Light that is scattered and eventually reaches the earth's surface after having its direction changed is called ________
Fill in the blank(s) with correct word
diffused light
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A single, identifiable source of pollution is called a(n) ____________________
Fill in the blanks with correct word
The largest material that can be carried by a stream is carried as
A) bed load. B) suspended load. C) dissolved load. D) flow load.
Of the total energy intercepted at Earth's surface and available for work, only about ________ is actually fixed by photosynthesis
A) 1% B) 5% C) 10% D) 15%
Which of the following is true about global warming?
A. The hottest years on record occurred during the Little Ice Age. B. Climatic zones are shifting from the poles toward the equator. C. Nine out of ten of the hottest years on record have occurred since 2000. D. Overall, there is still a balance in the number of hot and cold years.