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Soil ( Grade -7)

Total questions: 40

Worksheet time: 32mins

Name
Class
Date
1.
What is a mixture of weathered rock, decayed organic matter, mineral fragments, water, and air called?
a)
soil
b)
organic matter
c)
decomposed matter
2.

Planting of more trees is known as _______

a)

afforestation

b)

Deforestation

3.

What kind of climate has the fastest weathering?

a)

cold and dry

b)

cold and wet

c)

hot and dry

d)

hot and wet

4.

The picture shows different sizes of soil particles. Which would have the largest pores?

a)

sand

b)

silt

c)

clay

d)

All would have the same size pores

5.

Which soil horizon are you most likely to see when you dig a small hole in the ground and see mostly dark-colored soil?

a)

C-horizon

b)

B-horizon

c)

A-horizon

d)

the 3 horizons are all intermixed

6.

Which layer of soil has the least amount of nutrients?

a)

Black

b)

Brown

c)

Yellowish

d)

Grey

7.

Which environment would have the fastest rate of erosion?

a)

Left - with grass

b)

Middle - with dead leaves and sticks

c)

Right - just sediment

d)

The rate of erosion is the same in all three examples.

8.

Why is soil fertility important?

a)

It shows how well the soil can work over winter.

b)

It determines how well the soil can support plant life.

c)

It is the amount of sand, silt, and clay in soil.

d)

It can help the soil hold more water.

9.

Agents of weathering of

a)

Heat

b)

Wind

c)

Rain

d)

All of the above

10.

What is humus?

a)

Bacteria

b)

Fungai

c)

Organic matter

d)

Inorganic matter

11.

Name the particles that is smallest in size

a)

Silt

b)

Sand

c)

Gravel

d)

Clay

12.

The top most layer of soil contains

a)

Rock particles

b)

Humus

c)

Nitrogen

d)

Oxygen

13.

Vertical section through the soil showing different layers is called

a)

Types of soil

b)

Soil texture

c)

Soil profile

d)

None of the above

14.

A horizon is also called

a)

Substratum

b)

Bedrock

c)

Topsoil

d)

Subsoil

15.

_______layer of soil is not porous

a)

Subsoil

b)

Substratum

c)

Top soil

d)

Bedrock

16.
Decayed organic material in soil is called______.
a)
Litter
b)
Silt
c)
Humus
d)
Clay
17.
Which is NOT a layer of soil?
a)
bedrock
b)
topsoil
c)
undersoil
d)
subsoil
18.
Which type of soil holds the most water? 
a)
Clay 
b)
Sand 
c)
Loam 
19.

Soil Formation is -

a)

Slow process

b)

Fast process

c)

Rapid process

d)

None of these

20.

soil is important for

a)

agriculture

b)

food

c)

plants

d)

All of the above

21.
Which layer of soil are these roots growing in?
a)
subsoil
b)
topsoil
22.
What is bedrock?
a)
The movement of weathered rock.
b)
The hardest and lowest layer of soil.
c)
Loose material that covers much of Earth's surface.
23.
What is humus?
a)
The decayed remains of plants and animals.
b)
The loose material that covers much of Earth's surface.
c)
Something you eat! 
24.
What type of soil is made from a mixture of sand, silt, and clay?
a)
sand
b)
silt
c)
clay
d)
loam
25.
Soil takes many ________ to form.
a)
days
b)
months
c)
years
26.
This type of soil is made of larger pieces of rock and doesn't hold water well. 
a)
loam
b)
clay
c)
silt
d)
sand
27.
Why are nutrients good in the soil?
a)
they help the plants grow healthy
b)
they provide a place for the roots to grow
c)
they soak in all the water
28.
Soil is good for all of the following EXCEPT:
a)
making a compost heap
b)
planting a garden
c)
providing food to people and animals
d)
making a computer work
29.
What does “decaying” or “decomposing” mean?  
a)
The layer under the grass
b)
Breaking down or falling apart
c)
To grow new life
30.
Can an chicken bone decompose and become a part of the soil? 
a)
Yes 
b)
No
31.
Can a tin can decompose and become a part of the soil? 
a)
Yes 
b)
No
32.
What are the 3 layers of soil (in order from top to bottom) that we have learned?
a)
Subsoil, Bedrock, Topsoil
b)
Topsoil, Subsoil, Bedrock
c)
Topsoil, Humus, Tundra
33.
This is the mixture of rock particles, minerals, decayed organic material, air, and water.
a)
Soil Composition
b)
Soil Permeability
c)
Soil pH
d)
Soil Profile
34.
This is determined by the relative proportions of particle sizes that make up the soil. Names for this include, loam, sandy clay, or other descriptive terms.
a)
Soil Permeability
b)
Soil pH
c)
Soil Profile
d)
Soil Texture
35.
The largest of these is sand; silt is smaller than sand; and clay is the smallest of all.
a)
Soil Composition
b)
Soil Particle Size
c)
Soil Permeability
d)
Soil Texture
36.

Humus has so much nutrients that what creature is found here?

a)

Bats

b)

Earthworms

c)

Birds

d)

Cows

37.

What color is soil?

a)

Hot pink

b)

Navy blue

c)

many colors (red, brown, gray, yellow, black, etc.)

d)

Sparkly

38.

What is weathering?

a)

Wearing down and breaking apart rocks

b)

Rain

c)

soil when it gets wet

d)

Erosion

39.

What is erosion?

a)

When wind, water, and weather change a natural substance over time

b)

When water gets into soil

c)

When it hails

d)

Snow that turns black.

40.

What is an example of protecting topsoil?

a)

Eating it

b)

Throwing it at our friends

c)

Planting crops in it

d)

Rolling in it

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