Unit 1: Matter and Change Review

Front

What is a heterogeneous mixture?

Back

A mixture that has a non-uniform composition, where the individual components can be seen and separated, such as oil and water.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout, where the individual components are not distinguishable, such as salt water.

Front

What is matter?

Back

Anything that has mass and takes up space.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as burning wood.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice.

Front

What is a pure substance?

Back

A material that has a constant composition and consistent properties throughout, such as distilled water.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together, such as sodium chloride (table salt).

Front

What is the difference between a solid, liquid, and gas?

Back

Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither definite shape nor volume.

Front

What is density?

Back

The mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the process of dissolving?

Back

The process in which a solute is mixed with a solvent to form a solution, such as dissolving sugar in water.