PPT: Soil Erosion And Conservation | Science Class 5 PDF Download

 Page 1


Soil Erosion
And
Conservation
Page 2


Soil Erosion
And
Conservation
Big rocks are broken down by the action of sun, wind
and water into smaller pieces till a powder is formed.
This process is called weathering. The fine powder
mixes with the remains of dead plants and animals
to form soil. It takes millions of years for rocks to
change into soil.
S o i l
Page 3


Soil Erosion
And
Conservation
Big rocks are broken down by the action of sun, wind
and water into smaller pieces till a powder is formed.
This process is called weathering. The fine powder
mixes with the remains of dead plants and animals
to form soil. It takes millions of years for rocks to
change into soil.
S o i l
Soil is made up of gravel, sand, clay particles and
humus. Humus is the remains of dead plants and
animals found in the soil. Soil also contains air, water
and microorganisms like bacteria and fungi.
S o i l
Page 4


Soil Erosion
And
Conservation
Big rocks are broken down by the action of sun, wind
and water into smaller pieces till a powder is formed.
This process is called weathering. The fine powder
mixes with the remains of dead plants and animals
to form soil. It takes millions of years for rocks to
change into soil.
S o i l
Soil is made up of gravel, sand, clay particles and
humus. Humus is the remains of dead plants and
animals found in the soil. Soil also contains air, water
and microorganisms like bacteria and fungi.
S o i l
Soil profile is the layers of soil. It has
three layers — topsoil, subsoil and
bedrock.
The uppermost layer of the soil is called
topsoil. It contains sand, clay, humus, air
and water. Humus provides essential
nutrients to the plants for growth.
Soil Profile
Page 5


Soil Erosion
And
Conservation
Big rocks are broken down by the action of sun, wind
and water into smaller pieces till a powder is formed.
This process is called weathering. The fine powder
mixes with the remains of dead plants and animals
to form soil. It takes millions of years for rocks to
change into soil.
S o i l
Soil is made up of gravel, sand, clay particles and
humus. Humus is the remains of dead plants and
animals found in the soil. Soil also contains air, water
and microorganisms like bacteria and fungi.
S o i l
Soil profile is the layers of soil. It has
three layers — topsoil, subsoil and
bedrock.
The uppermost layer of the soil is called
topsoil. It contains sand, clay, humus, air
and water. Humus provides essential
nutrients to the plants for growth.
Soil Profile
The middle layer is the subsoil. It
contains broken pieces of rocks and
water. It has very little humus.
The bottom layer is the bedrock. It is
deep inside the Earth and contains large
pieces of rocks. Not much water is
present in this layer.
Soil Profile