Unit 3: Matter Review

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes. Example: Rust forming on iron.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Example: Tearing paper.

Front

What happens to sugar when water temperature increases?

Back

The sugar will dissolve faster in warmer water.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change?

Back

Rust is produced when iron is exposed to oxygen and water.

Front

What is an example of a physical change?

Back

Sharpening a pencil is an example of a physical change.

Front

What does it mean for a substance to dissolve?

Back

To dissolve means to mix a solid into a liquid so that it becomes part of the liquid, forming a solution.

Front

What is the state of matter?

Back

The state of matter refers to the distinct forms that different phases of matter take on, primarily solid, liquid, and gas.

Front

What happens to solids when they are heated?

Back

As solids are heated, they may increase in temperature and can change state, such as melting into a liquid.

Front

What is the boiling point of water?

Back

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure.