| 1. 1 pt(s). |
Which of these metals would be found pure in the earth’s crust | |
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A. | iron |
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B. | silver |
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C. | aluminium |
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D. | magnesium |
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| 2. 1 pt(s). |
According to the graph, which air pollutant decreased the most from 1970 to 1991?
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A. | Carbon monoxide | |
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B. | Sulfur oxides | |
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C. | Particulates | |
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D. | Lead | |
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| 3. 1 pt(s). |
What is the mass of the rock?
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A. | 335.6 g | |
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B. | 350.6 g | |
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C. | 354.6 g | |
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D. | 356.0 g | |
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| 4. 1 pt(s). |
To obtain a very reactive metal from its compounds requires…………. | |
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A. | little energy |
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B. | a lot of energy |
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C. | not much heat |
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D. | an act of God |
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| 5. 1 pt(s). |
To obtain an unreactive metal from its compounds requires…………. | |
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A. | little energy |
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B. | a lot of energy |
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C. | much heat |
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D. | hope |
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| 6. 1 pt(s). |
Limestone is added to the Blast Furnace to remove impurities. The impurities float on the surface of the molten iron and forms a material called …. | |
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A. | scum |
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B. | slag |
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C. | litter |
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D. | concrete |
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| 7. 1 pt(s). |
We can use the Blast Furnace to extract iron from iron ore but not aluminium from aluminium ore because …… | |
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A. | iron is a less reactive metal and needs less energy to extract it from its ore |
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B. | iron is a more reactive metal and needs less energy to extract it from its ore |
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C. | iron is a less reactive metal and needs more energy to extract it from its ore |
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D. | iron is a more reactive metal and needs more energy to extract it from its ore |
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| 8. 1 pt(s). |
The blast furnace cannot be used to extract aluminium from its ore because | |
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A. | aluiminium is too unreactive a metal and needs the energy of electrolysis to extract it from its ore |
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B. | aluiminium is too reactive a metal and needs the energy of electrolysis to extract it from its ore |
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C. | aluiminium is too reactive a metal and only needs gentle heating to extract it from its ore |
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D. | aluiminium is an unreactive a metal and is found uncombined in the Earth’s crust |
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| 9. 1 pt(s). |
Some metals are found uncombined, in their native form in the ground. These metals would be | |
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A. | hard |
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B. | soft |
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C. | unreactive |
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D. | reactive |
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| 10. 1 pt(s). |
What rocks are you most likely to find beside a volcano? | |
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A. | igneous |
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B. | metamorphic |
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C. | sedimentary |
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| 11. 1 pt(s). |
When heat and pressure are applied to a rock, what kind of rock is formed? | |
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A. | sedimentary |
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B. | igneous |
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C. | metamorphic |
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| 12. 1 pt(s). |
What is the difference between an ore and a mineral containing a metal element? | |
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A. | an ore canotains only a small amount of the metal, but the mineral has enough to make it economic to extract the metal |
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B. | a mineral contains only a small amount of the metal, but the ore has enough to make it uneconomic to extract the metal |
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C. | a mineral contains only a small amount of the metal, but the ore has enough to make it economic to extract the metal |
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D. | an ore contains only a small amount of the metal, but the mineral has enough to make it uneconomic to extract the metal |
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| 13. 1 pt(s). |
When copper chloride is electrolysed | |
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A. | copper metal forms at the positive electrode and chlorine gas forms at the negative electrode |
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B. | chlorine gas forms at the positive electrode and chlorine gas forms at the negative electrode |
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C. | copper metal forms at the positive electrode and copper metal forms at the negative electrode |
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D. | chlorine gas forms at the positive electrode and copper metal forms at the negative electrode |
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| 14. 1 pt(s). |
When assessing what a soil is made up of, a sample can be shaken and left to settle. The bottom layer that settles out will contain | |
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A. | water |
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B. | sand |
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C. | clay |
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D. | silt |
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E. | humus |
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| 15. 1 pt(s). |
Four metals, silver, zinc, iron and copper were added to solutions of each of their salts. When iron was added to copper, what would be observed | |
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A. | the iron disappears |
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B. | the iron disappears and copper appears |
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C. | the iron bubbles releasing hydrogen gas |
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D. | no reaction would be seen |
