The volcanic activity of Enceladus has what effect outside the moon itself?
What will be an ideal response?
It is believed to have created the E ring of Saturn, which shares the same orbit as this moon.
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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.
Based on galactic rotation curves and cluster dynamics, we think dark matter
A) is best detected from the X-rays it produces in the intergalactic medium. B) comprises over 90% of the entire mass of the universe. C) will have no effect on the fate of the universe. D) is a minor component of the entire mass of the universe. E) will doom the universe to collapse, overcoming the redshifts we now observe.
Dispersion occurs in a medium because
a. the index of refraction depends on wave amplitude. b. of regular reflection. c. of diffuse reflection. d. the index of refraction depends on the wavelength.
The most important highlight of Precambrian Time was the
A) explosion of life. B) asteroid impact that resulted in the formation of our Moon. C) accumulation of free oxygen in the atmosphere. D) emergence of reptiles.