Peds give the soil a particular structure and are clumps of individual mineral particles
a. True
b. False
Indicate whether the statement is true or false
True
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The subtropical jet stream
A) is found in the lower troposphere. B) is typically found at about 45 degrees latitude. C) is a product of the Coriolis force and conservation of momentum. D) feeds the polar easterlies. E) all of the above
In Japan, the presence of ducks and the aquatic fern Azolla in rice cultivation has shown that ________
A) invasive species diminish rice yields B) ducks and other birds must be eliminated from rice fields C) the ferns provide an excellent food for ducks D) GM crops such as rice cannot succeed without ferns to provide shade and ducks to provide pollination E) restoring portions of the biodiversity of a natural ecosystem increases crop yields and profits
The process of secondary succession would typically follow a forest fire
Indicate whether the statement is true or false
A type of mechanical weathering is ____ and a type of chemical weathering is ____
A)frost action; pressure release B)pressure release; salt crystal growth C)thermal expansion and contraction; salt crystal growth D)oxidation; activities of organisms E)salt crystal growth; hydrolysis