1. The Earth and its living World
Where do you get water from?

2. On the surface of the earth, there is some land and water
Spheres of the Earth
Lithosphere - Land
Hydrosphere - Water
Atmosphere - Air constituents
Biosphere - Living things.

3. Lithosphere Earth's crust is hard rock and soil
Lanol - grassy;sand,crops,forests
1/3 part of lithosphere- Land

4. Continent
Large or Vast continuous stretch of Land.
Divided into seven continents Africa, Asia, Europe, North America, South America Australia, Antarctica

5. Land is not even in all places Give rise to different shapes
Land forms
Land is not even in all places
Give rise to different shapes
eg. Plain, Hill, Mountain

6. Hydrosphere 2/3 part of earth covered with water.
Water part is divided into : Ocean- salty water, Surface water and fresh water

7. Oceans
Salty water - five oceans Atlantic, Pacific, Arctic, South Ocean, Indian Ocean.
Land along margins of ocean called coastal region
Water bodies of different shapes and sizes.- sea, bay, strait, Gulf etc.

8. Rivers Fresh water reservoirs streams of water flowing over the land
Streams are - Rills, Brook, Rivers
Rills, brooks, streams - join to form rivers
Rivers join to make bigger river tributaries
Rivers cascade down a sudden drop - water fall
Rivers flow to the ocean.

9. Lakes
Water collected in a low lying area of land - Lakes
eg. Manas sarowar

10. Ice form of water, Glacier
water particles in the clouds freeze in cold regions
come down in the form of snow
Layer of snow pile up on ground to form ice.
In low - lying area ice pile become huge mass slips down; a slope - glacier
Blocks of ice floting in sea- Iceberg

11. Groundwater- (Well)
water stored in underground layer
well, bore wells, under ground springs
Hydro Sphere :water on earth is surface, Ground water, Water vapours

12. Atmosphere Air around Earth Higher from the surface air becomes rarer.
Consists- mixture of gases, nitrogen, oxygen, water vapour, carbon dioxide
Layers of Atmosphere
Troposphere, Stratosphere, Mesosphere
Ionosphere, Exosphere

13. Troposphere 13 km from earth's surface conditions changes continuously
Go higher in troposphere air becomes cooler
Weather related phenomena rain, fog, clouds, Winds, Storms.
Aeroplanes fly in higher parts (mountaineers)

14. Stratosphere Beyond troposphere about 50 km Ozone gas layer
Ozon layer absorbs ultra violet rays.

15. How does it rain

16. Water evaporates due to sun's heat
Water vapour lighter than air,
Goes higer,cools,condenses- Fine drop lets of water
Droplets forms clouds.
Smaller droplets Bigger drop can not float
Fall down on the earth- Rain

17. Water Cycle
Rain water flows into rills, streams, rivers and finally into sea
Evaporation of this water
Condensation, rainfall continuously processes are done

18. Biosphere Variety of living things in different regions.
Snowbound polar-bear , Africa –Zebras, Australia- Kangaroos, Hot climate- Elephants, Lions.
Living things exist in litho, hydro, atmo
Living world- biosphere

19. Plants, animals, microbes are dependent on one another
Biosphere is where living things take birth, live and die

20. Three Layer of Earth
Earth is surface occupied by land 1/3 and water 2/3
Litho - soil, rock
Hydro - Salty, fresh water reservoir
Atom –Tropo, strato
Bio - All living things