Physics Unit 1

Question 1

What is temperature a measure of?

Answer 1

Heat

Question 2

What are the units of temperature?

Answer 2

°c and °F

Question 3

What is heat a measure of?

Answer 3

Energy

Question 4

What are the units of heat energy?

Answer 4

Joules (KJ/kilojoules)

Question 5

Explain what happens when an object expands.

Answer 5

The particles move further apart

Question 6

Explain what happens when an object contracts.

Answer 6

Particles move closer together

Question 7

How does heat energy transfer through a liquid?

Answer 7

By heating it

Question 8

What is evaporation?

Answer 8

Liquid turning into gas

Question 9

What is condensation?

Answer 9

Gas turning into liquid

Question 10

What factors increase the rate of evaporation?

Answer 10

Temperature and wind speed

Question 11

Describe an investigation you could do in the lab to demonstrate increased rate of evaporation.

Answer 11

By attaching a cotton bud to a temperature probe, test the temperature before and after a couple minutes. Then repeat with a fan

Question 12

What is a luminous object?

Answer 12

An object that produces light on its own

Question 13

What type of materials let light through easily?

Answer 13

Transparent

Question 14

What is refraction?

Answer 14

The change in direction when light passes through one medium to another

Question 15

What happens when white light passes through a prism?

Answer 15

It shows a spectrum of colours

Question 16

List the primary colours of light.

Answer 16

Red, green and blue

Question 17

List the secondary colours of light.

Answer 17

Magenta, cyan and yellow

Question 18

If you are wearing a red jumper, what colour will it appear in magenta light?

Answer 18

Red

Question 19

What is frequency. (Sound)

Answer 19

The number of hertz per second, the number of waves produced per second

Question 20

What is amplitude?

Answer 20

The highest point of a wave