The most effective aquifer is likely to ____
A)be composed of metamorphic rock
B)be composed of igneous rock
C)have well-sorted and well-rounded sediments with high permeability
D)have high porosity and low permeability
E)have low porosity and high permeability
C
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Bioaccumulation is ________
A) the process by which chemicals are stored in the tissues of living organisms B) the chemical change that occurs when substances alter the growth and development of humans C) average length of time a molecule of a substance spends in the environment D) the total amount of chemicals stored in the tissues of living organisms E) the chemical change that occurs when substances are altered by the sun or metabolized by microorganisms
Solar wind is composed of ____________________, or ____________________, travelling through space
Fill in the blank with correct word.
Before the 1960s, how did geologists view the ocean basins and continents of the Earth?
a. Scientists believed that continents and ocean basins changed shape and location over time through the repeated erosion and deposition of sediments. b. Scientists believed that all ocean basins and landmasses were permanently fixed in their positions. c. Scientists believed that the formation of mountain chains and new ocean basins caused the movement of continents and oceanic sea floor. d. Scientists believed that continents moved over time as a result of convection in the mantle. e. Scientists believed that continents moved over time by plowing through oceanic crust.
The growing human population
A) is best addressed by the conversion of ecosystems to more direct human uses. B) requires the restoration of ecosystems better designed to serve the needs of humans. C) will increase the need for ecosystem services. D) will require an increase in forests and a decrease in agricultural land.