Natural Resources - One Shot Revision | Class 9 National Science Olympiad (NSO)
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✅ In this video,
✔️ Class: 9th
✔️ Subject: National Science Olympiad (NSO) - Biology
✔️ Chapter: Natural Resources
✔️ Topic Name: Natural Resources - One Shot Revision (Part 2)
✔️ Topics Covered In This Video (By Palak Mam): Explanation of Biogeochemical Cycles, Hydrological or Water Cycle, Carbon Cycle, Global Warming and Greenhouse Effect, Causes of Greenhouse Effect, Nitrogen Cycle, Oxygen Cycle, Ozone Layer and its Depletion
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00:00 Introduction
00:36 Biogeochemical Cycles
11:02 Hydrological or Water Cycle
17:52 Carbon Cycle
02:05 Global Warming and Greenhouse Effect
31:41 Nitrogen Cycle
55:44 Oxygen Cycle
01:01:22 What is an Ozone Layer?
01:04:51 Formation of Ozone
01:06:41 Ozone Layer Depletion
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