physical and chemical changes #1

Front

What is a chemical change?

Back

A chemical change is a process where new substances are formed, involving a change in the chemical composition of the original substance.

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

Is cutting a log into small pieces a chemical change?

Back

No, cutting a log into small pieces is a physical change.

Front

What happens during a chemical change?

Back

During a chemical change, the atoms in the original substances rearrange to form new substances.

Front

Is burning wood a chemical change?

Back

Yes, burning wood is a chemical change because it produces ash and gases.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is vinegar reacting with baking soda to produce carbon dioxide gas.

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

What is an indicator of a chemical change?

Back

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

Front

Is dissolving sugar in water a chemical change?

Back

No, dissolving sugar in water is a physical change because the sugar can be recovered.