In the context of studying major bodies of our solar system, what category of object does our Moon best fit?
A. jovian moon
B. small asteroid
C. terrestrial world
D. large comet
E. jovian planet
Answer: C. terrestrial world
Explanation: We consider the Moon to be one of the terrestrial worlds because of its similarity in size, mass, and composition to the other terrestrial worlds (Mercury, Venus, Earth, and Mars). As you will see when we study comparative planetology, this categorization is useful for understanding geological processes on the terrestrial worlds.
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A) faint red stars B) brown dwarfs C) Jupiter-size objects D) WIMPs E) all of the above
In a laboratory on Earth, all the air is pumped from a large tube. A feather and a steel ball are simultaneously released from rest inside the tube. What happens next?
A. The feather falls and hits the bottom before the steel ball B. The steel ball falls and hits the bottom before the feather C. Both objects float weightless inside the tube D. Both objects fall and hit the bottom at the same time
The Milky Way Galaxy is
a. a spiral galaxy. b. part of a cluster of galaxies that contains a few dozen galaxies. c. about 80,000 light years in diameter. d. all of the above.
When plates collide, they fuse together and come to rest
Indicate whether the statement is true or false