Q: What layer is above the mesosphere? Choices: - exosphere - stratosphere - ionosphere - thermosphere A:
thermosphere
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Q: Silicon and germanium react with nitrogen at high temperature to form what? Choices: - oxides - carbonates - isotopes - nitrides A:
nitrides
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Q: Hurricanes that form in the tropics are called what? Choices: - rain cyclones - tornados - caribbean cyclones - tropical cyclones A:
tropical cyclones
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Q: What evolutionary strategy enables substantial activity during sleep for some animals? Choices: - hibernation - reproduction - mutation - adaptation A:
adaptation
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