Which of the following was a factor in helping to reduce total fertility rate of developed countries in the recent past?
a. lack of access to birth control
b. better medical care
c. increased dependence on farming for survival
d. lack of education for women
Answer: b. better medical care
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Find the tributary glacier that enters the South Sawyer Glacier from the south (the tributary enters just east of the word “Wilderness”).
The following questions are based on Map T-14, the “Sumdum (D-4), Alaska” quadrangle (scale 1:63,360; contour interval 100 feet). The map shows two glaciers entering the “Tracy Arm.” The Tracy Arm is a fjord just south of Juneau, Alaska (see Exercise 49 for a brief discussion of fjords). The “Sawyer Glacier” enters the Tracy Arm from the north and the “South Sawyer Glacier” enters the Tracy Arm from the southeast (57°52'27"N, 133°10'33"W). (a) What are the brown stripes along the sides of the glacier (shown with brown stippling)? (b) What are the brown stripes down the middle of the glacier? (c) Explain how these stripes came to be in the middle of the glacier.
Consider the isotherm map of the United States shown above. Which of the following is the best realistic estimate of the current temperature at the spot marked by an X?
A) 80°F B) 75°F C) 85°F D) 70°F
The limited development of soil horizons in the soil type pictured below occurs because
A. precipitation is limited. B. the subsurface is covered by permafrost. C. volcanic ash has penetrated very deeply beneath the surface in this soil type. D. leaf litter is so abundant that it tends to leach downward across all of the layers.
Which country leads the world in coal production and consumption by extracting and consuming approximately half of the world's annual coal yield?
A) United States B) China C) India D) Russia E) Canada