2007-05-30 04:30:16 · 8 answers · asked by Raz 2 in Environment ➔ Other - Environment
Sometimes they do. But for the most part it has to do with the strength in the architecture of the arch (which is the shape of a cave), which is why romans used arches in there buildings. The arch is very strong and can support a large amount of weight on top of it. If the arch becomes compromised (too thin in an area, cracked, etc) then the structure (the cave) collapses.
2007-05-30 04:39:02 · answer #1 · answered by angrdenaca 3 · 3⤊ 0⤋
It's a combination of weather and erosion. Caves are made of rock, soil etc., so when it rains, gets really hot or cold it affects the structure by expanding and contracting, therefore weakening the cave walls.
2007-06-01 23:44:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Most natural caves are carved out of solid rock, either by water or by flowing lava. As long as the structure is solid, it can support a great deal of weight.
2007-05-30 11:59:11 · answer #3 · answered by Anonymous · 1⤊ 1⤋
sometimes, they do. usually, they are carved out of soft rock and if the rocks on the roof get too heavy, they will cave in.
2007-05-30 11:38:22 · answer #4 · answered by Anonymous · 1⤊ 0⤋
They do but just not generally in our human lifetime. By way of analogy and to lower the risk of seeming laconic, asteroids do hit the earth and cause mass extinctions, but just not generally in our pitiful human lifetimes in terms of the magnitude of geologic time scales.
2007-06-01 20:58:57 · answer #5 · answered by Professor Armitage 7 · 0⤊ 0⤋
usually they do. given enough time, they either cave in or fill in.
caves are not permament naturally occurring structures.
2007-05-30 11:41:15 · answer #6 · answered by avail_skillz 7 · 1⤊ 0⤋
priciple of the egg ,
they are arched
and this is a shape that cannot cave in
2007-05-30 19:57:53 · answer #7 · answered by Anonymous · 0⤊ 2⤋
They do.
2007-05-30 12:09:52 · answer #8 · answered by Anonymous · 0⤊ 2⤋