Q: What can increase the occurance of earthquakes? Choices: - three plates sliding - plates breaking - plates rupturing - two plates sliding A:
two plates sliding
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Q: Which electromagnetic radiation is used to kill cancer cells? Choices: - ultraviolet rays - X-rays - plasma rays - gamma rays A:
gamma rays
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Q: What process typically occurs to metal exposed to outside elements? Choices: - shrinkage - extraction - explosion - corrosion A:
corrosion
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Q: What has increased in the atmosphere throughout the history of the earth? Choices: - nitrogen - wind - carbon - oxygen A:
oxygen
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