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18CH2001 – Environmental Studies UNIT 1.pptx
- 1. Environment Environment is a combination of various physical and biological elements that affect the life of an organism
- 2. Environment • The term environment was introduced in ecology by the biologist Jacob Van Uerkul (1864-1944) • Environment is derived from the French word Environner = encircle or surround. • It all started from evolution of this plannet
- 4. Evolution - Matter • Big-bang theory - explain the way the universe began from a single point • Has a mass and occupies space • Smallest particle or smallest unit • Random motion – Kinetic energy • Cohesion - Intermolecular force of attraction • Solid , Liquid and Gas – state • See touch , smell and feel
- 5. Creation of Matter Matter Living Non Living Plant Animal Natural Artificial (man made)
- 6. Non Living Natural Pure substances Elements Metals, Non Metals, Metalloids, Nobal Gases Compounds Two or more Elements
- 7. Components of the Matter • Biotic : are derived from animals and plants (living world). • Abiotic : are derived from the non-living world e.g. land, water, and air. Mineral and power resources are also abiotic resources some are derived from nature. • The interactions between the abiotic aspects of nature and specific living organisms together form ecosystems of various types
- 8. Living-Biotic • Plants • Animals -species
- 13. The Abiotic components of Environment • Abiotic components are non-living chemical and physical factors in the environment. • Abiotic phenomena underlie all of biology. • Abiotic factors, while generally downplayed, can have enormous impact on evolution. • Abiotic components are aspects of geodiversity. • They can also be recognised as "abiotic pathogens“ • E.g- Temperature, light, sun light, pH, soil components, etc.
- 14. Animals
- 15. Birds
- 16. Reptiles
- 17. Marine life
- 21. Ecological Benefits of forest • Production of Oxygen • Reduction of carbon dioxide • Wild life shelter • Regulation of Hydrological cycle • Soil erosion • Pollution moderators
- 25. Hydrosphere - Earth surface It includes the surface water and its surrounding interface • Water is the most abundant substance on the Earth’s surface. • The oceans cover approximately 71% water of the planet, glaciers and ice caps cover additional areas. • Water is also found in lakes and streams, in soils and underground reservoirs, in the atmosphere, and in the bodies of all living organism. • Thus, water in all its forms- ice, liquid, water and water vapor- is very familiar to us.
- 28. Scope of environmental study
- 29. Look around us
- 30. Thank you