PS.5.1.3 (5.P.3.2) #6: Schoolnet (Heating & Cooling)

Front

What is the process of changing a solid to a liquid called?

Back

Melting.

Front

What happens to concrete when temperatures rise?

Back

It expands, and gaps are provided to prevent cracking.

Front

Why does water expand when it freezes?

Back

Water molecules arrange themselves in a crystalline structure, which takes up more space.

Front

What can happen to water pipes in winter if the water inside freezes?

Back

The water expands, increasing pressure, which can cause the pipes to break.

Front

Why is it important to heat plastic before molding it?

Back

Heating plastic makes it more malleable and easier to shape.

Front

What is thermal expansion?

Back

The increase in volume of a substance due to an increase in temperature.

Front

What is the freezing point of water?

Back

0 degrees Celsius (32 degrees Fahrenheit).

Front

What is the boiling point of water?

Back

100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure.

Front

What is the term for the change from liquid to solid?

Back

Freezing.

Front

What is the term for the change from gas to liquid?

Back

Condensation.