Revision for Ch 5 - Heat (S1G1)

This is a ____.
It is different from thermometers as it not only measures but records down the temperatures.

• thermometer

• datalogger with temperature sensor

• barometer

• hygrometer

Heat keeps us ____ when the weather is cold.

• cool

• warm

• hot

• chilly

___ is a measure of the degree of hotness of an object. It tells us how hot or cold something is.

• Temperature

• Pressure

• Volume

• Density

iron , water , oxygen gas

Which substance expands the most when heated to the same temperature?

• iron

• water

• oxygen gas

• mercury

The iced milo (gains / loses) heat. The iced milo becomes (warmer / colder) over time.

• gains heat, warmer

• loses heat, colder

• gains heat, colder

• loses heat, warmer

When a matter gains heat, it ________.

• contracts and becomes smaller

• expands and becomes bigger

• remains the same size

• melts and turns into liquid

When a matter loses heat, it ________.

• expands and becomes larger

• contracts and becomes smaller

• remains the same size

• melts and turns into liquid

What to do so that metal ball can pass through the metal ring?

• Heat the metal ball to expand it.

• Cool the metal ball.

• Increase the size of the metal ring.

• Use a different material for the ball.

This is bimetallic strip. What function does it have?

• It works like a switch and is used in thermostat which maintains temperature.

• It is used to measure humidity levels in the air.

• It serves as a conductor for electrical circuits.

• It acts as a heat sink in electronic devices.

___________ milk bottles with the use of heat kills germs.

• Sterilising

• Pasteurising

• Boiling

• Cleaning