Continental masses that presently are covered by continental glaciers: _________, _________. Fill in the blank(s) with the appropriate word(s)
Antarctica, Greenland
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Using the graph below, construct a topographic profile from Point “A” to Point “B.” Plot the index contours, as well as the crest and bottom of the fault scarps. The vertical exaggeration of the profile is approximately 6.7x.
The question is based on the “Mt. Dome, California” quadrangle (Map T-24; enlarged to scale 1:48,000; contour interval 40 feet). Three prominent fault scarps can be seen running north to south across the map, and will be referred to as the “western” fault, the “central” fault, and the “eastern” fault. These faults scarps are the result of normal faulting. Figure 36-5 is a stereogram of the same region (in Figure 36-5, north is to the left side of the page). Hint: Because the contour lines are very close together, it may be difficult to discern the elevation of the top and bottom of a scarp. To determine these elevations, find an index contour in the gently sloping area between two scarps, and then count the number of contour lines to the top or bottom of a scarp.
Which is not true of Earth's atmosphere?
A) It is the sum of all the exhalations and inhalations of life on Earth. B) We consider the top of the atmosphere to be 32,000 km (20,000 mi.) from Earth. C) It protects us from deadly UV radiation, yet lets light through. D) Its temperatures range from -90°C (-130°F) degrees to 1200°C (2200°F). E) The principle substance is air, a mixture of many gases that behaves like a single gas.
There is uncertainty among scientists over whether projected atmospheric warming will increase the frequency and intensity of tropical storms and hurricanes. In 2010, a World Meteorological Organization panel of experts concluded that projected atmospheric warming is likely to lead to ____ hurricanes and typhoons.
A. fewer and weaker B. more but weaker C. fewer but stronger D. more and stronger E. no change in the strength or frequency of
Which of the following statements is NOT true with respect to dams and reservoirs?
A. stream discharge becomes fairly uniform, which harms aquatic ecosystems. B. sediment is trapped behind dams and slowly fills in reservoirs. C. dams are generally not effective at flood control and are mainly used to generate electricity. D. reservoirs serve as an important source of fresh water. E. water released from reservoirs is cooler than a natural stream, which harms aquatic ecosystems.