How do detrital sedimentary rocks differ from chemical sedimentary rocks?
Detrital sedimentary rocks are made from weathered fragments of preexisting rocks. The cement may be new material but otherwise the material forming them predates the formation of the rock.
Chemical sedimentary rocks are made of new materials that precipitate from solutions and form rocks for the first time.
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Dung beetles live in regions where cattle graze, quickly burying and recycling cattle droppings
Because of the dung beetle's activities, breeding habitats and resources for disease-carrying flies are reduced, and the plants upon which cattle feed are nourished. The relationship between the dung beetles and the cattle is a type of ________. A) mutualism B) intraspecific competition C) parasitism D) interspecific competition
The kind of plastic with the highest recycling rate is
A. Polystyrene (PS) B. High-density polyethylene (HDPE) C. Polyethylene terephthalate (PET) D. Polypropylene (PP)
In dry climates _____ is a (are) prevalent process(es).
a - hydrolysis b - salt wedging c - frost wedging d - carbonation e - landslides
Which of the following was the largest project ever undertaken my the U.S. government?
A) the welfare state B) the Federal Interstate Highway System C) Hoover Dam D) the system of airports in the U.S. E) public transportation