The scientist ______________ is generally regarded as "the father of geology."
Fill in the blank(s) with correct word
James Hutton
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Gamma-ray bursts lasting longer than two seconds appear to be related to ______________
Fill in the blank(s) with correct word
What do astronomer's mean when they say that Earth is not in a special spot?
A. All space is expanding so Hubble's law would apply around all galaxies. B. The Big Bang explosion sent all material blasting away from the Earth. C. Hubble measured the expansion law from the Moon, not from the Earth. D. Hubble's law applies to some galaxies but not to others, so many planets besides Earth have their own Hubble's law. E. The Sun is at the center of the universe, but the Earth is not.
A sandbag motionless in outer space is hit by a three-times-as massive sandbag moving at 12 m/s. They stick together and move at a speed of
A) 3 m/s. B) 4 m/s. C) 6 m/s. D) 8 m/s. E) none of the above
The number of confirmed extrasolar planets
A) is about 600, and is not expected to rise very much. B) is about 800, and is rising slowly, as observations are quite difficult. C) was about 800 at the time of publication but is rising rapidly due to new observations by the Kepler spacecraft. D) has been decreasing as some observations thought to be planets have been disproven. E) is zero; there are observations thought to be of extrasolar planets but none has yet been confirmed.