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- 1. Multiple Choice
Look at the picture above. If the bucket were left outside on a hot day but brought inside before any evaporation occurred, how would the mass be affected?
There would be no mass.
The mass would be less.
The mass would be greater.
The mass would not be affected.
- 2. Multiple Choice
Angie mixes the fertilizer for her plants at the beginning of the week. She puts 40 g of the fertilizer-water solution in each of seven closed containers and uses one container each day to water her plant.
One day, she goes outside to get a container and finds that the solution in it is frozen. How much mass should the frozen solution in the container have?
20 grams
0 grams
40 grams
10 grams
- 3. Multiple Choice
If a solid that has a mass of 25 grams melts, it should result in a _______ with a mass of _______ grams.
liquid; 0
liquid; 25
solid; 25
gas: 0
- 4. Multiple Choice
Leigh is preparing popcorn for her friends. She removes a stick of butter from the refrigerator and cuts a fourth of it from the rest.
Leigh remembers her lesson in school today about the conservation of mass that occurs during state changes. She wants to test what she learned, so she measures the mass of the butter she will melt. Its mass is 35 g. Then, she places the butter in the microwave and melts it.
What should the mass of the liquid butter be once it is melted?
15 grams
35 grams
40 grams
70 grams
- 5. Multiple Choice
Substances have more kinetic energy in the _______ state than in the _______ state.
solid; liquid
gas; solid
solid; gas
liquid; gas
- 6. Multiple Choice
Kia is doing an experiment in science lab. She is given a beaker containing 100 g of liquid. The beaker has markings on the side for measuring volume. The water comes up to the 100 mL mark. Kia puts the liquid on a hot plate by mistake. By the time she realizes the mistake, half of her liquid has evaporated.
Kia still needs 100 g of liquid for her experiment. To find out how much liquid she has to replace, she needs to re-weigh her liquid. However, the balance she used before is now broken. The teacher tells Kia that she can tell how much water is left by looking. The water now comes up to the 50 mL mark.
How much mass does Kia's remaining water have?
100 grams
50 grams
20 grams
2 grams
- 7. Multiple Choice
The process that changes a solid directly into a gas is called sublimation. A solid that begins with a mass of 450 g will sublime to give off a gas with a mass of _______ g.
45
450
0
900
- 8. Multiple Choice
Mrs. Andrews did a science demonstration with dry ice. First, she placed some dry ice inside of a balloon. Then she tied off the balloon and placed it on a triple beam balance. The balance showed that the combined mass of the balloon and dry ice was 22 grams. While the balloon sat on the balance, it began to expand. As the dry ice sublimed, or changed from a solid into a gas, the gas filled the balloon. When the dry ice had sublimated completely, how much mass was sitting on the balance and why?
More than 22 grams because the balloon inflated, so its mass increased.
Exactly 22 grams because mass cannot be created or destroyed by ordinary physical changes.
Less than 22 grams because a gas weighs less than a solid.
Less than 22 grams because warm things weigh less than cold ones.
- 9. Multiple Choice
Joanna fills a glass with 30 grams of water. She pours the water into a tray to make ice cubes.
The tray has room to make 6 ice cubes. Joanna is careful not to spill any of the water as she pours it into the tray with an equal amount in each cube of the tray.
How much mass should each of the ice cubes have?
30 grams
10 grams
0 grams
5 grams
- 10. Multiple Choice
16 micrograms
1.6 micrograms
0 micrograms
.6 micrograms
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