An active galactic nucleus
A. is a supermassive supergiant star that resides at the center of larger galaxies.
B. is a place of intense star formation.
C. is a giant dust cloud at the center of a galaxy.
D. arises from the gigantic black hole at the center of a galaxy.
Answer: D
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Worldwide, about two-thirds of aquatic foods are captured in the wild; the rest are the result of
A) aquaculture. B) marine capture production. C) freshwater capture production. D) artisanal fishing.
Sheet-joint-bounded slabs of rock slip or slide off the parent rock, leaving large, rounded masses known as ____________________
Fill in the blank(s) with correct word
Since 1979 hurricanes and tropical storms have been given both male and female names. How are these storms named if there are more than 21 named storms in a given year?
A. They just keep getting alternating male and female names. B. They are named after letters in the Greek Alphabet, starting with alpha. C. They are named by number, starting with 22. D. They are named after the ancient Roman gods. E. They are named after famous scientists.
What were some of the major geologic processes that helped shape the Rocky Mountains into such a spectacular range of dramatic peaks and both U-shaped and V-shaped valleys?
What will be an ideal response?