Week2_Motion_of_Earth.pptx, all about motion of earth

this is pptx about motion of earth

1. ____ _____ ____ ____ ____ ____ ___ ___ ___ ___ ___ ___ ___

2. Rotation & Revolution

3. Rotation is the movement of the earth on its axis. Days and Nights take place because of rotation. So, the days and nights that you see are actually because of this rotation of the earth around its own axis.

4. The axis of the earth, which is an imaginary line, has axis tilted at an angle of 66.5 ° with its orbital plane. The circle that divides the day from night on the globe is called the circle of illumination.

5. An axis is the imaginary line about which body of Earth rotates.

6. Revolution is the second type of motion of the earth. It is the movement of the earth around the Sun in a fixed path or orbit. Revolution causes the change of seasons

7. It takes 365days and 6hours (one year) to revolve around the sun. It is important to note that we consider a year as consisting of 365days only and ignore six hours for the sake of convenience.

8. O rbit , in astronomy, path of a body revolving around an attracting centre of mass, as a planet around the Sun or a satellite around a planet

9. Six hours saved every year are likely to make one day (24hours) over a span of four years. We add this surplus day to the month of February. Every fourth year, February is 29 days instead of 28 days. This year with 366 days is called a leap year.

10. The earth goes around the sun in an elliptical orbit. The nights are longer than the days of the winter season. This position of the earth is called the summer solstice.

11. On 21st March and 23rd September, direct rays of the sun fall directly on the equator. During this period, the whole earth experiences equal days and equal nights. This is called an equinox.

12. As Earth rotate around the sun, a flow energy is received through Solar Radiation.

13. 1. Biologically , only photosynthetic organisms are capable of harnessing and converting radiant energy into chemical energy through the process of photosynthesis. This chemical energy is transferred from one trophic level to the next.

14. 2. Physiologically , all organisms respond to stimulus. Each organism is equipped with a unique structure, such as the human skin, that responds the sunlight. Melanin is a brown to black pigment occurring in the hair, skin, and the iris of the eyes in animals. When produced melanin serves as protection.

15. 3. Meteorologically , Earth’s weather and climate is driven by the solar radiation. Heating of the planet as a result of rotation affects the different biogeochemical cycles such as the hydrologic cycle. The water vapor in the atmosphere causes moisture and cloud to form and precipitation to happen.

16. SYSTEM OF THE EARTH

17. The Geosphere The geosphere includes the rocks and minerals on Earth – from the molten rock and heavy metals in the deep interior of the planet to the sand on beaches and peaks of mountains. The geosphere also includes the abiotic (non-living) parts of soils and the skeletons of animals that may become fossilized over geologic time.

18. Beyond these parts, the geosphere is about processes. The processes of the rock cycle such as metamorphism, melting and solidification, weathering, erosion, deposition, and burial are responsible for the constant recycling of rocks on Earth between sedimentary, igneous, and metamorphic states

19. Sedimentary rocks  are formed via weathering and transport of existing rocks, and then deposition, cementation, and compaction into sedimentary rock.

20. Igneous rocks  are formed by the cooling and crystallization of molten rock. Intrusive & Extrusive

21. Metamorphic rocks  are formed when heat or pressure is applied to other rocks.

22. BIOSPHERE , The biosphere is a global  ecosystem  composed of living  organisms  (biota) and the abiotic (nonliving) factors from which they  derive   energy  and  nutrients .

23. HYDROSPHERE

24. D iscontinuous layer of  water  at or near Earth’s surface. It includes all liquid and frozen surface waters,  groundwater  held in  soil  and  rock , and atmospheric water vapour .

25. The   LITHOSPHERE   is the solid, outer part of Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth’s structure.

26. Cyosphere The cryosphere contains the frozen parts of the planet. It includes snow and ice on land, ice caps, glaciers, permafrost, and sea ice.

27. D iscontinuous layer of  water  at or near Earth’s surface. It includes all liquid and frozen surface waters,  groundwater  held in  soil  and  rock , and atmospheric water vapour .

28. ATMOSPHERE , the  gas  and  aerosol  envelope that extends from the  ocean , land, and  ice -covered surface of a  planet  outward into  space