Global satellite imagery of land on Earth over the past 20 years reveals
A) a net improvement of the quality and area of cropland.
B) a net decline in the overall quality of cropland.
C) the loss of more than 5% of land to the construction of new lakes and dams for electrical generation.
D) a loss of more than 7% of land mass due to rising ocean levels.
B
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Which of the following is not something we can learn by determining isotopic ages?
A) The age of a volcanic eruption B) The age when a rock is uplifted toward the surface C) The age of material from which clasts in a sedimentary rock were derived D) The cooling history by using different types of isotopic ages E) We can determine all of these.
Most weather occurs in this temperature-characterized atmospheric layer, the ________
Fill in the blank(s) with the appropriate word(s).
The Mercalli scale uses both subjective and objective measurements of intensity
a. True b. False
There are places on the deepest parts of the ocean where no light penetrates that support colonies of life
Indicate whether the statement is true or false