2007-11-15 16:32:55 · 6 answers · asked by Emma A 1 in Science & Mathematics ➔ Earth Sciences & Geology
^^^^^Plates don't move on magma. They move on the asthenosphere. Asthenosphere is not the same as magma.
Scientists don't "guess". We hypothesize based on our observations; that's not the same as guessing. We test our hypotheses over and over until something is falsified.
Evidence for magma: igneous plutons, hot spot volcanism, continental volcanism, mid ocean ridges, etc.
2007-11-15 18:05:41 · answer #1 · answered by Lady Geologist 7 · 0⤊ 0⤋
where are you? are you speaking in a regional setting or for the entire globe?
either way there are facts and observations that scientist use to form hypotheses as to the structure under the crust.
the hypotheses are put under tremendous scrutiny from the science community and are therefore backed up with plenty of data and evidence from previous hypotheses.
2007-11-16 00:48:14 · answer #2 · answered by pebble pup 2 · 0⤊ 0⤋
It's the best explanation of volcanoes and the fundamental drive behind plate tectonics (plate movement).
2007-11-16 01:55:22 · answer #3 · answered by Anonymous · 0⤊ 1⤋
They are not guessing. When you grow up you'll understand...perhaps.
2007-11-16 09:02:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
yeah I have heard that there is one beneath California....
2007-11-16 01:27:30 · answer #5 · answered by PilotN1 3 · 0⤊ 1⤋
... Heard of a volcano before? If you have, then voila! You have your answer.
2007-11-16 00:36:39 · answer #6 · answered by Tsuki 2 · 0⤊ 0⤋