Which compound below would NOT contribute to salt weathering?
a. silicon dioxide
b. sodium chloride
c. calcium sulfate
d. calcium carbonate
a
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You are an aquatic biologist studying a small lake. The stream that drains into this lake runs by croplands. You are detecting a pesticide called atrazine in the insects and worms that live in the lake
The predatory birds such as herons and egrets have very high concentrations of atrazine in their blood. The birds prey on the frogs and small fish. What process explains the high atrazine level in the birds? a. antagonistic interaction b. Persistence c. chronic effect d. biological magnification e. none of these answers
Evidence of former surface volcanic activity is often found in the vast accumulations of lava called _______.
a - magma b - hot spots c - pyroclastic d - calderas e - flood basalts
A heavy rock and a light rock in free-fall have the same acceleration. The reason the heavy rock doesn't have a greater acceleration is that the
A) force due to gravity is the same on each. B) air resistance is always zero in free fall. C) inertia of both rocks is the same. D) ratio of force to mass is the same. E) none of the above
Which of the following is a type of radiation?
a. Delta b. Alpha c. Omega d. Theta