Chemical Interactions 6 Eng / Span

Front

What happens to particles when substances are heated?

Back

The particles move faster.

Front

What happens to particles when substances are cooled?

Back

The particles get farther apart.

Front

What is contraction in gases?

Back

Contraction is when the volume of a gas decreases as it gets cold.

Front

What occurs to atoms during a chemical reaction?

Back

Atoms rearrange to form new substances, and mass remains the same.

Front

Which of the following is not evidence of a chemical reaction?

Back

Substance melts.

Front

What is a chemical reaction?

Back

A process where substances combine or break apart to form new substances.

Front

What is kinetic energy?

Back

The energy that particles have due to their motion.

Front

What is a precipitate?

Back

A solid that forms from a liquid solution during a chemical reaction.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not alter the substance's chemical composition, while chemical changes do.

Front

What is an example of a chemical change?

Back

Rust forming on iron.