HEAT TRANSFER

• A

• B

• C

• D

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

NGSS.MS-PS1-4

Which material is the best choice to prevent their hands from getting too hot?

• aluminium

• copper

• steel

• wood

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Two metal cans are identical, except that one has a shiny silver outer surface and the other has a

dull black outer surface.

They each have 300 g of water at 80 °C sealed inside them. They are

both in a vacuum, in the darkness of outer space.

How does the temperature of the water in each one change?

• Neither one will cool down.

• The water in the black can cools more slowly than that in the shiny can.

• The water in the shiny can cools more slowly than that in the black can.

• They both cool down at the same rate.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The metal surface of a kettle is hot.

What happens to the cool air outside the kettle when it comes into contact with the hot kettle?

• The density of the air decreases and the air falls.

• The density of the air decreases and the air rises.

• The density of the air increases and the air falls.

• The density of the air increases and the air rises.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

Some hot water is sealed inside a metal can. The can is in a vacuum in outer space.

The hot

water slowly cools down.

How does the thermal energy escape into space?

• by conduction then convection

• by conduction then radiation

• by evaporation then convection

• by evaporation then radiation

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

Four thermometers, with their bulbs painted different colours, are placed at equal distances from

a radiant heater.

Which thermometer shows the slowest temperature rise when the heater is first switched on?

• matt black

• matt white

• shiny black

• shiny white

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

NGSS.MS-PS1-4

Which statement about convection is not correct?

• A It enables water in a pan on a cooker to get evenly heated.

• B It happens in liquids and gases.

• C It means that heat rises.

• D It occurs because the density of a fluid decreases when it is heated.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

In which type of substance are free electrons involved in the transfer of thermal energy?

• all liquids

• all solids

• metals only

• plastics only

Tags

NGSS.MS-PS3-4

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

Which statement about convection currents is correct?

• Convection currents occur because, when cooled, liquids contract and become more dense.

• Convection currents occur because, when warmed, liquids expand and become more dense.

• Convection currents only occur in liquids.

• Convection currents only occur in solids and liquids.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6