Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

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

Front

What happens during melting?

Back

Melting is the process where a solid turns into a liquid when heat is applied. For example, ice melts into water when heated.

Front

What happens during evaporation?

Back

Evaporation is the process where a liquid turns into a gas. For example, water evaporates into steam when heated.

Front

What is an example of condensation?

Back

Condensation is the process where a gas turns into a liquid. An example is water droplets forming on a cold glass.

Front

What state of matter has a definite shape?

Back

Solid has a definite shape and volume.

Front

What state of matter takes the shape of its container?

Back

Liquid takes the shape of the container it is in.

Front

What state of matter has no definite shape or volume?

Back

Gas has no definite shape or volume and expands to fill its container.

Front

What is an example of a chemical change in everyday life?

Back

An example of a chemical change is baking a cake, where ingredients react to form a new substance.

Front

What is the process of dissolving?

Back

Dissolving is when a solid (solute) mixes with a liquid (solvent) to form a solution. For example, sugar dissolving in water.