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WorksheetsGR 7 COMPOSITION OF SOIL
Total questions: 14
Worksheet time: 8mins
Which of the following is the largest mineral particle found in soil?
silt
sand
dirt
peat
Which of the following is the largest mineral particle found in soil?
silt
sand
dirt
peat
Which part of topsoil contains decayed plant and animal matter?
silt
sand
humus
clay
Which activity will most likely increase soil fertility?
Worms are removed from the soil.
A tree dies and decays.
Plastic is buried in the ground.
A tree is cut for lumber.
Read the passage about earthworms.
EARTHWORMS: Earthworms are very important for producing healthy, mature soil. Worms speed up humus
production by eating decaying material. In fact, worms are put into compost piles to help make natural fertilizer for crops. Worms leave holes and tracks in the soil that are
filled with water when it rains. Worms loosen
the top layer of soil making it ideal for thriving
plants.
How do earthworms help create organic material
for healthy soil?
Worms eat decaying material and break it into
smaller pieces.
Worms dry out the soil by drinking the water in
layers.
Worms break up rocks into smaller pieces.
Worms help with chemical weathering.
In which horizon do most animals such as bugs live?
Humus
Topsoil
Subsoil
Parent Material
Bedrock
