Which of the following is often indicated by a hook-shaped echo on a radar screen?
A. a thunderstorm with very frequent lightning
B. the possible presence of a tornado-producing thunderstorm
C. a developing hurricane
D. a rotating anvil cloud at the top of a thunderstorm
Answer: B
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In 1750, this was an external area in the world-system
A) Australia B) Brazil C) Caribbean D) eastern North America E) Mediterranean North Africa
How would the eruption of a volcano cause global climate changes?
A. Dust from the volcano blocks sunlight. B. Sulfuric acid is produced which interferes with solar radiation. C. It can cause stratospheric ozone reduction allowing increased ultraviolet light to reach the Earth's surface. D. Both "Dust from the volcano blocks sunlight" and "Sulfuric acid is produced which interferes with solar radiation." E. Both "Sulfuric acid is produced which interferes with solar radiation" and "It can cause stratospheric ozone reduction allowing increased ultraviolet light to reach the Earth's surface."
According to glacial ice records, the Earth was significantly cooler between 10,000 and 40,000 years ago than it is today
Indicate whether the statement is true or false
Structure of the atmosphere
What will be an ideal response?