Law of Conservation of Mass, Science Weekly 5th grade

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass cannot be created or destroyed in a chemical reaction; it remains constant.

Front

What happens to mass when a substance changes state (solid, liquid, gas)?

Back

The mass remains the same when a substance changes state.

Front

If you have 10 grams of ice and it melts into water, how much does the water weigh?

Back

The water weighs 10 grams.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

Does matter disappear when it changes state?

Back

No, matter does not disappear; it only changes form.

Front

What is an example of a substance that can dissolve in water?

Back

Salt is an example of a substance that can dissolve in water.

Front

What does it mean for a substance to dissolve?

Back

To dissolve means to mix a solid, liquid, or gas with a liquid to form a solution.

Front

Is it true that a substance disappears when it is dissolved?

Back

False, the substance does not disappear; it is still present in the solution.

Front

What is the total mass of a mixture of 15 grams of peanuts, 10 grams of walnuts, and 10 grams of almonds?

Back

The total mass is 35 grams.

Front

What happens to the weight of a substance when it is heated and changes to gas?

Back

The weight remains the same when it is cooled back to its original state.