Physical Changes Fifth Grade.

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same.

Front

What happens to the mass when two substances are mixed together?

Back

The total mass of the mixture is equal to the sum of the masses of the individual substances.

Front

If you pour 30 grams of salt into 100 grams of water, what is the mass of the new mixture?

Back

130 grams.

Front

What is the mass of a loaf of bread after it is sliced into pieces?

Back

The mass remains the same; it is still 500 grams.

Front

What is the total mass of 45 grams of flour and 25 grams of water when mixed?

Back

70 grams.

Front

When combining 20 grams of sugar with 50 grams of flour, what is the total mass of the mixture?

Back

70 grams.

Front

How much beverage do you have when you mix 1 cup of milk into 4 cups of coffee?

Back

5 cups.

Front

What is the principle of conservation of mass?

Back

The principle states that mass is neither created nor destroyed in a chemical reaction or physical change.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting.

Front

What is an example of a physical change?

Back

Cutting paper is an example of a physical change.