5.P.2.2 Flashcard (Conservation of Mass)

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of the reactants equals the total mass of the products.

Front

If 500 grams of water freezes, what happens to its mass?

Back

The mass of the ice formed will be the same as the mass of the water, which is 500 grams.

Front

What happens to the mass of an egg after it is boiled?

Back

The mass of the egg remains the same after boiling; if it was 55 grams before boiling, it will still be 55 grams after boiling.

Front

If you add ice cubes weighing 1 ounce each to 12 ounces of water, what will be the total weight after the ice melts?

Back

The total weight will be 18 ounces (12 ounces of water + 6 ounces from 6 ice cubes).

Front

When mixing substances, how do you find the total mass of the solution?

Back

To find the total mass of a solution, add the masses of all components together. For example, 125 grams of sugar + 250 grams of water + 5 grams of flavoring = 380 grams.

Front

What happens to the weight of a glass of tea with ice after sitting in the sun?

Back

The weight will be less than 200 grams because some of the liquid may evaporate into the atmosphere.

Front

What is an example of a physical change?

Back

Freezing water into ice is a physical change; the water changes state but its mass remains the same.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change; it transforms into ash and gases, and the mass changes.

Front

How does evaporation affect mass?

Back

Evaporation causes a loss of mass because the liquid turns into vapor and escapes into the atmosphere.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.