What is the current debate about the origin of water on Earth?
What will be an ideal response?
Water on Earth may have arrived from the bombardment of icy planetesimals, or comets. Evidence has shown from comet LINEAR that it contained water with a ratio of isotopes similar to the water on Earth.
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The following four forces act on a 4.00 kg object: F1 = 300 N east F2 = 700 N north F3 = 500 N west F4 = 600 N south What is the acceleration of the object?
A) 224 N in a direction 63.4° north of west B) 300 N in a direction 63.4° north of west C) 300 N in a direction 26.6° north of west D) 224 N in a direction 26.6° north of west E) 2100 N in a direction 26.6° north of west
The climate of northwestern Europe is greatly affected by the
A) Kuroshio current. B) Gulf Stream. C) trade winds. D) jet stream.
Explain the relationship between the general circulation of the air and the circulation of ocean currents
What will be an ideal response?
By what process does the Sun generate energy?
A) nuclear fusion B) chemical reactions C) nuclear fission D) gravitational contraction E) gradual expansion