Chapter Mock Test
Total Marks:40
Duration:50 min
Total Questions:20
Difficulty:Mixed
Test Structure
- —Section A: 10 MCQs (1 mark each)
- —Section B: 6 Short Answer (3 marks each)
- —Section C: 2 Long Answer (5 marks each)
Preparation Tips
- • Know ecosystem definition: Biotic (living) + Abiotic (non-living) components
- • Understand food chains vs food webs: Linear vs interconnected feeding relationships
- • Master 10% law: Only ~10% energy transfers between trophic levels; ~90% lost as heat
- • Learn ecological pyramids: Numbers (organism count), Biomass (mass), Energy (always pyramid-shaped)
- • Memorize nutrient cycles: Carbon (photosynthesis → respiration → combustion), Nitrogen (fixation → assimilation → denitrification), Water (evaporation → condensation → precipitation)
- • Understand biodiversity importance: Stability, productivity, human benefits, ecosystem services
- • Know threats: Habitat destruction, poaching, pollution, climate change, invasive species
- • Learn conservation: Protected areas, legal protection, breeding programs, habitat restoration, sustainable practices
- • Understand environmental issues: Pollution (air, water, soil), deforestation, climate change (greenhouse effect)
- • Know sustainable solutions: Renewable energy, 3Rs (reduce/reuse/recycle), sustainable agriculture, international cooperation
Key Topics Checklist
Ecosystem components (biotic/abiotic)
Food chain vs food web difference
Trophic levels (producers/consumers)
10% Law energy transfer
Pyramid of numbers, biomass, energy
Carbon cycle process
Nitrogen cycle and fixation
Water cycle stages
Biodiversity types and importance
Endangered species and extinction