The amount of energy emitted by a star each second is the ________ and is measured in ________.
A. apparent brightness; degrees K
B. apparent brightness; watts
C. luminosity; watts
D. temperature; degrees K
Answer: C
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Phobos is so close to Mars that tides are currently making its orbit _______________
Fill in the blank(s) with correct word
Where do scientists find the key evidence linking the extinction of the dinosaurs to the impact of an asteroid or comet?
A. in sediments that surround a large crater in Mexico B. in sediments separating rocks from the time when dinosaurs existed from those deposited after dinosaurs were no longer found C. in rock brought up by drilling deep into Earth's mantle D. in sediments found on the ocean bottom near mid-ocean ridges E. in rocks returned from craters on the Moon
The purpose of prescription glasses for a near-sighted person is to bring the apparent positions of distant objects
a. to the far point of the eye. b. to the near point of the eye. c. to the retina of the eye. d. none of the above.
How does the density of Jupiter compare to the terrestrial planets?
A) It is denser than all the terrestrial planets combined. B) It is denser than the Moon, but less dense than any of the others. C) Its density is slightly less than Mercury, but more than Mars. D) Its density is about the same as Mars. E) Its density is less than any terrestrial.