2007-06-13 23:23:53 · 6 answers · asked by Sang 1 in Science & Mathematics ➔ Earth Sciences & Geology
By studying the propogation of seismic waves (the shaking of the Earth due to earthquakes). Different materials at different depths make the seismic waves behave differently, so geologists can deduce the likely composition of the Earth from that kind of evidence. There are other ways too - modelling what happens to a molten body as it forms, and so on. This is how they work out the likely composition of bodies we have never visited, e.g. satellites of the gas giants.
2007-06-13 23:29:03 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Science is a collection of theories that are commonly belived as the best answer. The center of the earth is no different, because no one has ever been there.
Scientists, using various geological techniques have arrived to the conclusion that the center of the earth is a core, a mantle and finally the outer layer crust. 10 years from now, another theory may arrive based on new evidence.
Science is theory presented as fact. Until a better fact comes along!
2007-06-14 06:35:42 · answer #2 · answered by eric54_20 4 · 0⤊ 2⤋
By studying geophysical evidence of the propagation of seismic waves, and by comparing the densities of probable rocks to meteorites collected. This assumes the meteorites came from a planet (which is now the asteroid belt) that was similar to the four (remaining) terrestrial planets (Mercury, Venus, Earth and Mars).
2007-06-14 11:29:09 · answer #3 · answered by Amphibolite 7 · 0⤊ 0⤋
it is possible to deduce the composition of the earth's interior by studying the shockwave readings from earthquakes.
2007-06-14 06:27:08 · answer #4 · answered by Anonymous · 1⤊ 0⤋
by studying earth quake waves
2007-06-14 06:34:02 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Google geology. You should find thousands of listings.
2007-06-14 06:27:23 · answer #6 · answered by Anonymous · 0⤊ 0⤋