1. 1 pt(s). |
What is the boiling point of water? | |
A. | 0 C | |
B. | 37 C | |
C. | 90 C | |
D. | 100 C |
2. 1 pt(s). |
Look at these pictures of molecules. which change is taking place?
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A. | melting | ||
B. | freezing | ||
C. | evaporation (change from a liquid to a gas) | ||
D. | condensation (change from a gas to liquid) |
3. 1 pt(s). |
When water changes into a gas, the water molecules | |
A. | get bigger | |
B. | get smaller | |
C. | move faster | |
D. | move slower |
4. 1 pt(s). |
When water changes into ice, the water molecules | |
A. | move slower | |
B. | move faster | |
C. | get bigger | |
D. | get smaller |
5. 1 pt(s). |
When a puddle dries up, which change is taking place?
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A. | melting | ||
B. | freezing | ||
C. | evaporation (change from a liquid to a gas) | ||
D. | condensation (change from a gas to liquid) |
6. 1 pt(s). |
The spaces between molecules in a gas are | |
A. | bigger than in a solid | |
B. | smaller than in a liquid | |
C. | the same size as in a solid | |
D. | the same size as in a liquid |
7. 1 pt(s). |
Brown gas is poured from a gas jar into a bottle. After a few minutes, the gas
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A. | has a smaller volume | ||
B. | keeps the same shape as the gas jar | ||
C. | fills the bottle | ||
D. | keeps the same volume as the gas jar |
8. 1 pt(s). |
20 ml of alcohol is poured into 20 ml of water. The volume of after mixing could be
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A. | 20 ml | ||
B. | 39 ml | ||
C. | 40 ml | ||
D. | 45 ml |
9. 1 pt(s). |
A solid is put into a bottle. The soild now
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A. | fills the bottle | ||
B. | has a bigger volume | ||
C. | has the same volume | ||
D. | has the shape of the bottle |
10. 1 pt(s). |
A liquid is poured from a beaker into a bottle. The liquid now
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A. | fills the bottle | ||
B. | has a bigger volume | ||
C. | keeps the same shape | ||
D. | keeps the same volume |
11. 1 pt(s). |
10 ml of alcohol is poured into 10 ml of water. After mixing the volume is less than 20 ml. This because the alcohol molecules
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A. | are all different sizes | ||
B. | fit between the water molecules | ||
C. | are identical to the water molecules | ||
D. | have the saem size as the water molecules |
12. 1 pt(s). |
Look at the drawings. Which best represents a solid? | ||
A. |
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B. |
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C. |
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D. |
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13. 1 pt(s). |
Look at the drawings. Which best represents a liquid? | ||
A. |
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B. |
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C. |
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D. |
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14. 1 pt(s). |
Look at the drawings. Which best represents a gas? | ||
A. |
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B. |
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C. |
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D. |
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15. 1 pt(s). |
20 ml of sand is poured into 20 ml of peas. The volume after mixing could be
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A. | 20 ml | ||
B. | 35 ml | ||
C. | 40 ml | ||
D. | 45 ml |