HYDROPHERE
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CHARACTERISTIC OF HYDROSPHERE
- The hydrosphere is the liquid portion of the earth
- It covers about 70% of the earth crust
- It holds water in various forms solid such as ice liquid like water and gases e.g water vapour
- It includes all forms of fresh water like lakes, river, water vapour.
- It also includes ocean water which is salty
- ocean water accounts for about 97% of the hydrosphere
IMPORTANCE OF HYDROSPHERE TO MAN
- Hydrosphere provides water for domestic uses such as washing drinking and cooking.
- It provides a medium of transportation.
- It provides water industrial uses
- It provides food in form of fish, prawns to man.
- It provides employment
- It can also be used to generate electricity such as hydroelectric power.
- It is used in agriculture in forms of rain or irrigation
- It also serves as tourist centre such river and beaches.
ATMOSPHERE
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CHARACTERISTIC OF ATMOSPHERE
- The atmosphere is the gaseous portion of the earth
- It is a layer of gases surrounding the earth.
- over 99% lies within 30km of the earth surface
- Its density decrease progressively with elevation
- It contains water in form of vapour in lower layers
- weather phenomenon cloud, rain and snow are largely confined in the atmosphere.
IMPORTANCE OF ATMOSPHERE TO MAN
- The atmosphere is the habitat of some living organism
- It provides oxygen for animals and plant for respiration
- It provides oxygen for combustion or burning
- It provides carbon dioxide for photosynthesis by plant
- It provides nitrogen for plant
- It acts a greenhouse
- Atmosphere is a medium of communication such as air4route.
BIOSPHERE
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CHARACTERISTIC OF BIOSPHERE
- The biosphere is the zone of the earth occu[ied by living organisms.
- It is a layer of life which exist on the earth surface and the lithosphere
- It is a narrow zone where complex biological and chemical activities occur
- It includes an organism like plant and animal with micro organisms.
IMPORTANCE OF BIOSPHERE TO MAN
- Plant in the biosphere provide food for man
- It provides a source of energy like fire wood for man
- plant also provide clothing materials like cotton and wool for man.
- Activities within the biosphere provides employment for man.