In the giant impact theory of the Moon's origin,
a. the Moon broke from a rapidly spinning Earth.
b. Earth and its Moon formed from the same cloud of matter.
c. the Moon formed elsewhere in the solar nebula and was later captured by Earth.
d. the Moon formed when a very massive planetesimal smashed into the young Earth.
d
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Which statement about Saturn's rings is not true?
A) The large gap known as the Cassini Division is shaped by an orbital resonance with the moon Mimas, which orbits well outside the rings. B) Some features of the rings are shaped by small moons that actually orbit within the ring system. C) The rings must look much the same today as they did shortly after Saturn formed. D) The rings are so thin that they essentially disappear from view when seen edge-on.
The deviation from the way a compass needle points from the true north direction is the magnetic declination
a. True b. False Indicate whether the statement is true or false
Clusters containing clusters of galaxies are called ______________
Fill in the blank(s) with correct word
The nuclei of different isotopes of a given element have the same number of
A) protons. B) neutrons. C) nucleons. D) electrons. E) positrons.