Stickler Week 17

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 melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and spoiling food.

Front

Is melting ice cream a physical or chemical change?

Back

Melting ice cream is a physical change.

Front

What happens to salt when it is added to water?

Back

The salt dissolves in the water.

Front

Which of the following does NOT dissolve in water: salt, sugar, pepper, or coffee?

Back

Pepper does NOT dissolve in water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the burning of wood.

Front

What is an example of a physical change?

Back

An example of a physical change is the melting of ice.

Front

What happens to food when it spoils?

Back

When food spoils, it undergoes a chemical change.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not change the substance's chemical identity, while chemical changes do.

Front

Can you name a process that is both a physical and a chemical change?

Back

Cooking food is both a physical and a chemical change.