Question

If pumice can float in water, why is it considered a rock

Answer 1

Answer:

Pumice is a light volcanic rock. It has a lot of pores in it. It is an igneous rock. The rock is light enough to float on water until it becomes waterlogged.

Explanation:

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Answer 2

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While scientists have known that pumice can float because of pockets of gas in its pores, it was unknown how those gases remain trapped inside the pumice for prolonged periods.

If you soak up enough water in a sponge, for example, it will sink.