The residence time for water in any of Earth's principal reservoirs can be calculated by dividing
What will be an ideal response?
> Reservoir volume by rate of water supply
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You examine an igneous rock that has mineral grains which are 2.5 cm in size (large), and are primarily dark green and black color. Which statement concerning the rock is not accurate?
A. A likely rock name for this specimen would be a gabbro. B. The textural classification of the rock would be coarse grained. C. This rock likely has minerals with chemical elements like iron and magnesium in them. D. The composition of the magma that formed this rock would be Felsic. E. This rock would be classified as a plutonic rock.
Which of the following is NOT true about groundwater flow?
A. Water moves from areas where the water table is highest to areas where it is lowest. B. In some igneous groundwater reservoirs, flow is determined by the orientation of fractures. C. Excess pumping from wells can cause subsidence and reduction of porosity. D. A decrease in the gradient (slope of the water table) increases the velocity.
Our Sun is current in the ________ stage of solar evolution.
A) variable B) giant C) main sequence star D) planetary nebulae
What are the two main approaches the government uses to influence food production?
A. eliminating subsidies and controlling prices B. importing needed crops and controlling pricing C. providing subsidies and recycling D. eliminating subsidies and importing needed crops E. controlling prices and providing subsidies