Let's solve each part of the worksheet
"Soil Erosion and Conservation" step by step, with explanations.
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1. Fill in the blanks
a. Cutting down of trees on large scale is called _______.
✔ Deforestation
👉 *Explanation:* When trees are cut down on a large scale, especially in forests, it's known as deforestation. This can lead to soil erosion because tree roots no longer hold the soil together.
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b. _______ is the organic matter made of dead plants and animals.
✔ Humus
👉 *Explanation:* Humus is dark, nutrient-rich material formed from decomposed plant and animal remains. It improves soil fertility and structure.
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c. By growing _______ or _______ is the most effective method to prevent soil from erosion.
✔ Trees / Grass (or
Crops / Vegetation)
👉 *Explanation:* Planting trees, grass, or crops helps bind the soil with their roots and reduces erosion caused by wind and water.
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d. The breaking of rocks into smaller pieces is called _______.
✔ Weathering
👉 *Explanation:* Weathering is the process where rocks break down into smaller fragments due to temperature changes, water, ice, or biological activity — but without moving the rock.
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2. Tick (√) the correct word
a. Soil that contains humus is called (topsoil / loam).
✔ Topsoil
👉 *Explanation:* Topsoil is the uppermost layer of soil rich in organic matter (humus), which supports plant growth. Loam is a type of soil with balanced sand, silt, and clay, but not necessarily defined by humus alone.
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b. It takes about 200 to 400 years for the formation of just 1 cm of (rock / soil).
✔ Soil
👉 *Explanation:* Soil forms very slowly over time through weathering and decomposition. It can take hundreds of years to form just 1 cm of fertile soil.
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c. Farming on slopes is called (step farming / ladder farming).
✔ Step farming
👉 *Explanation:* Step farming is also known as terrace farming. Farmers build terraces (steps) on hillsides to reduce runoff and prevent soil erosion. "Ladder farming" is not a standard term.
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3. Define
a. Soil erosion
👉 *Soil erosion is the process by which topsoil is removed from the land surface by natural forces like water, wind, or ice.*
👉 It leads to loss of fertile soil and reduced agricultural productivity.
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b. Conservation
👉 *Conservation means protecting and managing natural resources like soil, water, and forests so they are not wasted or destroyed.*
👉 In soil conservation, we use methods to prevent erosion and maintain soil health.
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c. Weathering
👉 *Weathering is the breakdown of rocks into smaller pieces by physical, chemical, or biological processes without moving them.*
👉 For example, freezing water expands in cracks and breaks rocks apart (physical weathering).
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4. Answer the following in one or two sentences
a. Name the agents of soil erosion.
👉 The main agents of soil erosion are
water, wind, ice, and gravity. Water (rain and rivers) and wind are the most common causes.
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b. What are afforestation?
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Afforestation is the process of planting trees in areas that previously had no forest cover. It helps in preventing soil erosion, improving air quality, and increasing biodiversity.
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✔ Final Answers Summary:
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1. Fill in the blanks:
a. Deforestation
b. Humus
c. Trees / Grass (or crops / vegetation)
d. Weathering
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2. Tick the correct word:
a. Topsoil
b. Soil
c. Step farming
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3. Definitions:
a. Soil erosion – Removal of topsoil by natural forces like water and wind.
b. Conservation – Protecting natural resources for future use.
c. Weathering – Breaking down of rocks into smaller pieces without movement.
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4. Short answers:
a. Agents of soil erosion: Water, wind, ice, and gravity.
b. Afforestation: Planting trees in areas without forests to restore ecosystems.
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This worksheet teaches important environmental concepts related to soil health and sustainability! 🌱🌍
Parent Tip: Review the logic above to help your child master the concept of soil conservation worksheet.
