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Natural Resouces-II (9th Grade Biology)

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9th Grade biology At the end of this lesson, you will be able to: • Find out mineral riches in the soil. • Understand the types of soil. • Find out what is soil pollution. • Understand the biogeochemical cycles. • Study the water-cycle. • Understand the nitrogen-cycle. • Study carbon-cycle. • Understand the greenhouse effect. • Study the oxygen-cycle. • Understand the importance of ozone layer.


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