Which factor explains why coal dust is explosive?
temperature
surface area
concen...
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Liquid water turns into water vapor at which step in the water cycle
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If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?
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What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.
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