U6.W1.MC Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances change into new substances with different properties.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without changing its chemical composition.

Front

What happens to the mass of a substance during a physical change?

Back

The mass remains the same before and after the change.

Front

What happens to the mass of water when it turns from ice to water?

Back

The mass stays the same; it is still water.

Front

What is an example of a physical change?

Back

Melting ice, tearing paper, or dissolving sugar in water.

Front

True or False: Freezing orange juice is a chemical change.

Back

False; it is a physical change.

Front

What is an observable property of ice cream when it melts?

Back

It becomes a liquid.

Front

Does the mass of a chocolate bar change after it melts?

Back

No, the mass stays the same.

Front

What is an example of a chemical change?

Back

Burning wood or rusting iron.

Front

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

Back

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