You are hopping on boulders beside a quiet stream that runs through a V-shaped valley. How did the boulders get there? The boulders were likely
A) carried in the stream then deposited at the stream bank.
B) produced when chemical weathering broke up the rock along the sides of the valley.
C) deposited along the stream bank by wind.
D) none of the above
B
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Some of the very large species of animals in the ocean, namely whale sharks and baleen whales, feed on plankton. How can they support their large size eating microscopic organisms?
Which strategy is recommended by environmental economists to help make the transition away from unsustainable economic growth?
A. Substitute ethanol or natural gas for oil. B. Move toward a steady-state economy. C. Continue economic growth for the jobs. D. Provide businesses with profits even though unsustainable. E. Provide tax supports to fossil fuel processors.
Fruit trees are particularly vulnerable to cold weather ____
a. when they are fruit-bearing b. when they are bare c. right after fruit have been picked d. when they are blossoming e. when the first leaves show up
The Resource Conservation and Recovery Act is a U.S. law enacted in the 1970s that ________
A) requires states to enact strict recycling standards B) restricts use of off-road vehicles in national parks C) reduces environmental levels of the 12 most toxic chemicals, called the "dirty dozen" D) requires states to pass bottle bills E) regulates how hazardous waste is managed