1) What is the upper most layer that covers the Earth called? a) ground b) dirt c) Layer d) soil 2) Soil Horizons are the ___________ that make up soil a) plants b) layers c) organic material d) non-living things 3) Organic matter is made up of a) worms, insects and small animals b) paper and plastic c) dying plants and animal remains d) garbage 4) Soil is made up of broken rocks and minerals, as well as organic material a) True b) False 5) Soil is very important for supporting all _______ on earth. a) people b) plants c) animals d) a, b and c 6) Soil helps give us fresh air a) True b) False 7) If the Earth didn't have soil, a) Trees could not grow b) People would die from lack of oxygen c) Animals would not have food d) a,b, and c 8) What layer comes after the top Organic Material layer (or Humus)? a) Subsoil b) Topsoil c) Bedrock d) Parent Material 9) Which layer is made of clay, sand and minerals? a) Subsoil b) Topsoil c) Bedrock d) Parent Material 10) Which layer is made of solid rock? a) Subsoil b) Topsoil c) Bedrock d) Parent Material 11) Which layer is made of mostly large rocks and some soil? a) Subsoil b) Topsoil c) Bedrock d) Parent Material 12) Creatures that live in the soil help the soil by a) making the soil smell nice b) making the soil hard c) Giving the soil nutrients d) making the soil change colour 13) Earthworm have no skeleton, no eyes and no nose a) true b) false 14) An Earthworms job is to a) add air to the soil b) be put on a fishing hook to catch fisho they can c) eat dead plants and break them down d) a and c 15) Most Soil is made up of three different particles (tiny pieces). They are: a) stones, twigs and organic matter b) Sand, silt and clay c) bugs, worms and other insects d) Playdoh 16) The largest soil particle is a) clay b) silt c) Sand d) powder 17) The smallest soil particle is a) clay b) silt c) Sand d) powder 18) Soil erosion is caused by: a) animals b) humans c) wind and water d) a, b and c 19) Which does not cause soil erosion? a) insects and bugs b) humans c) wind d) water 20) Which answer is an example of soil erosion NOT caused by humans? a) Cutting down trees b) rainfall moves soil and washes it away c) Digging soil to plants seeds d) construction 21) Planting trees make it harder for soil erosion to happen. a) true b) false 22) The roots of a plant help to keep soil from being blown or washed away. a) true b) False

Soil in the Environment

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