Cepheids are types of stars that regularly change how bright they are over a period of a few
A. days.
B. decades.
C. year.
D. months.
Answer: A
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The El Niño begins to weaken and eventually terminates when
A) the leading edge of the cold Kelvin wave finally reaches the eastern coast of South America. B) cold water spreads out away from the equator, bringing warm upwelling waters from depth. C) cold water converges on the equator, bringing cold upwelling waters from depth. D) warm water spreads out away from the equator, bringing cold upwelling waters from depth.
Estuary areas and associated wetlands are generally increasing in the United States today.
Answer the following statement true (T) or false (F)
There are rarely strong vertical winds because the force of gravity on the atmosphere is balanced by the
A) vertical pressure gradient force. B) horizontal pressure gradient force. C) Coriolis force. D) frictional force. E) centrifugal force.
Earth is perfectly spherical
a. True b. False Indicate whether the statement is true or false