Motions of earth.link
- 2. The EARTH IS UNIQUE Earth has life. Earth is called as blue planet Its called as because three parts of the earth is filled with water. Water is the essential thing for the living things to survive
- 3. Earth has atmosphere Earth is surrounded by atmosphere Air that we breathe is from the atmosphere Atmosphere blocks harmful rays from sun Beyond atmosphere there is no air So because of water and atmosphere living things are surviving on earth.
- 4. The distance from sun The nearest heavenly body to the Earth is moon. The sun is very far away from earth but it gives right amount of light and heat. So that the plants , animals and people can live here
- 5. The shape of the earth Shape of the earth is sphere anyone travelled to the edge of the earth they would fall off many years ago people used to think that the earth flat and that if Earth is spherical slightly flat at the top and bottom.
- 6. Solar system Consists of sun and eight planets Sun is at the center of the solar system The third planet is earth Earth is unique from other planets Because life exists on earth.
- 7. Rotation Rotation of earth is nothing but earth spins around on its axis Axis passes through the centre of the earth It’s an imaginary line Its not real The line of axis passes through north pole to the south pole The top point of the earth is called as north pole and the end point is called as south pole.
- 8. What happens when the earth rotates When the earth rotates day and night happens The portion which is exposed to the sun is called a day The portion which away from the sunlight is night The rotation of the earth us continues so the pattern of day and night continues. Earth takes 24 hours to complete one rotation. Day consists of 12 hours and the night consists of 12hours.
- 10. Possible Preconceptions/Misconceptions: ● The earth is larger than the sun. ● The sun disappears at night. ● Day and night are caused by the sun moving from east to west across the sky. ● The amount of daylight increases each day throughout the summer.
- 11. Recap of the Rotation The earth rotates on its on axis The axis is tilted by 231/2degrees When the earth rotates day and night happens The portion which is exposed to the sun is called a day The portion which away from the sunlight is night The rotation of the earth us continues so the pattern of day and night continues. Earth takes 24 hours to complete one rotation. Day consists of 12 hours and the night consists of 12hours.
- 12. New words learnt rotation- a circular movement of an object around a center or axis ● axis- the line about which a rotating body, such as the earth, turns ● hemisphere- half of a sphere such as the earth ● patterns- the regular and repeated way in which something happens or is done ● constant- an event that happens all the time or very often over a period of time orbit- (noun) a path of an object as it circles around another object in outer space ● solar day- one complete rotation of the earth resulting in day and night, a period of 24 hours ● circumference- the complete distance around a circle ● counter clockwise- in the opposite direction of the movement of the hands of a clock
- 13. Interesting facts How much time do planets take to complete one rotation? Mercury 58 days 16 hours Venus 243 days 14 minutes Earth 24 hours Moon 27 days 8 hours Mars 24 hours 17 mins Jupiter 9 hours 55 minutes Saturn 10 hours 40 minutes Uranus 17 hours and 14 minutes Neptune 16 hours 7 minutes Pluto 6 days 9 hours The rotation of the earth results in many weather patterns.The lit side of the planet warms as the dark side cools causing movement of the atmosphere. The circumference of the earth is over 24,000 miles (24,901) and the earth is rotating at just over 1,000 miles per hour. The speed of rotation at the equator is 1,037 miles per hour.
- 14. The earth spins on its axis and also revolves on the orbit around the sun This movement is called revolution Its takes 365 days and 6 hours to complete one revolution . The earth’s axis is not straight and it is tilted by 23 and half degrees The horizontal line which is passing from the middle of the earth will divide earth into halves and also called hemispheres The path of the Earth moving around the Sun is called an orbit. The Earth’s orbit is elliptical.
- 15. How to calculate leap year? In the Gregorian calendar, a normal year consists of 365 days. The time required for the Earth to revolve once about the Sun is actually 365.6 hours, a "leap year" of 366 days is used once every four years. Any year that is evenly divisible by 4 is a leap year: for example, 1988, 1992, and 1996 are leap years.
- 16. How much time do planets take to complete one revolution? Planet Mean distance from the Sun in millions of kms Period of Revolution Mercury 57.9 88 days Venus 108.2 224.7 days Earth 149.6 365.2 days Mars 227.9 687 days Jupiter 778.3 11.86 years Saturn 1,427 29.46 years Uranus 2,870 84 years Neptune 4,497 165 years
- 17. How seasons happen? The tilt causes one part of the earth to lean towards the sun while other part of it is leaning away from the sun Means different part of the earth receives different amount of sunlight and heat. Earth travels around the sun creates a pattern through out the year Thus pattern happens over and over again
- 18. At certain times of the year the northern hemisphere is tilted towards the sun and at times it is southern hemisphere The hemisphere that is exposed to the sun experience summer and the other hemisphere experience winter. In between the summer and the winter there will be spring and autumn. In summer season the days will be long and in the winters the night will be long. So this revolution causes seasons on earth.
- 19. How the seasons happen
- 20. What happens to Earth in June
- 21. What happens to Earth in December
- 22. REVIEW • Earthis constantlyrotating andrevolving. • Earth’stilt andrevolution aroundthesuncausetheseasons. (revolution=togoaroundsomething) Earth’srotation onits axiscausesdayandnight. (rotation =tospin)
- 23. REVIEW • It takesEarth24hours,or1day,tomakeacompleterotation on its axis. • It takesEarth365days,or1year,tomakeacomplete revolution aroundthe sun.