2006-07-14 23:33:13 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Get a saucepan and fill it with water. Put some flour in it to make it less watery (there is a term, but it has for now escaped my mind). Bring it to the boil, and then turn the flame down to low so that it no longer bubbles. Place something that floats on water (i.e. biscuits) onto the saucepan, and you have the plates of the earth. Turn the heat back up to medium, or until the water starts to move. There you go. You are now god and has just made your very own earth out of water and biscuit, and now you also understands why plates move.
2006-07-14 23:45:58 · answer #1 · answered by Anonymous · 4⤊ 0⤋
one theory says that you have pressure from the inside the earth, there is another one that says, that the plates used to fit perfect on the old earth that was smaller in diameter, as the earth expanded you started to have this problems of tectonic plates movement.
2006-07-15 02:31:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
perhaps the reason they move and shift is the pressure that gravity has on them and the constant turning of the earth. There is built up heat pressure at the bottom of the earth, but maybe because the earth keeps spinning, this is the reason the crust is shifting and continents spread.
2006-07-15 02:29:47 · answer #3 · answered by Anonymous · 0⤊ 0⤋
thermal convection --- the heat and movement of the core moves through the mantle and asthenosphere (the part of the upper mantle over which the lithosphere moves)
2006-07-15 15:51:03 · answer #4 · answered by kens_wifey 1 · 0⤊ 0⤋
Convection currents in the molten magma of the mantle.
2006-07-15 03:18:14 · answer #5 · answered by physandchemteach 7 · 0⤊ 0⤋
Conventional currents.
2006-07-14 23:38:44 · answer #6 · answered by Anonymous · 0⤊ 0⤋
pressure from under the Earth !
2006-07-14 23:37:00 · answer #7 · answered by Anonymous · 0⤊ 0⤋