Plants absorb atmospheric carbon dioxide through photosynthesis. Carbon returns to the air through plant and animal respiration, microbial decomposition of organic remains and the combustion of biomass and fossil fuels. Class 9 Science Exploration New Book All Chapter Solution Revise, Reflect, Refine ...
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Deforestation reduces photosynthetic oxygen production while diminishing major terrestrial carbon sinks, elevating atmospheric carbon dioxide. It further accelerates severe topsoil erosion, decreases transpiration rainfall and destroys wildlife biodiversity. Chapter 13 Earth as a System: Energy, Matter and Life Solutions Class 9 Science ...
The cycle includes nitrogen fixation, nitrification, assimilation, ammonification and denitrification. Without cycling, atmospheric nitrogen would remain unassimilated, halting plant protein synthesis and causing famine and complete biosphere collapse. CBSE Class 9 Science Chapter 13 Earth as a System: Energy, Matter and ...
The troposphere hosts weather phenomena. It is heated from below by the Earth’s surface, creating vertical temperature drops and strong convection currents that cause warm air to rise, condense and generate storms. Class 9 Science Chapter 13 Earth as a System: ...
Uneven diurnal heating drives these breezes: daytime slope heating draws warm air up as valley breezes, whereas rapid nighttime cooling sends dense air down as mountain breezes. Barren rock slopes generate colder night breezes. Class 9 Science Exploration Chapter 13 Important ...