Heating and Cooling

Front

What is the process of increasing the temperature of a substance called?

Back

Heating

Front

What is the process of reducing the temperature of a substance called?

Back

Cooling

Front

What type of change occurs when a substance can return to its original state after a process, such as melting and freezing butter?

Back

Reversible change

Front

What type of change occurs when a substance cannot return to its original state after a process, such as cooking an egg?

Back

Non-reversible change

Front

What is the term for the process of a solid turning into a liquid due to heat?

Back

Melting

Front

What is the term for the process of a liquid turning into a solid due to cooling?

Back

Freezing

Front

What is an example of a reversible change involving water?

Back

Melting and freezing of ice

Front

What is an example of a non-reversible change involving food?

Back

Baking a cake

Front

What happens to the molecules of a substance when it is heated?

Back

The molecules move faster and spread apart.

Front

What happens to the molecules of a substance when it is cooled?

Back

The molecules move slower and come closer together.