Discuss two of the many serious environmental crises that occurred during the 20th century that alerted North Americans to the importance of becoming more aware of environmental limitations
What will be an ideal response?
The student can mention two of the following from the text:
-- 1927 flood of historic magnitude on the Mississippi River that caused hundreds of deaths, and millions of dollars in damage. It also called attention to the difficulties in managing North America's water resources through the construction of dams, levees, and other flood control technology.
-- 1930s Dust Bowl, which was caused by warm and windy weather, and inappropriate agricultural practices, that focused nation attention on soil erosion and conservation.
-- The impact of heavy industry on air quality that received national attention in 1948 when an inversion layer of highly polluted air settled over the steel community of Donora, Pennsylvania, near Pittsburgh that resulted in 20 fatalities and caused thousands of residents to develop respiratory illnesses.
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A student commented, "A metamorphic rock must have a greater relative age than a sedimentary rock." Is the student using the term "relative age" here in the correct context, and why or why not?
A) No. Relative age must compare the age of at least three things. B) Yes. The ages of the rocks are ordered in relation to each other. C) No. Relative age should state a specific number of years in which the event occurred. D) Yes, the term is used in the correct context, however knowing how long ago these types of rocks formed would be useful.
By what name is the large peninsula of Turkey, located wholly in Asia, known?
A) Maghreb B) Levant C) Middle East D) Anatolia E) Persia
Downbursts from a thunderstorm ____
a. ?create high surface winds that extend in every direction from the center of the burst b. ?are a hazard to air traffic but dissipate before reaching the ground c. ?can only form from pockets of cold, dry air d. ?are most common on the trailing edge of a thundercloud e. ?are a wind effect that is not linked to rainfall
The Hadley cell is referred to as a(n) ____________________ cell because it is driven by energy from the Sun as warm air rises and cold air sinks
Fill in the blank with correct word.