In a municipal wastewater treatment plant, the primary treatment step includes ________
A) micro-filtering the sewage
B) chlorinating the sewage
C) letting sewage sit in large settling tanks so suspended solids can settle out
D) stirring the sewage to increase oxidation
E) adding bacteria to the sewage
Answer: C
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Using the map provided, locate three continental plates and three oceanic plates. Match the correct label with the correct plate
A) Oceanic Plate B) Continental Plate 1) Pacific Plate 2) North American Plate 3) Nazca Plate 4) Philippine Plate 5) Eurasian Plate 6) African Plate
What is a possible effect of a magnetic reversal on Earth's organisms?
A) Species become extinct as they lose their navigational ability. B) Organisms are subjected to greater amounts of cosmic radiation. C) Organisms are subjected to greater amounts of radioactivity. D) Organisms will change their habitats with the accompanying climate change.
Earth's tallest trees are the
A) coast douglas fir (Pseudotsunga menziessii). B) giant ash (Eucalyptus regnans). C) coast redwoods (Sequoia sempervirens). D) sitka spruce (Picea sitchensis).
According to plate tectonics theory, large ________ circulate molten rock in different directions within Earth's mantle.
A) waves B) convection cells C) conductive cells D) magnetic cells E) subduction cells