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6. Ores are rocks that contain very large amounts of minerals from which metals can be extracted...
7. Argon is not found in the Earth's atmosphere
8. Can Aluminium be extracted by using electrolysis?
9. Which of these facts about metals is FALSE?
- they conduct electricity
- they are strong
- they have low melting points
- they are melleable
10. Electrolysis is the breaking down of an elecrolyte using an electric current...
11. The ___________ is the layer of gas which surrounds the Earth.
- hydrosphere
- atmosphere
- lithosphere
- biosphere