4. Earthworms come out during rains because they need to breathe in
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An earthworm breathes oxygen by absorbing it through its moist skin. It likes damp soil, but if the rain is very heavy, theoxygen in the water-logged soil may runout. Then the worm has to come up intothe air to breathe. On top of the wet ground, the worm can breathe and wriggle along
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They come out because when the water went into the soil and made it heavier, causing them not to breathe and come out.
They don't come out often because they can't handle high temperatures.
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