Chapter 24: Web of Life
जीवन का जाल (पारिस्थितिक अंतर्संबंध, खाद्य जाल एवं पर्यावरण संरक्षण)
Don't Let a 20-Minute Bubbling Delay Cost You CTET Qualification
In offline CTET exams, bubbling 150 bubbles takes 18 to 22 minutes of mechanical time. A single misaligned row can trigger an 8-question domino error. Practice bubble-filling this chapter's solved MCQs inside Mentora's official OMR simulator.
- Ecosystem Interdependence: All living organisms (plants, animals, birds, humans) and abiotic elements (sunlight, air, water, soil) are linked in a delicate mutual web of life (*जीवन का जाल*).
- Constructivist Concept Mapping: Children draw pictures of themselves, birds, snakes, mice, trees, water, and sunlight, then connect them with colored threads to visualize food webs and ecological dependencies.
- The Ecological Role of Predators: Snakes eat rats that destroy farmer grain; if snakes are eliminated, rodent explosions destroy crops; birds eat caterpillars that defoliate trees.
- Trap: What is the pedagogical purpose of the 'Web of Life' activity? Correct: **To help children understand that humans are not isolated, but intimately dependent on biotic and abiotic components of nature**.
NCERT Core Facts: Ecological Webs, Interdependence & Holistic Education
NCERT Class 3 Chapter 24 serves as the grand synthesizing capstone of the Class 3 EVS curriculum.
1. Visualizing the Ecological Web (जीवन का जाल)
- In this constructivist activity:
- a.A student places their own drawing in the center.
- b.Surrounding cards show: Sun, Grass, Snake, Rat, Cow, Soil, Water, Air, Bird.
- c.Wool threads connect items:
- Human -> Cow (Milk)
- Cow -> Grass (Food)
- Grass -> Sun + Soil + Water (Photosynthesis)
- Rat -> Grain
- Snake -> Rat
- Bird -> Insects
- When threads are pulled, children immediately perceive: "Everything is tied to everything else."
2. Why Every Species Matters
- Sun: Ultimate source of light and energy driving the biosphere.
- Soil & Water: Fundamental matrices anchoring plants.
- Snakes (Farmer's Friends): Keep agricultural rat populations under control.
- Lesson for CTET Aspirants: Environmental Studies in primary school is not rote biology; it is the inculcation of deep ecological empathy.
Test Your Mastery: Web of Life
Authentic CBSE exam questions tested directly from this NCERT chapter.
In the concluding chapter 'Web of Life' of NCERT Class 3 EVS, children use lines or threads to connect plants, animals, soil, water, and sunlight. What is the fundamental aim of this interactive exercise?
एनसीईआरटी कक्षा 3 के अंतिम अध्याय 'जीवन का जाल' में बच्चे धागों से पौधों, जानवरों, मिट्टी, पानी और धूप को जोड़ते हैं। इस अभ्यास का मूल उद्देश्य क्या है?
In the ecological web of life, why are snakes considered an indispensable friend of agricultural farmers?
पारिस्थितिक जीवन के जाल में साँपों को किसानों का अभिन्न मित्र क्यों माना जाता है?
What is the ultimate source of energy for the web of life in NCERT Class 3?
The Sun.
Why are snakes described as friends of farmers in the ecological web?
Because snakes eat rats in crop fields, preventing destruction of food grains.