Biology, 03.07.2019 09:00 kamarionnatillman13
Gypsum has a hardness of 2 and quartz has a hardness of 7. explain why gypsum can not scratch quartz.
Answers: 1
Biology, 21.06.2019 21:30
Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?
Answers: 1
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Why are scientists concerned about the depletion of the ozone levels in the stratosphere?
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What problem would a person most likely have if her kidney did not work correctly?
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Gypsum has a hardness of 2 and quartz has a hardness of 7. explain why gypsum can not scratch quartz...
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