37

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

Answer 37

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

Question 38

What type of heat transfer does this show?

Answer 38

Convection

Question 39

Heat travels across a vacuum via _______.

Answer 39

radiation

Question 40

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

(2 things)

Answer 40

Dark and dull

(e.g. black T-shirt)

Question 41

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

(2 things)

Answer 41

Light and shiny

(e.g. shiny tin can)

Question 42

Give one way to reduce heat loss from a house

Answer 42

Any one of:

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