Could You Pass Eighth Grade Science?

Could you pass eight grade science? Take the quiz! I did well, partially because I help my fifth-grader study these exact things for her science class. -via Geek Like Me

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our body can use anaerobic respiration when there is not enough oxygen to provide our muscles after long periods of "aerobic" exercise. It's less efficient and the end product is lactic acid which causes the soreness after a hard exercise
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