Unit 2: Matter Review

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout. Examples include saltwater and air.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the composition is not uniform throughout. Examples include salad and sand.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen and oxygen.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).

Front

What is the main evidence of a chemical change?

Back

The main evidence of a chemical change is the production of a new substance.

Front

What is condensation?

Back

Condensation is the process by which a gas turns into a liquid. An example is water vapor turning into liquid water.

Front

What is vaporization?

Back

Vaporization is the process by which a liquid turns into a gas. An example is boiling water turning into steam.

Front

What is melting point?

Back

The melting point is the temperature at which a solid becomes a liquid. It is a physical property of the substance.

Front

What is solidification?

Back

Solidification is the process by which a liquid turns into a solid. An example is water freezing into ice.

Front

What is sublimation?

Back

Sublimation is the process by which a solid turns directly into a gas without becoming a liquid. An example is dry ice turning into carbon dioxide gas.