Physical Science Review

Front

What is a Physical Change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition. Examples include cutting, freezing, and melting.

Front

What is a Chemical Change?

Back

A change that results in the formation of new chemical substances. Examples include rusting, burning, and cooking.

Front

What is a Mixture?

Back

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What flows in a wire?

Back

Electrons flow in a wire, which are negatively charged particles that carry electric current.

Front

What is the symbol for a switch?

Back

The symbol for a switch is typically represented as a break in a line with a dot or a small circle.

Front

What happens when water freezes?

Back

Water undergoes a physical change when it freezes into ice, maintaining its chemical composition (H2O).

Front

What is an example of a Physical Change?

Back

Cutting an orange into wedges is an example of a physical change.

Front

What is an example of a Chemical Change?

Back

Burning wood is an example of a chemical change, as it produces ash and smoke.

Front

What is the difference between a Physical Change and a Chemical Change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Front

What is an Atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.