The largest reserves of freshwater on Earth are found in
A) lakes and wetlands.
B) rivers and groundwater.
C) aquifers.
D) polar ice caps and glaciers.
D
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At 10°C, which is more concentrated-a saturated solution of sodium nitrate, NaNO3, or a saturated solution of sodium chloride? (See figure shown above)
A. At 10°C, a saturated solution of sodium nitrate, NaNO3, is more concentrated than a saturated solution of sodium chloride, NaCl. B. At 25°C, a saturated solution of sodium nitrate, NaNO3, is more concentrated than a saturated solution of sodium chloride, NaCl. C. At 10°C, a saturated solution of sodium chloride, NaCl, is more concentrated than a saturated solution of sodium nitrate, NaNO3 D. At 20°C, a saturated solution of sodium nitrate, NaNO3, is more concentrated than a saturated solution of sodium chloride, NaCl.
Net primary productivity is ________
A) the amount of energy consumers derive from producers B) the energy used by plants to make biomass after respiration C) the biomass of producers minus that of consumers D) the amount of detritus produced by an ecosystem E) the total biomass of an entire ecosystem
The Healthy Forests Restoration Act ________ national forest land
A) was passed in 1976 with the intent to ensure multiple use and sustainable yield of B) was passed to set up the formation of land trusts on C) restricts the use of snowmobiles on D) directs timber companies to remove small trees, underbrush, and dead trees to reduce fire threat E) offers subsidies to timber companies if they replant areas in
_________ were peasant soldiers of the steppes who originally were runaway serfs and others fleeing from the rule of the tsars
Fill in the blank(s) with correct word