What drives surface ocean currents?
a. the rotation of the Earth
b. the Earth's magnetic field
c. wind
d. waves
e. storm activity
C
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The volume of soil does not stay constant but instead swells and shrinks.
Answer the following statement true (T) or false (F)
Describe the centers of gyres, and explain how they may contribute to pollution in the ocean. What will be an ideal response?
Which of the following statements about weight and mass is true?
a. Mass is the same as weight b. The weight of an object on the Moon is more than its weight on Earth c. The mass of an object on the Moon is the same as its mass on Earth d. The mass on an object on the Moon is less than its mass on Earth
Why are all air masses labeled either "polar," "arctic" or "tropical"?
A) because heat exchanges occur only in the low and high latitudes B) because energy exchanges occur only in the high latitudes C) because heat and energy exchanges occur only in the low and high latitudes D) because air masses don't form in the middle latitudes