CBSE Class 9
Free courses
Science
Our Environment
Lesson 4 of 5 • 7 upvotes • 14:00mins
Biogeochemical Cycles in detail Water cycle Nitrogen Cycle
5 lessons • 1h 13m
Introduction + Resources on Earth (in Hindi)
15:00mins
Air Pollution + Water as Resource + Water Pollution (in Hindi)
Mineral Riches in the Soil (in Hindi)
Biogeochemical Cycle (in Hindi)
14:00mins
Biogeochemical Cycles Part 2 Carbon and Oxygen Cycle (in Hindi)
14:56mins