What is the feature numbered 1 in the upper part of this figure?
A. lateral moraine
B. U-shaped valley
C. terminal moraine
D. cirque
Answer: D
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Atmospheric pollution is the worst when
A. coal is burned. B. uranium undergoes fission in a nuclear reactor. C. natural gas is burned. D. geothermal heat is used to generate electricity.
The chlorinated fluorocarbons molecules are acting as a(n) ________ by converting hundreds of thousands of molecules before they are inactivated
A) catalyst B) aerosol C) active site D) acid E) base
How would we use isotopic ages to infer the ages of the upper and lower unit in this diagram?
A. An age on the dike would not help us because it is an igneous rock. B. The upper unit would be older than an age determined on pebbles of the dike in that unit. C. The dike is younger than the lower unit but older than the upper unit. D. The lower unit would be younger than an age on the crosscutting dike.
Ecosystems are connected by ________
A) individual species competing for space with other species in the ecosystem B) energy cycling and nutrient flow C) the essential flow of water through the ecosystem D) the movement of pollutants between ecosystems E) the flow of energy and matter through the ecosystem