This agent of erosion and deposition is most effective on fine sediment that is dry.
A. frost action
B. wind
C. desertification
D. flash floods
E. dry wash
Answer: B
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Which of the following describes how the atmospheric greenhouse effect is mainly produced?
A. Gases in the atmosphere absorb and re-emit ultraviolet radiation. B. Clouds absorb and re-emit visible light. C. Gases in the atmosphere absorb and re-emit infrared radiation. D. Gases in the atmosphere absorb and re-emit visible light.
In a truly free-market economic system no company or small group of companies would control the prices of any goods or services.
Answer the following statement true (T) or false (F)
Much of the world's supply of iron comes from banded iron deposits that formed between 1.8 and 2.6 billion years ago. In addition to being a source of iron, why are these deposits important in geology?
A. provide evidence of the earliest known sedimentary rocks B. provide proof of the first known ice ages C. represent the point in time when free oxygen was becoming more abundant D. mark the point in history when marine mammals were first beginning to evolve E. all of the answers listed here
The Earth and the rest of our solar system formed
A. 450 million years. B. 10 to 15 billion years ago. C. 4.5 billion years ago. D. 3.8 billion years ago.