Imagine that an alien spaceship crashed onto Earth. Which statement would most likely be true?
A) The aliens' home world is another planet in our own solar system.
B) The crash would create a noticeable crater.
C) All the evidence of the crash would be quickly whisked off by the U.S. military to Area 51 in Nevada.
D) It would crash in the ocean.
D
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The _____ of an object is a measure of the amount of matter in the object
A) weight B) mass C) height D) velocity
A kilometer contains 1 million meters
Indicate whether the statement is true or false
The resistance of a mineral to abrasion is known as ________.
Fill in the blank(s) with the appropriate word(s).
How do disk stars orbit the center of the galaxy?
A) They all orbit in roughly the same plane and in the same direction. B) They have orbits randomly inclined and in different directions relative to the galactic center. C) They follow spiral paths along the spiral arms. D) They follow orbits that move up and down through the disk, typically taking them about 50,000 light-years above and below the disk on each orbit.