In general, how is the gradient of the present course different from the gradient of the boundary course? (In other words, is the present course steeper or less steep than the boundary course?)
The following questions are based on Map T-5, a portion of the “Jackson, Mississippi-Louisiana” topographic map (scale 1:250,000; contour interval 50 feet; dashed lines are supplementary contours at 25-foot intervals). This map shows the Mississippi River near the town of Vicksburg, Mississippi (32°49'56"N, 91°11'07"W). A color satellite image of this same region is shown in Figure 40-5 (scan the QR code for this exercise or go to the Lab Manual website and Exercise 40). The eastern bluffs of the Mississippi River floodplain can be seen in the southeast corner of the map. The dashed black line along the Mississippi River shows the state boundary between Mississippi and Louisiana. Notice that the “boundary course” of the Mississippi River is quite different from the present course of the river. Some of the changes were natural, others were artificial. There is an extensive set of artificial levees along the course of the river (shown with closely spaced brown tick marks).
What will be an ideal response?
Present course is steeper
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Active margins typically are located in the Atlantic Ocean
a. True b. False
From the 1930s to the 1950s, an X-ray machine called a shoe-fitting fluoroscope was common in shoe stores
People would try on shoes, stand with their feet in the machine, and allow the salesperson to view live images of the bones of their feet in the shoes! Sometimes the salesperson would reach down and adjust the person's shoes for a better image. These machines used X-rays and exposed the feet of customers to 5 to 30 seconds of radiation. Further, lower doses of radiation exposure also occurred within about 10 to 15 inches of the outside of the machine. If you were looking for medical problems resulting from the use of these fluoroscopes in shoe stores, where would you expect the greatest harm? A) customers who had their feet exposed to the X-ray device B) the salespeople who operated the machine to sell shoes C) salespeople who worked in nearby stores D) the salesperson who worked behind the cash register in the store
Why did the ancients believe that celestial objects had some influence over their lives?
What will be an ideal response?
A model is a useful simplification of a more complex reality
Indicate whether the statement is true or false