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Free GED SCIENCE Exam Braindumps (page: 17)

Page 16 of 76
PDF with 75 Questions

A person can determine the shape of a particular landscape by studying the contour lines on a topographic map of that region. Contour lines connect points that have the same elevation.
Contour lines that are spaced relatively far apart from one another indicate more gradual elevation change and relatively level land. More closely spaced contour lines indicate more rapid elevation changes and steeper slopes. The diagram below shows the contour lines on a topographic map and their elevation (in feet).

Which geographic feature is most likely illustrated in the map above?

  1. river or lake
  2. hill or small mountain
  3. valley
  4. underground mine
  5. level land

Answer(s): B



Heart rate is affected by the body size of an animal. The longer the path for blood to travel through the body, the longer the time between heartbeats. The graph below illustrates the heart rates of selected animals, the largest of which is the elephant, and the smallest of which is the mouse.

Based on the information and chart, which statement is the best interpretation of the relationship between heart rate and body size?

  1. There is no relationship between heart rate and body size.
  2. The larger the animal, the faster the heart rate.
  3. The longer the pathway for the blood to flow through the body, the faster the heart beats.
  4. Humans always have the slowest heart rate.
  5. The smaller the animal, the faster the heart rate.

Answer(s): E



A water softener is an ion exchange resin contained in a tank. The resin trades its sodium ions for the calcium and magnesium ions of the hard water.


Why is a water softener sometimes installed in homes?

  1. to reduce the health risk of dietary sodium
  2. to increase the mineral content of drinking water
  3. to increase the production of lime in the home
  4. to reduce the buildup of mineral deposits
  5. to create a flavored drinking water

Answer(s): D



A contour line is a line passing through points with the same altitude above sea level. A steep slope is represented by closely spaced contour lines; widely spaced contour lines show a more gradual incline.
A topographic map displays these contour lines and helps outline the shape of the landscape locating hills, cliffs, and depressions.
Based on the topographic map at the left, if a person wants to travel on level ground as much as possible, which would be the easiest path between points A and B?
Exhibit:


Exhibit

  1. A ­ D ­ C ­ B
  2. A ­ E ­ F ­ B
  3. A ­ C ­ B
  4. A ­ C ­ F ­ B
  5. A ­ F ­ C ­ B

Answer(s): B






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