Explain two ways in which human activity increases the danger of drought and desertification

What will be an ideal response?


ANSWER: ?
A successful answer will include two of the following:
- damming of rivers or increased use of water upstream reduces soil moisture downstream.
- overgrazing by livestock or wildlife, concentrated in an area by fencing or artificial water sources, breaks up soil, compacts deeper soil, and reduces water infiltration.
- cultivation decreases soil moisture by exposing more soil to heat and air.
- topsoil disturbed by cultivation can dry and blow away, exposing deeper soils to evaporative processes.

Environmental & Atmospheric Sciences

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What goal did the Treaty of Tordesillas accomplish?

A) gave possession of Puerto Rico to the United States B) ended the Spanish-American War C) ended the Mexican revolution of 1910 D) divided South America between Spain and Portugal E) established the North American Free Trade Agreement (NAFTA)

Environmental & Atmospheric Sciences

Go to a local market that sells seafood. Determine how much of the fish being sold originated in another country

What will be an ideal response?

Environmental & Atmospheric Sciences

The root-shaped jumble at the base of a seaweed is called a(n) ____

A) ?holdfast B) ?blade C) ?stamen D) ?aerenchyma

Environmental & Atmospheric Sciences

Which of the following is correct of floodplains?

A) They rarely occur in a fluvial landscape created by an "old" river. B) They are erosional landforms. C) They often evolve after a stream has ceased downcutting at a significant rate. D) They are the areas of a stream where terraces are present.

Environmental & Atmospheric Sciences