5.P.2.2 Law of Conservation of Mass

1.

Multiple Choice

2 mins

1 pt

Anthony is performing an experiment. He adds 0.25 grams of baking soda to 5 grams of water and stirs. Anthony watches as the baking soda dissolves in the water. If Anthony weighs the water and baking soda solution, what will its mass be?

4.75 grams

5.0 grams

5.25 grams

7.5 grams

2.

Multiple Choice

2 mins

1 pt

If 10 grams of water are added to 5 grams of salt, how much salt water will be made?

2 grams

5 grams

10 grams

15 grams

3.

Multiple Choice

2 mins

1 pt

A rock weighing 60 g is broken into 2 pieces. What are possible weights for the two pieces of rock?

20 g and 20 g

30 g and 20 g

30 g and 30 g

45 g and 10 g

4.

Multiple Choice

2 mins

1 pt

Jackie creates a piece of artwork by melting crayons and mixing the colors together. She uses 10 crayons that weighed 5 grams each. What is most likely the weight of her artwork?

4 grams

20 grams

50 grams

100 grams

5.

Multiple Choice

2 mins

1 pt

Leslie places 5 pounds of ice in a 1 pound bucket with a lid. The next day, she notices all the ice has melted. When she weighs the bucket with the melted ice, what will itmost likely weigh?

4 pounds

6 pounds

7 pounds

5 pounds

6.

Multiple Choice

2 mins

1 pt

Thomas has 1,200 g of salt water. Which are the correct measures of salt and water before they were mixed?

600 g of salt and 600 g of water

900 g of salt and 200 g of water

1,200 g of salt and 1,200 g of water

700 g of salt and 5,000 g of water

7.

Multiple Choice

2 mins

1 pt

Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?

50 g

100 g

200 g

400 g

8.

Multiple Choice

2 mins

1 pt

A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?

The mass of the balloon increases because the size of the balloon has increased.

The mass of the balloon increases because the temperature of the balloon has increased.

The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.

The mass of the balloon stays the same because warming decreases the mass enough to cancel out the effect of increasing the size.

9.

Multiple Choice

30 sec

1 pt

A teacher places a penny into an amount of acid in a closed container to demonstrate a chemical change. The penny weighs 3 grams and the acid 230 grams. After the chemical reaction takes place, what will be the mass of the penny and acid?

3 grams

200 grams

230 grams

233 grams

10.

Multiple Choice

30 sec

1 pt

Mrs. Godfrey wants to prove to her students that when an object is burned, its total mass is the same before and after the reaction. What should Mrs. Godfrey do to make sure this is shown by the experiment?

burn the object in a closed container

burn the object outside on a nice day

add water to the object after it is burned

split the object into two equal pieces before burning

11.

Multiple Choice

30 sec

1 pt

A jeweler melts gold to make jewelry. As the gold melts, the mass

increases

decreases

stays the same

is destroyed

12.

Multiple Choice

30 sec

1 pt

Two kilograms of water are placed in a closed container. The container is placed in the freezer, and after a few hours it turns into ice. Which is most likely the mass of the ice?

1.0 kilogram

1.5 kilograms

2.0 kilograms

2.5 kilograms

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