8th Grade Sci. End of Matter Unit Review

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to undergo a specific chemical change, such as tarnishing.

Front

What is the Law of Conservation of Matter?

Back

The principle stating that the mass of the reactants must equal the mass of the products in a chemical reaction.

Front

What is an element?

Back

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

Front

What is a mixture?

Back

A combination of two or more substances where each retains its own properties and can be separated by physical means.

Front

What is a suspension?

Back

A heterogeneous mixture in which solid particles are suspended in a liquid or gas and can settle over time.

Front

What happens to the mass of a candle when it burns?

Back

The mass remains the same; it is conserved, even though it may change form.

Front

What is a compound?

Back

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

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is a solution?

Back

A homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).

Front

What is the significance of separating oil and vinegar in salad dressing?

Back

It demonstrates that oil and vinegar are a mixture, as they can be physically separated.