Sulfide deposits of copper and iron form through seawater circulation at ________ plate boundaries
Fill in the blank(s) with correct word
divergent
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Which one of the following aquifers would be best for purifying groundwater that is contaminated with harmful sewage bacteria?
A) Highly fractured granite B) Coarse gravel with few small grains C) Sand D) Cavernous limestone
A large person and a small person wish to parachute at equal terminal velocities. The larger person will have to
A) get a larger parachute. B) jump lightly. C) pull upward on the supporting strands to decrease the downward net force. D) jump first from the plane. E) none of the above
The reaction of nitric acid, HNO3(aq), with calcium carbonate, CaCO3(s) produces calcium nitrate, carbon dioxide, and water. Which of the following is the correct balanced equation for this reaction?
A) HNO3(aq) + CaCO3(s) ? CaNO3(aq) + CO2(g) + H2O(l) B) 2 HNO3(aq) + CaCO3(s) ? CaNO3(aq) + CO2(g) + H2O(l) C) HNO3(aq) + CaCO3(s) ? Ca(NO3)2(aq) + CO2(g) + H2O(l) D) 2 HNO3(aq) + CaCO3(s) ? Ca(NO3)2(aq) + CO2(g) + H2O(l)
Earth's re-radiation of energy into space consists mainly of ________
A) long rays B) gamma rays C) short rays D) ultraviolet rays E) x-rays