Aquifers are sources of underground ________
A) natural gas
B) water
C) petroleum
D) coal
B
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A prairie was covered by grasses and wildflowers. A farmer removed this native vegetation so he could plow the land and plant crops. For years, normal rain fell and the farm thrived
But after a few years of drought, the crops died and the topsoil on the farm eroded. Explain how the farmer's use of the land led to the erosion that occurred there.
Decaying plant matter removes carbon from the atmosphere.
Answer the following statement true (T) or false (F)
Which of the following solutions is the most concentrated?
A. 3 liters of water with 30 grams of sugar B. 0.1 liter of water with 1 gram of sugar C. 2 liters of water with 0.2 gram of sugar D. 0.5 liter of water with 50 grams of sugar E. They all have the same concentration.
Ice sheets in high latitudes are known to have advanced and retreated over much of the northern hemisphere throughout the Earth's long history
Indicate whether the statement is true or false