List the properties that determine the rate of degradation of toxicants
What will be an ideal response?
Environmental factors such as temperature, moisture, available oxygen and sun exposure can affect the rate of degradation of toxicants. The chemistry of the toxicant would determine how it is degraded and to what extent these environmental factors affect its degradation. Atrazine is an example of a toxicant which has variable persistence, depending upon environmental conditions. Biodegradable toxicants are quickly broken down under conditions that favor the sustenance of the organisms degrading them. DDT, PCBs, and toxicants used in the manufacture of plastics, however, resist breakdown under most environmental conditions due to their chemical composition.
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The type of rock shown in this photograph is
A) conglomerate.
B) breccia.
C) sandstone.
D) shale.
Blow on your hand with your open mouth and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is
A) warmer still. B) cooler. C) neither warmer nor cooler.
What type of information about the ocean are satellites most likely to provide to scientists?
A) ?amount of phytoplankton and dissolved organic matter B) ?pH of the ocean in different locations C) ?sea floor bathymetry D) ?sea floor sedimentation rate
Alfred Russel Wallace's zoogeographic realms roughly correspond to continental plate boundaries
Indicate whether the statement is true or false