Heat, Temperature, and Thermal Expansion

Front

What is heat?

Back

Heat is a form of energy that is transferred between objects due to a temperature difference.

Front

What is temperature?

Back

Temperature is a measure of how hot or cold something is, usually measured in degrees Celsius (°C) or Fahrenheit (°F).

Front

What is thermal expansion?

Back

Thermal expansion is the increase in volume of a substance when it is heated.

Front

What is thermal contraction?

Back

Thermal contraction is the decrease in volume of a substance when it is cooled.

Front

What is the unit of measurement for heat energy?

Back

Heat energy is measured in Joules.

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.

Front

What is an example of thermal expansion?

Back

Sidewalks cracking in hot weather due to expansion.

Front

What is an example of thermal contraction?

Back

Water freezing in a freezer.

Front

What type of energy is heat energy?

Back

Heat energy is a type of thermal energy.