Biosphere is part of the earth where we exist. It consists of a highly integrated and interacting zone comprised of atmosphere, hydrosphere and lithosphere.

Biosphsre is absent in extremes of the north and south poles, highest mountains and deepest oceans. As it is hostile conditions that do not support life.

The biosphere is the region of Earth where life exists. It includes the land, water, and air, and extends from the highest mountaintops to the deepest ocean trenches. The biosphere is a thin layer compared to the Earth’s total size, but it is home to an incredibly diverse range of organisms.

The biosphere is made up of many different ecosystems, each with its own unique set of plants and animals. Ecosystems can be as small as a pond or as large as a rainforest. They can be found in all parts of the world, from the frigid Arctic to the scorching deserts.

The biosphere is a complex and interconnected system. All of the different ecosystems are linked together by the movement of energy and matter. The sun provides the energy that drives the biosphere, and this energy is passed from one organism to another through the food chain. Matter is also recycled through the biosphere, as organisms take in nutrients and release waste products.

The biosphere is essential for life on Earth. It provides the air we breathe, the water we drink, and the food we eat. It also helps to regulate the Earth’s climate. The biosphere is a fragile system, and it is important that we protect it.

Here are some of the threats to the biosphere:

  • Climate change: Climate change is causing the Earth’s temperature to rise, which is having a negative impact on many ecosystems. For example, rising temperatures are causing glaciers to melt, which is threatening the habitats of many plant and animal species.
  • Pollution: Pollution is another major threat to the biosphere. Air pollution, water pollution, and land pollution are all harming ecosystems around the world.
  • Overpopulation: Overpopulation is putting a strain on the biosphere. As the human population grows, we are demanding more resources from the Earth, which is putting a strain on ecosystems.
* * All the Notes in this blog, are referred from Tamil Nadu State Board Books and Samacheer Kalvi Books. Kindly check with the original Tamil Nadu state board books and Ncert Books.