Flashcard on 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.

Front

What is a chemical change?

Back

A chemical change is a process that involves the transformation of one or more substances into different substances, resulting in the formation of new chemical compounds.

Front

What is a typical sign of a physical change?

Back

Change in shape, size, or state of matter.

Front

What is an example of a physical change?

Back

Evaporation of water.

Front

What happens during boiling water?

Back

Boiling water is a physical change where water changes from liquid to gas (steam) without changing its chemical composition.

Front

What is the main characteristic of a chemical change?

Back

The formation of a new substance.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and gases.

Front

What is not a chemical change?

Back

Dissolving sugar in water, as it can be reversed and does not form a new substance.

Front

What are some common indicators of a chemical change?

Back

Color change, temperature change, gas production, and formation of a precipitate.

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 the formation of new substances.