Amplify Thermal Energy Chapter 2

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

Front

What happens to molecules when a substance is heated?

Back

When a substance is heated, its molecules move faster and spread apart.

Front

What happens to molecules when a substance is cooled?

Back

When a substance is cooled, its molecules move slower and come closer together.

Front

What is the boiling point of water in degrees Celsius?

Back

The boiling point of water is 100℃.

Front

What is the freezing point of water in degrees Celsius?

Back

The freezing point of water is 0℃.

Front

How does temperature affect the state of matter?

Back

Increasing temperature can change solids to liquids (melting) and liquids to gases (evaporation). Decreasing temperature can change gases to liquids (condensation) and liquids to solids (freezing).

Front

What is the average of a set of numbers?

Back

The average is the sum of all the numbers divided by the count of the numbers.

Front

If the average of a set of numbers is 6, what does that tell you?

Back

It means that the total sum of the numbers divided by how many numbers there are equals 6.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion. The faster an object moves, the more kinetic energy it has.

Front

What is the relationship between temperature and kinetic energy?

Back

As temperature increases, the kinetic energy of the molecules increases.