| 1. 1 pt(s). |
What is the boiling point of water? | |
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A. | 0 C |
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B. | 37 C |
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C. | 90 C |
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D. | 100 C |
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| 2. 1 pt(s). |
Look at these pictures of molecules. which change is taking place?
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A. | melting | |
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B. | freezing | |
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C. | evaporation (change from a liquid to a gas) | |
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D. | condensation (change from a gas to liquid) | |
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| 3. 1 pt(s). |
When water changes into a gas, the water molecules | |
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A. | get bigger |
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B. | get smaller |
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C. | move faster |
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D. | move slower |
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| 4. 1 pt(s). |
When water changes into ice, the water molecules | |
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A. | move slower |
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B. | move faster |
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C. | get bigger |
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D. | get smaller |
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| 5. 1 pt(s). |
When a puddle dries up, which change is taking place?
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A. | melting | |
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B. | freezing | |
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C. | evaporation (change from a liquid to a gas) | |
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D. | condensation (change from a gas to liquid) | |
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| 6. 1 pt(s). |
The spaces between molecules in a gas are | |
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A. | bigger than in a solid |
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B. | smaller than in a liquid |
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C. | the same size as in a solid |
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D. | the same size as in a liquid |
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| 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 | |
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B. | keeps the same shape as the gas jar | |
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C. | fills the bottle | |
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D. | keeps the same volume as the gas jar | |
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| 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 | |
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B. | 39 ml | |
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C. | 40 ml | |
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D. | 45 ml | |
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| 9. 1 pt(s). |
A solid is put into a bottle. The soild now
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A. | fills the bottle | |
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B. | has a bigger volume | |
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C. | has the same volume | |
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D. | has the shape of the bottle | |
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| 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 | |
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B. | has a bigger volume | |
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C. | keeps the same shape | |
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D. | keeps the same volume | |
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| 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 | |
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B. | fit between the water molecules | |
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C. | are identical to the water molecules | |
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D. | have the saem size as the water molecules | |
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| 12. 1 pt(s). |
Look at the drawings. Which best represents a solid? | ||
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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? | ||
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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? | ||
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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 | |
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B. | 35 ml | |
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C. | 40 ml | |
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D. | 45 ml | |
