What percentage of Earth's liquid freshwater is in the form of groundwater?
A) 97.2%
B) 96%
C) 0.62%
D) 0.03%
Answer: B
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What elemental compound comprises up to 95% of the mass of a diatom's cell wall?
a. silica (SiO2) b. calcium carbonate c. magnesium carbonate d. calcium sulfate e. sodium bicarbonate
The movement and interchange of water between the sea, air and land can be visualized by the ________.
A. channelization procedures B. solar radiation C. longitudinal profile of a stream D. hydrologic cycle E. hydrosphere interactions such as precipitation
Blowing a threatening extraterrestrial object into small pieces would likely increase the hazard to Earth
Indicate whether the statement is true or false
From 395 to 1453 the eastern Christian church was centered at
A. Jerusalem B. Rome C. Constantinople (Istanbul) D. Baghdad