Present-day hominids arose from the ____________________ and ____________________ groups. Fill in the blank(s) with the appropriate word(s)

Some pollutants are able to persist in the environment for thousands of years

Indicate whether the statement is true or false

What happens when air is saturated?

a. The air temperature equals the wet-bulb temperature. b. The relative humidity is nonetheless less than 100 percent. c. The air temperature is higher than the dew point temperature. d. An increase in temperature will cause condensation to occur. e. The temperature increases.

How much of Mount St. Helens was blown off during the 1980 eruption?

A. 40 meters B. 4,000 meters C. 400 meters

The atmosphere is primarily composed of

A. nitrogen, water vapor, and rare amounts of other gases. B. helium and nitrogen. C. hydrogen, helium, ammonia, and water vapor. D. oxygen and carbon dioxide. E. nitrogen, oxygen, and rare amounts of other gases like carbon dioxide.