A condition where the central and eastern tropical Pacific Ocean turns cooler than normal is called?
a. ?El Niño.
b. ?La Niña.
c. ?the Southern Oscillation.
d. ?the Ekman Spiral.
e. upwelling.?
ANSWER: b
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When a car travels around a circular track at a constant speed, its
A. acceleration is zero. B. velocity is zero. C. both of these D. none of the above
Germanium, Ge (number 32), computer chips operate faster than silicon, Si (number 14), computer chips. So how might a gallium, Ga (number 31), chip compare with a germanium chip?
A. Gallium is located just below aluminum, which is widely known to be an electrical insulator. B. A gallium chip would be even faster because the gallium is more metallic. C. Gallium is more nonmetallic and so it does not conduct electrons very well. D. A gallium chip would be slower because its electrons are more loosely held.
How and when did the atmosphere and ocean form? Which gases are thought to have been present in the early atmosphere?
What will be an ideal response?
A red giant has ________
A) a hydrogen-rich core B) high gas pressure C) a helium-rich core D) no outer shell E) an iron-rich core