Chemical & Physical changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, such as heat or light.

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

Example of a chemical change?

Back

Rusting of iron is an example of a chemical change.

Front

Example of a physical change?

Back

Melting of ice is an example of a physical change.

Front

What happens during a chemical change?

Back

During a chemical change, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance may change, but its chemical identity remains the same.

Front

Is dissolving sugar in water a chemical or physical change?

Back

Dissolving sugar in water is a physical change because the sugar can be recovered by evaporating the water.

Front

Is burning wood a chemical or physical change?

Back

Burning wood is a chemical change because it produces new substances like ash and smoke.

Front

What is an example of a chemical change in nature?

Back

Photosynthesis in plants is an example of a chemical change, where carbon dioxide and water are converted into glucose and oxygen.

Front

What is an example of a physical change in nature?

Back

The melting of snow in spring is an example of a physical change.