24-25 Fall Final Review

Front

What is a pure substance that cannot be broken down into simpler substances by a chemical reaction?

Back

Element

Front

What type of change occurs when tearing a piece of paper?

Back

Physical change

Front

Which layer of the Earth is the newest?

Back

Layer 5

Front

What are signs of a chemical change?

Back

Forming a gas, change in temperature, producing a precipitate, color change.

Front

Which layer of the Earth is the oldest?

Back

Layer 1

Front

What is a substance made of two or more elements chemically combined?

Back

Compound

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 an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What is a precipitate?

Back

A solid that forms from a solution during a chemical reaction.