Why does the amount of water that flows in a river vary from year?

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How does the speed of the rotation of the Earth present itself?

What are the possible effects of a frontal system entering an area? Select all that apply. a. gentle rain b. sea breeze c. clearing skies d. thunderstorms E. a change in air temperature

As of 2005, United States policies to respond to natural disasters such as Hurricane Katrina proved to be inadequate. T F

The boundaries between landscape regions are usually indicated by sharp changes in

Which of the following is true about ecosystems?

1. When governments seek a favorable trade balance, they want A to raise taxes on exports B imports to equal exports C to export more than they import D to import more than they export

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3) Which of the following may move and cause an earthquake to occur? A: Asthenosphere B: Lithosphere C: Plate D: Mantle

What statement best describes the relationship between power and authority? A. Authority is a type of power used only in democracies. B. Authority is the ability to use power legitimately. C.