8th Grade Sci. End of Matter Unit Review

Front

What is the total mass of a solution when 15g of salt is dissolved in 115g of water?

Back

130g

Front

What is a substance called when two or more substances combine but each retains its own properties?

Back

Mixture

Front

What type of change occurs when lighting a match?

Back

Chemical reaction

Front

What properties classify a substance as a metal?

Back

High melting and boiling points, conducts electricity, shiny, solid at room temperature, can be hammered flat.

Front

What is brass classified as, since it is made of two metals melted together?

Back

A homogeneous mixture.

Front

What is the definition of a compound?

Back

A substance formed when two or more elements chemically bond together.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition.