Which of the following describes the apparent change in the average global temperatures over the past 100 years or so?
A. They have increased slightly.
B. They have fluctuated widely but shown no overall change.
C. They have decreased slightly.
D. They have remained constant.
Answer: A
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If a stream-cut canyon is deep and narrow, which of the following is most likely to be true?
A) Rocks in the canyon walls are relatively hard and easy to erode. B) The stream is probably close to its base level. C) Downcutting is occurring faster than widening. D) The stream contains mostly small clasts, such as silt.
Using solar energy is not quite so simple because converting light into heat remains quite inefficient.
a. true b. false
How could the Himalayan Mountains be getting taller?
What will be an ideal response?
Carbon monoxide forms in forest fires
Indicate whether the statement is true or false