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Soil Envirothon

Total questions: 20

Worksheet time: 34mins

Name
Class
Date
1.

What is a material found on the surface of the earth consisting of rock, sand, clay, dead plants, and animal remains?

a)

silt

b)

soil

c)

bedrock

d)

loam

2.

What is a soil made up of very small broken pieces of rock?

a)

soil

b)

loam

c)

silt

d)

bedrock

3.

Which soil has the smallest particles?

a)

clay

b)

loam

c)

sand

d)

silt

4.

What is the layer of rock that is below the soil?

a)

subsoil

b)

topsoil

c)

humus

d)

bedrock

5.

Which soil has the largest particles?

a)

clay

b)

sand

c)

loam

d)

silt

6.

What do plants and animals need to grow?

a)

nutrients

b)

soil

c)

loam

d)

humus

7.

What is the middle layer of soil which is a combination of soil and rocks?

a)

humus

b)

subsoil

c)

topsoil

d)

bedrock

8.

What is the layer under the Humus that provides support and nutrients to plants?

a)

humus

b)

bedrock

c)

topsoil

d)

subsoil

9.

What is the top layer of soil made up of broken down pieces of dead plants and animals?

a)

bedrock

b)

humus

c)

topsoil

d)

subsoil

10.

What soil is a mixture of sand, silt, and clay?

a)

soil

b)

silt

c)

clay

d)

loam

11.
Which of the following is NOT one of the three layers of soil?
a)
topsoil
b)
undersoil
c)
subsoil
d)
bedrock
12.
Humus is.....
a)
the dead parts of plants and animals in soil.
b)
A food we eat with pretzels.
c)
The tiny particles inside of soil
d)
The roots that come off of a plant and live in soil.
13.
Ellen grabs a topsoil sample in her hand. She rolls it into a ball. The soil feels gritty and the ball falls apart. What part of the topsoil most likely made the topsoil feel gritty?
a)
clay
b)
sand
c)
silt
d)
humus
14.
The texture of soil depends mainly on
a)
the types of plants that grow in the soil.
b)
the size of the particles in the soil.
c)
the color of the soil.
d)
the number of worms in the soil.
15.
You dig a small hole in the soil and the next day it rains. The hole fills with water, but does not empty even after several days of dry weather. What is the soil mostly made of?
a)
clay
b)
sand
c)
humus
d)
silt
16.
Organisms, like bacteria and fungi, that recycle nutrients back to the soil
a)
Eutrification
b)
legumes
c)
Nitrogen Fixing
d)
decomposers
17.

Organisms, like bacteria, insects and worms, that break down waste are called ___

a)

carnivore

b)

herbivores

c)

decomposers

18.

Detritivores have mouth parts.

a)

True

b)

False

19.

Decomposers release chemicals to break down the food.

a)

True

b)

False

20.
A decomposer?
a)
Eats dead plants or animals and breaks down to put nutrients in the soil
b)
Eats plants or other animals for food
c)
Makes its own food
d)
Machine that gathers trash

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