Only about 2.5% of all the water on our planet is fresh water, and ________
A) over half of this is in wetlands near coastlines and is becoming contaminated with saltwater
B) over half of this is extremely hard water and is nearly unusable for drinking or agriculture
C) most of this is far from where humans live
D) most of this is in large, freshwater lakes
E) most of this is in underground aquifers
Answer: C
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What do many experts attribute as a cause of many of Africa's civil conflicts?
A) the ill-conceived territorial divisions crafted at the Berlin Conference B) uneven distribution of resources C) outside agitators D) unemployment E) Apartheid
Microbes in our digestive tract that help us digest food demonstrate a ________ association
A) benthic B) parasitic C) pathogenic D) homeopathic E) symbiotic
___________________ is a rock type that has virtually no pore space
Fill in the blank(s) with correct word
The movement of a glacier along its bottom, lubricated by meltwater, is known as ________
A) basal slip B) equilibrium glide C) glacial flour D) fjord E) firn