1) What devices are used in solar panels to turn sunlight into electricity? 2) Why is solar energy considered an inexhaustible resource? 3) What is one challenge of using solar energy on a large scale? 4) What is biomass made from? 5) Why is biomass considered a renewable energy source? 6) What is one concern about using biomass for energy? 7) What is geothermal energy used for? 8) Where are the most active geothermal resources usually found? 9) What is one disadvantage of geothermal energy?

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