Unit 5 Review: Natural Resources

Soil samples were collected from various areas of the school campus. The students noticed that the upper layer of the soil in the wooded area was darker than the upper layer of the sandy playing field. Why would there be a difference in color in the upper layer of the two soil samples?

• The soil in the wooded area was made primarily of organic matter and not rock particles.

• The soil in the wooded area was made primarily of rock particles and not organic matter.

• There is less erosion on the playing field due to fewer plants growing on the field.

• There is more erosion in the wooded area due to more plants growing in the area.

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• walk to an from school everyday.

• ride her bike to and from school everyday.

• ask her mom to drive her to school every morning and pik her up every afternoon.

• ask Emily if she can ride with her to school every morning and back home every afternoon.

Soil that is formed where there is little organic matter, such as a desert, will most likely be --

• light-colored

• moist in texture

• nutrient-rich

• dark-colored

• Humus

• Gravel

• Clay

• Sand

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Which of the following should be used to help conserve nonrenewable resources?

• Oil

• Wind

• Coal

• Natural gas

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Even though water is a renewable resource, which statement best explains why it is important to conserve water?

• People need clean water to survive.

• Mountains will collapse if clean water is removed from them.

• Animals will hoard clean water for themselves.

• Air is difficult to breathe without clean water.

• Layer 1

• Layer 2

• Layer 4

• Layer 6

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• She should find an alternative to coke production.

• She should implement ways to conserve electricity.

• She should heat her home less in the winter.

• She should boycott industries that use coal.

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Fish and forests are considered --

• nonrenewable resources and are important to many ecosystems.

• renewable resources that take about the same amount of time to replenish themselves.

• renewable resources that must be conserved because they are subject to overharvesting.

• nonrenewable resources and are used by humans in similar ways.

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Lisa and her mother visited a salt marsh near her grandmother's house. Lisa looked down at the dirt and noticed that the soil in the salt marsh was --

• sandy and full of organic material.

• pure white and full of snail shells.

• chalky and full of stones.

• black and full of crystals.

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