8th Grade Matter Review

Front

What is the number of protons in an element with atomic number 7?

Back

7 protons

Front

What are soil, salad, and sugar water examples of?

Back

Mixtures

Front

What does a mixture of elements represent?

Back

A combination of two or more elements that are not chemically bonded.

Front

What happens to molecules as a substance is heated?

Back

They move faster, get farther apart, and may change state.

Front

What are some clues of a chemical change?

Back

Fizzing, foaming, and change in color.

Front

What is an element?

Back

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

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

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

Back

A physical change alters the form of a substance, while a chemical change alters its chemical composition.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.