Gravity studies by spacecraft, seismic wave studies, measurements by subterranean probes, or oil well drillings??
2007-07-11 09:47:58 · 5 answers · asked by Girl 3 in Science & Mathematics ➔ Astronomy & Space
seismic wave studies give us a picture of what the earth is like beneath the crust. since sound waves refract differently in different mediums they can tell us what it is like deep down.
2007-07-11 09:53:46 · answer #1 · answered by Tim C 5 · 0⤊ 0⤋
Seismic waves are sent through the Earth and scientists measure these to find out the density.
2007-07-11 09:54:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Seismic studies. P-waves change velocities through different substances, like liquids versus solids, and S-waves don't travel through liquid.
2007-07-11 09:51:41 · answer #3 · answered by Lady Geologist 7 · 3⤊ 0⤋
seismic wave studies.
2007-07-11 09:55:29 · answer #4 · answered by quantumclaustrophobe 7 · 0⤊ 0⤋
Lava.
2007-07-11 09:51:00 · answer #5 · answered by zahbudar 6 · 0⤊ 0⤋