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. Examples include melting, freezing, and hammering wood.

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

Is hammering wood to build a treehouse a physical or chemical change?

Back

Physical change.

Front

What is photosynthesis?

Back

Photosynthesis is a chemical process used by plants to convert light energy into chemical energy, producing glucose and oxygen from carbon dioxide and water.

Front

Is photosynthesis a physical or chemical change?

Back

Chemical change.

Front

What happens during the rotting of bananas?

Back

During the rotting of bananas, chemical changes occur that break down the fruit's structure and produce new substances, such as gases and liquids.

Front

Is rotting bananas a physical or chemical change?

Back

Chemical change.

Front

What happens when pancakes cook?

Back

When pancakes cook, a chemical change occurs as the heat causes the ingredients to react and form new substances, resulting in a change in texture and flavor.

Front

Is cooking pancakes a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical change?

Back

An example of a physical change is grass growing, as it involves changes in size and shape without altering the chemical composition.