Formation of a New Substance

Front

What is a physical change?

Back

A physical change is a change that does not create a new substance. Examples include changes in state, shape, or size.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of a new substance. Examples include baking, rusting, and souring of milk.

Front

What indicates a chemical change has occurred?

Back

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

Front

What happens to sugar when it is heated?

Back

When sugar is heated, it can undergo a chemical change, turning black and producing new substances.

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 baking a cake.

Front

What does it mean if a substance changes color?

Back

A color change often indicates that a chemical change has occurred.

Front

What happens to milk when it goes sour?

Back

When milk goes sour, a chemical change occurs, resulting in the formation of new substances.

Front

What is the difference between a physical and chemical change?

Back

A physical change does not create a new substance, while a chemical change does.

Front

What is an indicator of a chemical reaction?

Back

An indicator of a chemical reaction can be a color change, gas release, or temperature change.