The condition that exists when the buoyancy force pushing lithosphere up equals the gravitational force pulling lithosphere down is called:
a. Isostasy
b. Counter balance
c. Equivalence
d. Isostatic equilibrium
e. Both a and d
Answer: e. Both a and d
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Despite the recent warming of the troposphere, in 2009, the world's oceans were the coolest in 130 years of record keeping.
Answer the following statement true (T) or false (F)
Why have populations of neotropical migrants (birds that migrate from the U.S. to the tropics every year) such as tanagers declined so greatly in recent years even though their forest habitats in North America are relatively stable?
A. Loss of habitat in Central and South America. B. Pollution in the U.S. C. Colder winters in the U.S. D. They are being hunted for food in the tropics.
Plant photosynthesis increased the concentration of ____________________ in Earth's early atmosphere
Fill in the blank(s) with correct word
Numerical weather prediction breaks the atmosphere into three-dimensional boxes using the ____________________ model
Fill in the blank(s) with correct word