7th grade Science

Front

What is a characteristic of a physical change?

Back

Change in state.

Front

What is the main difference between evaporation and boiling?

Back

Evaporation occurs at any temperature, while boiling occurs at a specific temperature.

Front

What happens to water molecules when water boils?

Back

The molecules speed up as the kinetic energy increases and the molecules move farther apart from one another.

Front

Energy of motion is which type of energy?

Back

Kinetic energy.

Front

What happens to the kinetic energy of particles as a solid melts into a liquid?

Back

It increases.

Front

What is evaporation?

Back

The process where liquid turns into vapor at any temperature.

Front

What is boiling?

Back

The process where liquid turns into vapor at a specific temperature.

Front

What is kinetic energy?

Back

The energy an object has due to its motion.

Front

What is potential energy?

Back

The stored energy in an object due to its position or state.

Front

What happens to the temperature of a substance during a phase change?

Back

The temperature remains constant during a phase change.