Fully oxygenated waters contain as much as ________ ppm oxygen.
A. 12
B. 25
C. 5
D. 100
E. 2
Answer: A
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Answer the following statement(s) true (T) or false (F)
1. India is a meat exporter. 2. Bhutan encourages tourism. 3. Economic development in the mountain countries is hampered by physical and political isolation and by internal conflicts. 4. Before 1992, Afghanistan had over 200 factories. 5. The Maldives face drowning by a rising ocean level as global warming proceeds.
Which of the following scientists is not closely associated with early studies of radioactivity?
A) H. Becquerel B) M. Curie C) A. Einstein D) E. Rutherford
In reality, biomes
a. are not uniform but consist of a mosaic of patches each with somewhat different biological communities b. are not uniform but consist of a mosaic of patches, each with the same biological communities c. are very uniform, but can have normal variations in temperatures from one region to another d. are very uniform in order to resist environmental disruptions e. are very diverse in order to resist environmental disruptions to the sameness of all communities in the biome
The Earth's interior can be divided into three distinct layers. Which layer is the densest one?
a. Crust b. Mantle c. Core d. They exhibit the similar density