Which of the following is the definition for a scientific hypothesis?

A) The gathering of data through observations
B) A tentative explanation used to explain observed activities
C) A well-tested and widely accepted view that explains observable facts
D) An educated guess


Answer: B

Environmental & Atmospheric Sciences

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Floodplains usually contain

a. highly productive wetlands b. debris that has been deposited during floods c. high concentrations of agricultural chemical runoff d. pest insect populations e. nutrient poor soil

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Projected climate changes, such as warmer temperatures, in Southwest Asia and North Africa will likely decrease the amount of runoff in the region, further stressing stream and rivers and reducing hydroelectricity potential and diminishing water

available for the region's increasingly urban population. Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Subsidies and tax breaks to assist companies with using resources to run their businesses are ____.

A. helpful to the environment B. not helpful to the economy C. not actually helpful to these companies D. not helpful to the environment E. not helpful to individuals

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In a Lewis structure, which of the following atoms can have more than eight electrons associated with it?

A) C B) N C) O D) none of these

Environmental & Atmospheric Sciences