Land subsidence is generally not reversible because
A) compacted clay layers cannot be expanded.
B) once pumping is stopped, layers continue to compact.
C) compacted sandy aquifers cannot be expanded.
D) none of the above
Answer: A
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The Milky Way is tilted on the sky because
A. it's appearance depends entirely on where you are on Earth. B. the disk of the Galaxy is warped. C. the Solar System is tilted compared to the disk of the Galaxy. D. the Sun's gravity deflects incoming starlight.
Movement of the lithosphere
A) has a plastic-like flow. B) causes earthquakes and volcanic activity. C) has a leisurely pace and allows the formation of gentle rolling hills. D) is intermittent.
The separation of the ________ force from the Grand Unified Force was accompanied by the release of energy which went into forcing an immense inflation of the size of the universe
Fill in the blank(s) with correct word
Each choice below describes how a few astronomical phenomena are related to time periods. Which list is entirely correct? (Careful: some lists are partially correct.)
A) Earth's rotation defines a day. The saros cycle of eclipses defines a month. Earth's orbit defines a year. Earth's cycle of axis precession takes 26,000 years. B) Earth's rotation defines a day. The cycle of the Moon's phases takes about a month. Earth's orbit defines a year. Earth's cycle of axis precession takes 26,000 years. C) Earth's rotation defines a day. The cycle of the Moon's phases takes about a week. Earth's orbit defines a year. Earth's cycle of axis precession defines a month. D) Earth's rotation defines a day. The Sun's rotation defines a week. The Moon's rotation defines a month. Earth's orbit defines a year.