GED Practice

GED Science Review: Cycles in Ecosystems

Questions:
Directions: Choose or write the answer on a separate sheet of paper.

Question 1 refer to the information on the previous page.
  1. A town council wants to clear a large area of trees to build a new road. What evidence about carbon dioxide gas could residents use to prevent this from happening?

    Questions 2 through 4 refer to the following passage.

    When fog rolls into a redwood forest on the West Coast, the water droplets suspended in the fog condense on the trees' needles and then drip down the needles and trunk. Studies have sown that in one foggy night, a redwood tree can collect as much water as would fall during a heavy rainstorm. The redwoods' ability to capture water from fog is crucial to the other plants and animals in their habitat.
    Scientists have measured the fog dripping off redwoods in forested areas and also the fog dripping off humanmade fog collectors in deforested areas. In deforested areas, the air warms up and dries out quickly; the water droplets evaporate before becoming heavy enough to fall to the ground. Thus, much less water is captured from fog in the deforested areas than in the redwood forests.
    The fact that fog drip contributes to the water supply of an area is used by conservationists as an argument for saving stands of redwoods from logging. People whose wells and springs swindle during the dry summers are beginning to realize the role redwood play in their water supply.
  2. New redwood trees have been planted in an area. Which is the best prediction about what will happen there after a fog has lifted?
    • The water droplets will remain in the air.
    • The needles on the redwood trees will be dry.
    • The soil closer to the redwood trees will contain more water.
    • The water will evaporate from the needles of the redwood trees.
  3. Which evidence supports the conclusion that redwoods contribute water to their habitat?
    • Fog rolls into the redwood forests from the Pacific Ocean.
    • Water droplets are suspended in fog and intercepted by redwood trees.
    • Other plants and animals rely on the water supply provided by the redwoods.
    • Water from fog drips down redwood needles, branches, and trunks into the soil.
  4. Which conclusion provides the greatest motivation for the majority of people who live in a region with redwoods to oppose the logging of these trees?
    • The lumber industry provides jobs for people in the area.
    • Over the years, humans have destroyed most of the redwood forests.
    • Deforestation contributes to the drying up of local wells and springs.
    • Homes made of redwood lumber are long-lasting and easy to care for.
Answer:

  1. many answers
  2. The soil closer to the redwood trees will contain more water.
  3. Water from fog drips down redwood needles, branches, and trunks into the soil.
  4. Deforestation contributes to the drying up of local wells and springs.








Reference:


Complete Test Preparation for the GED Test 2014 by Steck-Vaughn