A rock that is 90 million years old comes from the ________ Period

A) Cretaceous
B) Mesozoic
C) Phanerozoic
D) Jurassic


Answer: A

Environmental & Atmospheric Sciences

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IPM (integrated pest management) is becoming widespread as a way to control pests. This method

A. first uses chemical controls to maximize yields. B. has been shown not to be effective in commercial agriculture. C. first uses cultivation such as intercropping, then uses biological controls, and then uses chemical controls in hard hit areas. D. uses a mixture of several modern pesticides applied at one time. E. first uses chemical controls, then biological controls and then cultivation.

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"New towns" are designed to

A. Improve the efficiency of industrial areas in urban centers B. Accommodate the reliance most people have on the automobile C. Incorporate open space with the convenience of living in an urban area D. Separate income classes to prevent crime E. Urbanize rural communities

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Which processes would change a metamorphic rock to an igneous rock?

A. Melting and crystallization B. Weathering, transport, and lithification C. Increased temperature and pressure

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Which of the following is commonly associated with tributaries?

A. an increase in the discharge in the main river B. rapids when the tributary joins the main river C. delivery of sediment to the main river D. All of these choices are correct.

Environmental & Atmospheric Sciences