What is the main reason why the oceans are salty?
A. blowing salt crystals become incorporated into clouds and falls with the rainfall
B. the early oceans were salty because comets are dirty snowballs
C. salt deposits that formed early in Earth's history become dissolved by modern oceans
D. weathering of rocks releases chemical elements that make the oceans salty
Answer: D
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The amount of pressure that a given gas contributes to atmospheric pressure is that gas's ________
Fill in the blank(s) with the appropriate word(s).
In a temperature inversion, air temperature ____
A) increases with increasing height B) decreases with increasing height C) increases with decreasing height D) remains constant with increasing height
To measure temperature, ASOS uses an electronic ____________________ thermometer
Fill in the blank(s) with correct word
Which U.S. state was the nation's leader in coal production as of 2014?
A) Pennsylvania B) Wyoming C) Texas D) West Virginia