process of soil formation with drawing
ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKS?
Pocesses of Soil Homation
2. On cooling, at night time, the outer
part of the rock contracts or shrinks
because theouter pat of the rock
COols faster than the inner portion. The
process of expansion and contraction
are repeated over the years and
produce cracks in the rock causing
the outer surface to break off.ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKSe
Processes of Soil Formation
3. Air also enters the cracks, and
OXygern in the air combines witih some
elements such as iron to prodUce iron
oxide (rust or kalawang) which is brittle
and will easily peel off.
ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKS?
Processes of Soil Formation
4. lIn a sinmilar way, carbon dioxide
firom the air redcts with water to form
an acid causing the rock to soften
further.
ACTVITY 4 HOW ARE SOILS FORMED FROM
ROCKSe
Brecesses a So FOmoion
5.Once sofi and broken bacieria and
Small planis siart to grow. in ihe crockS
of ihe rOck.
ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKS?
Processes of Soi Formation
6. Affer some time, the dead plants
and animals die and decay cauSing
the formation of more acidic
Substances which further breaks the
rocks. The dead bodies of plants and
animals are acted Upon by
microorganism and breakdown into
smaller compounds while the minerals
from the rock return to the soil.
ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKS?
Pocesses of Soil Homation
2. On cooling, at night time, the outer
part of the rock contracts or shrinks
because theouter pat of the rock
COols faster than the inner portion. The
process of expansion and contraction
are repeated over the years and
produce cracks in the rock causing
the outer surface to break off.ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKSe
Processes of Soil Formation
3. Air also enters the cracks, and
OXygern in the air combines witih some
elements such as iron to prodUce iron
oxide (rust or kalawang) which is brittle
and will easily peel off.
ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKS?
Processes of Soil Formation
4. lIn a sinmilar way, carbon dioxide
firom the air redcts with water to form
an acid causing the rock to soften
further.
ACTVITY 4 HOW ARE SOILS FORMED FROM
ROCKSe
Brecesses a So FOmoion
5.Once sofi and broken bacieria and
Small planis siart to grow. in ihe crockS
of ihe rOck.
ACTIVITY 4: HOW ARE SOILS FORMED FROM
ROCKS?
Processes of Soi Formation
6. Affer some time, the dead plants
and animals die and decay cauSing
the formation of more acidic
Substances which further breaks the
rocks. The dead bodies of plants and
animals are acted Upon by
microorganism and breakdown into
smaller compounds while the minerals
from the rock return to the soil.
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Answer:
The process of soil formation from rocks involves several steps. Here is a simplified explanation of the process with a drawing:
Weathering: Weathering is the initial step in soil formation. It involves the breakdown of rocks into smaller particles due to various physical, chemical, and biological processes. Over time, weathering agents such as water, wind, temperature changes, and biological activity act on the rocks.
Mechanical Weathering: Mechanical weathering refers to the physical breakdown of rocks into smaller fragments without changing their composition. One common form of mechanical weathering is frost action or freeze-thaw cycles. When water enters cracks in rocks and freezes, it expands, exerting pressure on the rock and causing it to break apart.
Chemical Weathering: Chemical weathering occurs when rocks are chemically altered or dissolved by substances in the environment. For example, carbon dioxide in the air combines with water to form carbonic acid, which can dissolve certain minerals in rocks. This process weakens the rocks and leads to their breakdown.
Biological Activity: Biological activity, such as the growth of plants and the activities of microorganisms, also plays a role in soil formation. Plant roots can penetrate cracks in rocks, exerting pressure and causing further fragmentation. Microorganisms break down organic matter, such as dead plants and animals, releasing organic acids that contribute to chemical weathering.
Soil Formation: As weathering continues, the fragmented rocks mix with organic matter, minerals, and water to form soil. The process of soil formation involves the accumulation of these components and the development of distinct soil horizons or layers.
The drawing can illustrate the gradual breakdown of rocks into smaller fragments through weathering processes. It can also depict the influence of water, wind, temperature changes, plants, and microorganisms on the rocks, leading to the formation of soil.
Please note that the process of soil formation is complex and can take thousands or even millions of years. The actual soil formation process may involve additional factors and processes depending on the specific geological and environmental conditions.
Explanation: