Which of the following are threats to the Great Barrier Reef?
A) coral bleaching
B) sediment pollution
C) shipping accidents
D) large net fishing
E) all of the above
Answer: E
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Where has the Russian Domain dumped its nuclear wastes?
A) in the Sea of Okhotsk B) in the Arctic Sea C) in Siberia D) off the northern island of Novaya Zemlya E) at an unregulated dump outside the city of Chernobyl
According to the equation of state p = ?RT,
A) an increase in density requires an increase in pressure or a decrease in temperature or both B) an increase in density requires an increase in both pressure and temperature C) an increase in density requires a decrease in pressure but not temperature D) an increase in density requires a decrease in both pressure and temperature
The break-even point between the production and consumption of organic material is termed
A) net primary productivity. B) compensation point. C) net photosynthesis. D) free air CO2 enrichment.
The beginning of the Northern Hemisphere spring occurs when the subsolar point is at the Tropic of Cancer
Indicate whether the statement is true or false