Algal blooms result from which type of surface water pollution?
A. heavy metal
B. nutrient
C. sediment
D. PCB
Answer: B
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Under what conditions (if any) might you record a station pressure of 750 hPa?
What will be an ideal response?
Ionizing radiation is characterized by which of the following?
A) its energy B) its intensity C) both a and b D) neither a nor b
What is meant by carbon sequestration?
A. Carbon is released from melting permafrost. B. Carbon is removed from the surface environment and placed in storage. C. Excessive amounts of carbon dioxide are released into the atmosphere by volcanic activity. D. Heat is absorbed by atmospheric carbon dioxide.
If you discover the fossil remains of archaeocyathids in a rock outcrop, you can be certain that
the rocks are from the a. Cambrian. d. Permian. b. Ordovician. e. Silurian. c. Devonian.