1) which of these are fossil fuels (select all) ? a) wind b) oil c) coal d) natural gas 2) what method is used to extract aluminum from its ore? a) reduction b) electrolysis 3) look at the diagram, what are the electrodes made of? a) carbon b) lead 4) what are the advantages of recycling copper? (Pick 2) a) more jobs for miners b) conserves ores c) more space in landfill d) less energy used e) increase in greenhouse gases 5) what is a disadvantage of using wind energy? a) renewable b) wind is not always available 6) what is an advantage of using wind energy? a) wind energy is a renewable source b) visual pollution 7) which gas is given off when coal is burnt? a) hydrogen b) carbon dioxide 8) which problem is caused by the burning of fossil fuels? a) global warming because of CO2 release b) smog 9) which of the following are renewable sources of fuel? (Tick all) a) nuclear b) oil c) wind d) solar e) biomass f) gas

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