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spheres of the earth

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spheres of the earth

  1. 1. THE FOUR MAIN SPHERES OF THE EARTH. 1. THE HYDROSPHERE 2. THE ATMOSPHERE 3. THE LITHOSPHERE 4. THE BIOSPHERE
  2. 2. 1. THE HYDROSPHERE  Hydro means water.  The hydrosphere is made up of water in all form.  Water exists in form of ice, liquid and gas (water vapour).  Ocean/ seawater cover 71% of planet Earth.  97% of the water on Earth is salt water.  Aquatic plants and animals are found in this sphere. For example fish live under water, ushaka marine in Durban shows the variety of live under water.
  3. 3. 2. THE ATMOSPHERE  Atmos means air.  The atmosphere is a blank of air surrounding the earth.  It consists of 21% oxygen, 78% nitrogen and 1% of other gases.  It protects us from the harmful rays of the sun.  Life on earth is supported by this sphere.  This is why we should ensure that we reduce the rate of pollution.
  4. 4. 3.THE LITHOSPHERE  The lithosphere, sometimes called the geosphere is made up of hard rocks and soil.  It is the land in which we live in.  The surface in this sphere is uneven due to the different landforms found in it such as mountains, hills, valleys etc.  includes the Earth's interior, rocks and minerals, landforms and the processes that shape the Earth's surface.
  5. 5. THE BIOSPHERE Bio means life. It includes animals, humans, plants and the microorganisms. Since life exists on the ground, in the air, and in the water, the biosphere overlaps all these spheres. Here complex community of living and non-living things functioning as a single unit. Each sphere depends on the other in order to support life on earth. For example we as humans need the land to live in, water for our basic needs and we also need air .
  6. 6. REFERENCES • Moudud, H. (2016). 2 Spheres of the Earth. Available from Slideshare at https://www.slideshare.net/moududhasan/2-spheres-of- theearth?qid=34de760d-dd6b-4695-bf87- 724255a35f39&v=&b=&from_search=1 (Accessed 15 August 2020). • Mgitterm. (2017). 2 ESS Earth spheres notes. Available from Slideshare at https://www.slideshare.net/mgitterm/2-ess-earth-spheres- notes?qid=4256bde8-67e5-4c21-81e6- d40adaaf7fab&v=&b=&from_search=10 (Accessed 12 August 2020). • Stephan, J D. (2017). Four Spheres. Available from Slideshare at https://www.slideshare.net/StefanJadeNavarro/four- spheres?qid=99b10da5-cf2a-4cd0-b623- 46abacdc8bc5&v=&b=&from_search=11 (Accessed 12 August 2020).
  7. 7. REFERNCE • Laura, R. (2016). Earths spheres. Available from Slideshare at https://www.slideshare.net/LauraRicoBeck/earths-spheres- 66260008?qid=6f4882e3-1ec6-4b98-b2df- f18537233b0a&v=&b=&from_search=14 (Accessed 11 August 2020). • Jr Martinez, G. (2019). Available online from Slideshare at https://www.slideshare.net/JayArGuzman/earth-structure- 154420539?qid=6f4882e3-1ec6-4b98-b2df- f18537233b0a&v=&b=&from_search=36 (Accessed 11 August 2020).

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