CBSE 10 Science · U5
Natural Resources
Syllabus-listed 5-mark theory unit covering ecosystems, environmental problems, ozone depletion, waste production and solutions, and biodegradable versus non-biodegradable substances.
Test yourself
A focused, distraction-free run through 25 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic 5.1
Ecosystems and Their Components
biotic factors, abiotic factors, producers, consumers and decomposers
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Topic 5.2
Food Chains and Energy Flow
trophic levels, energy transfer, food webs and ecosystem balance
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Topic 5.3
Biodegradable and Non-biodegradable Waste
waste properties, segregation, composting, recycling and safe disposal
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Topic 5.4
Environmental Problems and Biomagnification
persistent pollutants, food-chain accumulation and local environmental decisions
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Topic 5.5
Ozone Depletion and Waste Solutions
ozone layer, CFCs, ultraviolet radiation and sustainable choices
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