Physical and Chemical Changes

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. Examples include changes in state, shape, or size.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a rearrangement of atoms and is often accompanied by energy changes, color changes, or the production of gas.

Front

Give an example of a physical change.

Back

Melting ice cream is an example of a physical change, as it changes from solid to liquid without altering its chemical composition.

Front

Give an example of a chemical change.

Back

Corroding metal is an example of a chemical change, as it involves a reaction with oxygen that alters the metal's chemical structure.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in the formation of new substances.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the environment, forming iron oxide (rust).

Front

Is breaking glass a physical or chemical change?

Back

Breaking glass is a physical change because it alters the shape and size of the glass without changing its chemical composition.

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

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

Back

The main difference is that a physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.