Chemical and Physical 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 changing its chemical composition. Examples include bending, crushing, or melting.

Front

Give an example of a physical change.

Back

An example of a physical change is bending a piece of metal.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves making or breaking bonds between atoms.

Front

Give an example of a chemical change.

Back

An example of a chemical change is rust forming on iron.

Front

What happens to the substance in a physical change?

Back

In a physical change, the substance may change its form or appearance, but its chemical identity remains the same.

Front

What happens to the substance in a chemical change?

Back

In a chemical change, the substance transforms into one or more different substances with new chemical properties.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

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 are some indicators of a physical change?

Back

Indicators of a physical change include changes in shape, size, or state of matter (like melting or freezing).