Oldest rocks are farther underground where as the newest rocks are closer to earths surface. sea floor spreading is the spreading of the earths crust under the ocean...
Answer: 1. It must be a full moon (for a lunar eclipse) or a new moon (for a solar eclipse). 2. The Moon must be at or near one of the two points in its orbit where it crosses the ecliptic plane (its nodes).
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Answer:
the earth rotates about it's axis,just as a top spins around it's spindle.the earth rotates from the north pole to the south pole.it takes 24hours for the earth to make one complete rotation.
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Answer:
The epicenter is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins
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