Salinization of soil is most widely caused by
a. people irrigating farms with ocean water.
b. too much rain in tropical areas.
c. farmers incorporating salt into their fertilizer.
d. evaporation in arid climates pulling salt up from lower soil horizons.
Answer: D
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In the United States, the term ________ refers to groups with supposedly distinct ancestry and cultural traditions, such as African Americans, Mexican Americans, Chinese Americans, Japanese Americans, German Americans, and Polish Americans
A) race B) ethnicity C) nationality D) tribe E) country of origin
Using the Periodic Table, what can you say about the element silicon (Si)?
A. it has 14 electrons in the outer shell B. it has 3 electron shells and 4 electrons in the outer shell C. it has 2 electron shells and 2 electrons in the outer shell D. it has 4 electron shells and 3 electrons in the outer shell E. None of these choices are correct.
The most sustainable way to drive a car would be to use
A) an all-electric car using electricity from a windmill or solar photocells. B) an all-electric car using electricity from any power supply. C) a hydrogen fuel cell using hydrogen produced by a nuclear power plant. D) a hybrid electric car that generates electricity when slowing down.
If the axial rotation of Earth slowed, the day-to-night temperature variation on Earth's surface would decrease.
Answer the following statement true (T) or false (F)