True/False: We expect sinking motion and clear skies to be associated with a surface high-pressure system.
a. True
b. False
a. True
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_____ are solid particles that serve as cores for the formation of ice crystals.
a. dew b. freezing nuclei c. hail d. advection e. snow
What is the main reason why the oceans are salty?
A) The early oceans were salty because comets are dirty snowballs. B) Salt deposits that formed early in Earth's history become dissolved by modern oceans. C) Weathering of rocks releases chemical elements that make the oceans salty. D) Blowing salt crystals become incorporated into clouds and falls with the rainfall.
Two countries share the area of a large tropical island. Flying along the border of the two nations, you notice that to the left of the border, one nation is heavily deforested and eroded, while in the nation on the right the area is richly vegetated
. Compared to the country on the left, the country on the right is more likely to have A) higher rates of human population growth. B) higher rates of poverty. C) greater political and economic stability. D) greater reliance upon natural ecosystems for trade.
If theta is the angle of inclination of a slope and W is the weight of a particle resting on the slope, the downslope component of the weight acting parallel to the slope would be expressed as:
a. W sin theta b. W cos theta c. W tan theta d. none of the above