| 1. 1 pt(s). |
Janet investigated the strength of model bridges. She added weights to each bridge until the bridge collapsed. Janet wanted to find out how the length of a bridge affects its strength. Which two boxes show the experiments she should compare for a fair test?
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A. | 2 and 3 | |
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B. | 2 and 4 | |
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C. | 1 and 2 | |
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D. | 1 and 3 | |
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| 2. 1 pt(s). |
Janet investigated the strength of model bridges. She added weights to each bridge until the bridge collapsed. Janet compared the experiments in boxes 1 and 4. What was she trying to find out?
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A. | How the length of the bridge affects the strength of the bridge | |
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B. | How the material from which the bridge is made affects the strength of the bridge | |
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C. | How the shape of the brdige affects the strength of the bridge | |
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D. | If the bridge will fall down | |
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| 3. 1 pt(s). |
A road tanker delivers unleaded petrol, super-unleaded petrol and diesel to a filling station. The volume of unleaded petrol in the tanker is 6 600 litres. The volume of super-unleaded petrol is 1200 litres. Calculate the total volume of petrol.
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A. | 5400l | |
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B. | 7800l | |
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C. | 18600l | |
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D. | 7920000l | |
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| 4. 1 pt(s). |
A road tanker delivers unleaded petrol, super-unleaded petrol and diesel to a filling station. The volume of unleaded petrol in the tanker is 6 600 litres. The volume of super-unleaded petrol is 1200 litres. The total volume of all three fuels in the tanker is 11000 litres. Calculate the volume of diesel.
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A. | 5400l | |
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B. | 7800l | |
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C. | 18800l | |
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D. | 3200l | |
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| 5. 1 pt(s). |
A plumber fitted a 12 kg water tank in a house. He connected 4 copper pipes to the tank. Each pipe had a mass of 2 kg. What is the total mass of the water tank and the four pipes?
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A. | 12kg | |
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B. | 14kg | |
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C. | 20kg | |
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D. | 56kg | |
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| 6. 1 pt(s). |
The wreck of a Spanish galleon was found by divers. The divers found five gold coins. The total mass of the five coins was 125 g. Calculate the mass of one coin.
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A. | 40g | |
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B. | 25g | |
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C. | 625g | |
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D. | 125g | |
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| 7. 1 pt(s). |
The diagram below shows 20 grams of two different materials, A and B, on a laboratory balance. Compared to material A, material B has a different
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A. | state | |
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B. | mass | |
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C. | shape | |
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D. | density | |
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| 8. 1 pt(s). |
Examine the diagram below which represents four processes, labeled A, B, C, and D, that occur when water changes phase. Which process is represented by B?
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A. | condensing | |
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B. | evaporating | |
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C. | freezing | |
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D. | melting | |
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| 9. 1 pt(s). |
Examine the diagram below which represents four processes, labeled A, B, C, and D, that occur when water changes state. Which two processes increase the motion of the molecules?
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A. | A and B | |
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B. | B and C | |
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C. | C and D | |
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D. | D and A | |
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| 10. 1 pt(s). |
The diagram below shows a tall beaker with four different liquids and their densities. If a ball that has a density of 1.73 g/cm3 is placed in the beaker, where will the ball come to rest?
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A. | on top of liquid A | |
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B. | between liquids B and C | |
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C. | between liquids C and D | |
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D. | on the bottom of the beaker | |
