Semester Exam 12/13

Front

What is at the center of every atom?

Back

A nucleus.

Front

What does the nucleus of an atom contain?

Back

Protons and neutrons.

Front

What is the variable that is changed on purpose in an experiment?

Back

Independent Variable.

Front

In a solution, what is the substance that is dissolved called?

Back

Solute.

Front

What happens to a snowman on a sunny day?

Back

It melts.

Front

What are the three main subatomic particles in an atom?

Back

Protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the phase change from liquid to gas called?

Back

Evaporation.

Front

What is the phase change from gas to liquid called?

Back

Condensation.