Скачать или смотреть Our Environment Class 10 Science (Part 2) | Energy Flow, Biological Mag., Ozone Layer | CBSE Boards

Welcome back, students! In Our Environment Part 2 (Class 10 Science), we continue the CBSE/NCERT chapter “Our Environment” and cover the most exam-scoring concepts like Energy Flow in Food Chain, 10% Law, Biological Magnification, Ozone Layer & its Depletion, and finally Waste / Garbage Management with real-life examples.

This lecture is perfect for Class 10 CBSE Board Exam 2026, NCERT revision, and MCQ + case-based question preparation.

Full Science course -    • Class 10 Board Science | Full course  

What This Video Covers (Board-Focused)
Quick recap of Part 1 (Environment, Ecosystem, Food chain/web)
Energy Flow in Food Chain (Unidirectional flow + energy loss)
10% Law (Lindeman’s Law) with numerical example (1000J → 100J → 10J → 1J)
Why food chains usually have only 3–4 trophic levels
Biological Magnification (Biomagnification)
Ozone Layer
UNEP Agreement (1987) to reduce CFCs and ozone depletion control
Waste / Garbage Management

Exam Relevance (CBSE/NCERT)
This video is extremely important for:
CBSE Class 10 Board Science
NCERT definitions + diagram-based questions
MCQs, Assertion-Reason, Case-based questions
Last-minute revision of high-weightage environment topics

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