1. Motion of the Earth By: Manisha Shrestha

2. Review What does the solar system consist of? What is at the center of the solar system? Sun 1) Sun 2) Planets 3) Asteroids 4) The natural satellites of the planets 5) Comets 6) Interplanetary dust 7) Meteoroids

3. Axis An imaginary line which runs through both poles of a planet.

4. Rotation of the Earth The Earth is spinning upon a central axis. The Earth's axis is tipped over about 23.5° from the vertical. The Earth rotates around once in 24 hours.

5. Rotation of the Earth http://www.classzone.com/books/earth_scie nce/terc/content/visualizations/es0404/es 0404page01.cfm?chapter_no=visualizatio n

6. Direction of the Rotation In which direction does the earth rotate?

7. Axial Tilt of the Planets and a Dwarf Planet Axial Tilt (°) Mercury~0.01 Venus177.36 Earth23.4 Mars25.19 Jupiter3.13 Saturn26.73 Uranus97.77 Neptune28.32 Pluto (Dwarf planet)119.61

8. Revolution of the Earth The earth revolves around the sun. The orbit is elliptic. The Earth's tilt stays constant. The Earth completes one revolution in 365 days.

9. Revolution of the Earth http://esminfo.prenhall.com/science/geoa nimations/animations/01_EarthSun_E2.html http://esminfo.prenhall.com/science/geoa nimations/animations/01_EarthSun_E2.html

10. Period of Revolution PlanetsPeriod of Revolution Around the Sun Mercury87.96 Earth days Venus224.68 Earth days Earth365.26 days Mars686.98 Earth days Jupiter11.862 Earth years Saturn29.456 Earth years Uranus84.07 Earth years Neptune164.81 Earth years Pluto (dwarf planet)247.7 years

11. Rotation and Revolution Worksheet RotationRevolution Define How many days does each take? Which one goes around an axis or orbit?

12. Resources http://www.wpclipart.com/space/solar_system/solar_system_large.png http://ucsdnews.ucsd.edu/graphics/images/CometWild2_lg.jpg http://www.tqnyc.org/NYC063368/comet.gif http://www.gly.bris.ac.uk/www/teach/virtrips/nineplanets/gif/Asteroid460.gif http://www.chanceandchoice.com/ChanceandChoice/earthinclined.jpg http://www.windows.ucar.edu/tour/link=/the_universe/uts/earth2.html http://www.lakepowell.net/sciencecenter/milankovitch%20cycle%202.gif http://viz.aset.psu.edu/gho/sem_notes/3d_fundamentals/gifs/right_hand_ru le.gif http://viz.aset.psu.edu/gho/sem_notes/3d_fundamentals/gifs/right_hand_ru le.gif http://www.kidsgeo.com/geography-for-kids/0019-the-revolution-of-the- earth.php http://www.kidsgeo.com/geography-for-kids/0019-the-revolution-of-the- earth.php http://en.wikipedia.org/wiki/Axial_tilt http://www.enchantedlearning.com/subjects/astronomy/planets/