Which property of pumice makes it light enough to float?

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Multiple Choice

Which property of pumice makes it light enough to float?

Explanation:
Buoyancy depends on density relative to water. Pumice becomes very light because its lava traps a lot of air in tiny cavities as it erupts and cools rapidly. Those air-filled pockets create a foam-like, highly porous rock, lowering the overall density so it can float. While magma composition affects color and minerals, it doesn’t by itself determine buoyancy. Pore size describes texture, but without the widespread air pockets, density wouldn’t drop enough to float. The key factor is the abundance of air pockets inside pumice.

Buoyancy depends on density relative to water. Pumice becomes very light because its lava traps a lot of air in tiny cavities as it erupts and cools rapidly. Those air-filled pockets create a foam-like, highly porous rock, lowering the overall density so it can float. While magma composition affects color and minerals, it doesn’t by itself determine buoyancy. Pore size describes texture, but without the widespread air pockets, density wouldn’t drop enough to float. The key factor is the abundance of air pockets inside pumice.

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