The vertical profile of ____ is variable in each layer of Earth's atmosphere
A) air temperature
B) air pressure
C) altitude
D) air density
A
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Where did most of the water on Earth likely come from?
A. Water came equally from comets and out-gassing. B. Water came mostly from comets. C. Water came mostly from out-gassing.
Streams respond quickly to water input, so once a heavy rainstorm has stopped, floodwaters will rise no higher.
Answer the following statement true (T) or false (F)
Pesticides, primarily herbicides and insecticides, are widely used in agriculture because
A. they allow farmers to spend less on less time and money to till the soil. B. they increase the amount of food produced. C. they reduce crop loss to weeds and insects. D. All of the statements are correct. E. None of the statements is correct.
North America with roughly 4.5% of the world's population consumes about 40% of the gasoline produced in the world.
Answer the following statement true (T) or false (F)