Air pollution is best defined as ________
A) suspended particles of gases that contain small amounts of solids and liquids
B) gases or particles present in high enough concentrations in the atmosphere to harm humans, other organisms and structures
C) any gases in Earth's atmosphere in trace amounts
D) small particles in the atmosphere arising from volatile organic compounds
E) organic chemicals that can vaporize into the air
B
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Which of these countries has the largest known supply of tungsten?
A. China B. United States C. Canada D. Monaco
The boundary between the zones of accumulation and wastage is called the ____________________
Fill in the blank(s) with correct word
Which of the following is a local area's short-term temperature, precipitation, and humidity?
a. climate b. weather c. biomes d. ecosystems e. currents
Temperatures become more variable and precipitation decreases as one travels from west to east from Europe into Asia. This is best explained by
A. prevailing westerlies and the orientation of mountain chains. B. the moist eastern side of the subtropical high. C. monsoonal winds bringing relatively warm moist winds in the winter. D. the moist western side of the subtropical high.