Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: You call the hard case that surrounds the soft parts of some animals the exoskeleton.

Answer: What do you call the hard case that surrounds the soft parts of some animals?

Question: Do particles collide more in two reactants fluid they are both in fluid forms or solid forms.

Answer: Do particles collide more in two reactants when they are both in fluid forms or solid forms?

Question: Blood helps maintain homeostasis by stabilizing ph, temperature, osmotic pressure, and by eliminating this?

Answer:
Blood helps maintain homeostasis by stabilizing ph, temperature, osmotic pressure, and by eliminating this?