Motion of the Earth
By: Manisha
Shrestha
Review
What does the solar system consist of?
1) Sun
2) Planets
3) Asteroids
4) The natural satellites of the planets
5) Comets
6) Interplanetary dust
7) Meteoroids
What is at the center of the solar system?
Sun
Axis
An imaginary line which runs through both
poles of a planet.
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.
Rotation of the Earth
http://www.classzone.com/books/earth_scie
nce/terc/content/visualizations/es0404/es
0404page01.cfm?chapter_no=visualizatio
n
Direction of the Rotation
In which direction does the earth rotate?
Axial Tilt of the Planets and a Dwarf
Planet
Axial Tilt (°)
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto (Dwarf planet)
~0.01
177.36
23.4
25.19
3.13
26.73
97.77
28.32
119.61
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.
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
Period of Revolution
Planets
Period of Revolution Around the Sun
Mercury
87.96 Earth days
Venus
224.68 Earth days
Earth
365.26 days
Mars
686.98 Earth days
Jupiter
11.862 Earth years
Saturn
29.456 Earth years
Uranus
84.07 Earth years
Neptune
164.81 Earth years
Pluto (dwarf planet)
247.7 years
Rotation and Revolution
Worksheet
Rotation
Define
How many days
does each take?
Which one goes
around an axis
or orbit?
Revolution
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://www.kidsgeo.com/geography-for-kids/0019-the-revolution-of-theearth.php
http://en.wikipedia.org/wiki/Axial_tilt
http://www.enchantedlearning.com/subjects/astronomy/planets/