Standard 1.

Match every role of the soil to the corresponding picture:

1. Provide habitat for animals and

organisms that live in the soil.

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2. Modify the atmosphere by

releasing and absorbing gases

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3. Serve as media for growing all

kind of plants.

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4.Absorb, hold, release and purify

most of the water

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Fill in the blanks with the correct answer:

5. The A Horizon is called topsoil is very rich in nutrients. This layer is important because:

• Complex mixture of organic matter, minerals, gases, liquids and organisms.

• Hard

• Is very rich in nutrients and is where most of the organisms live.

• Is rich in Minerals.

6. The B Horizon is a hard and compact layer. This layer is important because

• Complex mixture of organic matter, minerals, gases, liquids and organisms.

• Is very rich in nutrients and is where most of the organisms live.

• Is rich in Minerals.

• A mixture that gives to the living things food, home, and a place to grow.

7. The ____________ is made of decomposed leaves, organic matter and humus.

• Complex mixture of organic matter, minerals, gases, liquids and organisms.

• O Horizon.

• Is rich in Minerals

• Hard

8. The bedrock is the last layer of soil, this one is very __________.

• O Horizon.

• A mixture that gives to the living things food, home, and a place to grow.

• Is rich in Minerals.

• Hard.

Standard 2.

Choose all the correct answers:

9. Soil pollution is when humans introduce:

• Garbage into the soil

• Humus into the soil

• Chemicals into the soil

• Other substances into the soil

• Living things into the soil

10. Soil pollution causes:

• Nothing, it is normal.

• Harm to living things.

• Damage to the environment.

• Death to some living things.

• Health to plants.