21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 8, Problem 14QP
To determine

The reason for the inner core of the Earth is liquid today.

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1. Which of the following STILL significantly heats the Earth's interior?   a. bombardment   b. compression   c. radioactivity   d. differentiation   2. Both the Moon and Mercury have   a. volcanic craters only   b. impact craters only   c. some volcanic and some impact craters
If we pushed the Earth closer to the Sun, it would develop a thick, CO2-rich atmosphere like Venus.  All of that CO2 would come from the Earth's   a. sea floor after the oceans evaporate   b. mantle after the crust melts   c. volcanic eruptions which would become more frequent   d. polar regions after the ice caps melt
The condensation hypothesis for the formation of the moon suggests that the moon and Earth formed as a double planet from the same cloud within the solar nebula. It predicts   a. that the moon and Earth should have nearly the same mass and radius.   b. that the surfaces of the moon and Earth should be very similar and show evidence of plate tectonics.   c. that the moon and Earth should have identical compositions and densities.   d. all of the above.   e. a and c.
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