7th Grade Midterm 2024 (Amplify Science)

Front

What is a gas?

Back

A gas does not have a visible shape because its molecules can move away from each other.

Front

What is condensation?

Back

The change of a substance from a gas to a liquid.

Front

True or False: An increase in energy will always cause a phase change?

Back

False

Front

What happens when energy is transferred out of a gas?

Back

Molecules move slower and start moving around each other.

Front

How do you balance the equation HgO ---> ?

Back

2HgO ---> 2Hg + O2.

Front

What is thermal energy?

Back

The energy that comes from the temperature of matter.

Front

What is kinetic energy?

Back

The energy of an object due to its motion.

Front

What is evaporation?

Back

The change of a substance from a liquid to a gas.

Front

What is freezing?

Back

The change of a substance from a liquid to a solid.

Front

What is a phase change?

Back

A transition of matter from one state to another, such as solid, liquid, or gas.