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cave ⪢⪢
A _____ is a natural opening in the ground with a hollow space beneath the surface large enough for people to enter.
1182
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dissolve ⪢⪢
This acid allows it slowly _____ certain kinds of rock like limestone, marble or gypsum.
16430
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drip ⪢⪢
As the water _____s and later evaporates, it leaves behind a thin layer of minerals.
16433
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soak ⪢⪢
Rain has a tiny bit of acid in it and when it _____s through soil, it collects some more.
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16426
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stalagmite ⪢⪢
While _____s come up from the floor of a cave like a column.
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14966
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trickle ⪢⪢
These formations are created when water carrying minerals _____s through the cave.
16432
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