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Syllabus
Soil Pollution — Syllabus
Telangana Board · Class 9 · Biology
What Soil Pollution covers in Telangana Board Class 9 Biology: 4 topics, for the 2026-27 session. Part of the Telangana Board Class 9 Biology syllabus.
45 questions20 flashcards5 concepts
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4 Topics · Telangana Board Class 9 Biology · 2026-27
Topics in Soil Pollution
1
Soil Composition and Properties
- Soil is composed of 45% minerals, 25% air, 25% water, and 5% organic matter
- Organic matter consists of 80% humus, 10% roots, and 10% organisms
- Soil formation takes 100 to 10,000 years to create one inch of topsoil
2
Types of Waste and Soil Pollution
- Biodegradable wastes: vegetable peels, paper, wood - decompose naturally
- Non-biodegradable wastes: plastics, glass, metals - do not decompose easily
- Soil pollution is addition of substances that adversely affect soil quality or fertility
3
Causes of Soil Pollution
- Indiscriminate use of fertilizers: NPK fertilizers contain toxic metals like As, Pb, Cd
- Excessive pesticide use: DDT, BHC, organophosphates persist in soil
- Industrial waste dumping: heavy metals, chemicals contaminate soil
4
Effects of Soil Pollution
- Reduced soil fertility and crop yield
- Contamination of food chain and water sources
- Health problems: cancer, birth defects, nervous system disorders
Key Concepts
Soil is composed of 45% mineralsSoil has three types of propertiesBiodegradable wastes (vegetable peelsExcessive use of chemical fertilizers (NPK)The process where toxic chemicals like
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What are the important topics in Soil Pollution for Telangana Board Class 9 Biology?
Key topics in Soil Pollution include Soil Composition and Properties, Types of Waste and Soil Pollution, Causes of Soil Pollution, Effects of Soil Pollution. Study these first, then practise questions on each for Class 9 exams.
How should I revise Soil Pollution for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Soil Pollution. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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