( Evidence to support the concept that the inner core is solid and the outer core is liquid comes from:
a. The wave shadow effect of P- and S-waves, and the increase in velocity of P- waves as they encounter the solid inner core.
b. The up and down motion of Raleigh waves in the inner core.
c. Refration of seismic waves as they encounter different mediums.
d. The wave shadow effect of P- and S- waves as they encounter the solid and liquid core.
"I'm going with ( a ) and ( d) right now myself, what do you think?"
2007-03-05 10:45:19 · 4 answers · asked by xJessa Gurlx 1 in Science & Mathematics ➔ Earth Sciences & Geology
Please under stand the source and character of each wave. The p wave generated from the point called focus or hipocenter. Speed 13 to 17 K/M per second. Travel through all mediums. Shakes the particles in the direction of its propagation. Secondary wave comes at about half the speed of primary wave. Origin same as p wave. Travel through solid only. Moves the particles perpendicular to the direction of its propagation.Third L wave comes from the surface of the earth. makes lateral movement.Raleigh wave is the most dangerous rolling wave. The later two waves are called surface waves generated because of reflection and refraction. There are several other reflected waves from these basic waves are recorded in the seismograph like pp ps ss . Only seismologist can study the behaviors of these waves and interpret to find the type of earth core through which it has passed.
2007-03-05 18:14:16 · answer #1 · answered by A.Ganapathy India 7 · 0⤊ 0⤋
Unlike the P-wave, the S-wave cannot travel through the molten outer core of the Earth, and this causes a shadow zone for S-waves opposite to where they originate. They can still appear in the solid inner core: when a P-wave strikes the boundary of molten and solid cores, called the Lehmann discontinuity, S-waves will then propagate in the solid medium. And when the S-waves hit the boundary again they will in turn create P-waves. In fact, this property allows seismologists to determine the nature of the inner core.
2007-03-05 19:02:50 · answer #2 · answered by Cotton 3 · 0⤊ 0⤋
You can choose both? Good. Do that.
Why not just read the material? It'd be faster AND surer.
2007-03-05 18:57:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋
yes i think it is (d) and u can just look it up..duh..?
2007-03-05 18:53:43 · answer #4 · answered by princesaboo 1 · 0⤊ 0⤋