Class 9 Science Chapter 14
Chapter 14: - Natural Resources
14.1 The breath of life: Air
14.1.1 The role of the atmosphere in climate control
14.1.2 The movement of air: Wind
14.1.4 Air pollution
14.2 Water: A wonder liquid
14.2.1 Water pollution
14.3 Minerals riches in the soil
14.4 Biogeochemical cycles
14.4.1 The water-cycle
14.4.2 The nitrogen cycle
14.4.3 The carbon cycle (The greenhouse effect)
14.4.4 The oxygen cycle
14.5 Ozone layer
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