The crude birth rate is the number of live births per _____ persons in a given year

a. 50
b. 100
c. 500
d. 1,000
e. 10,000


D

Environmental & Atmospheric Sciences

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A scientific law is a brief statement illustrating a basic principle that has been repeatedly supported with observations and measurements

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Human activities can greatly accelerate ____________________ by increasing the rate at which nitrate- and phosphate- containing effluents enter aquatic ecosystems from their surrounding watersheds.

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences

Why does air flow into the center of a cyclone?

A) The center of a cyclone is a region of cold air. B) The center of a cyclone is a region of high air pressure. C) The center of a cyclone is a region of low air pressure. D) The center of a cyclone is near Earth's surface.

Environmental & Atmospheric Sciences

The Superfund, established to clean up hazardous waste sites in the United States, is a part of the ________

A) Superfund Authority Act B) Comprehensive Environmental Response, Compensation, and Liability Act C) Hazardous Waste Management Act D) Superfund Management and Liability Act E) Resource Conservation and Recovery Act

Environmental & Atmospheric Sciences