Suppose you deflate a bicycle tire by depressing the air valve. Why does air rush out of the tire? After the air stops rushing out of the tire, is the tire empty? Explain your answer.
What will be an ideal response?
Answers may vary.
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Historically, which of the following considerations in setting standards for toxic exposure has been emphasized the least?
A. Different members of the population have different sensitivities to toxins B. Individuals in the human population have been exposed to many different kinds of toxins that may have additive or synergistic effects C. Including information about how toxins affect natural ecological systems D. Including information about both chronic and acute exposures to a toxin E. All of these considerations have been used and are important in setting policy
Open dumping is a waste disposal method that is
A. never implemented because of associated risks of groundwater pollution. B. common in most developed countries. C. predominant in most developing countries.
Which of the following is an accurate statement about tornadoes?
A. They cannot occur within hurricanes. B. They do not occur outside North America. C. After they dissipate they form a wall cloud. D. They are associated with mesocyclones.
The Mediterranean climate is also called the ____
a. ?humid subtropical (Cfa) b. ?marine (Cfb) c. ?humid continental with hot summers (Dfa) d. ?dry-summer subtropical (Cs) e. ?semi-arid (BS)