Matter chemistry Test

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas is a sign that a chemical reaction has occurred.

Front

Is rust on an iron bar an example of a chemical change?

Back

True, rust is a chemical change.

Front

What state of matter spreads out to fill its container?

Back

Gas spreads out to fill its container.

Front

Rank these in order from least dense to most dense: Solid, Liquid, Gas.

Back

Gas, Liquid, Solid.

Front

What is density?

Back

Density is a physical property that measures how much mass is contained in a given volume.

Front

What happens to the molecules in a solid?

Back

In a solid, molecules are closely packed together and vibrate in place.

Front

What happens to the molecules in a liquid?

Back

In a liquid, molecules are close together but can move past one another.

Front

What happens to the molecules in a gas?

Back

In a gas, molecules are far apart and move freely.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed without changing its identity.

Front

What is a chemical property?

Back

A chemical property describes a substance's ability to undergo a chemical change.