evidence of the earth’s rotation
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Astronomy Project By: Alix Joy. Evidence of the Earth’s Rotation. Four Objects That Show Evidence of Earth’s Rotation. Pendulums. Stars. Winds. Waters. The Pendulum. - PowerPoint PPT PresentationTRANSCRIPT
Evidence of the Earth’s
Rotation
Astronomy Project By: Alix Joy
Four Objects That Show
Evidence of Earth’s Rotation
Pendulums
Stars
Winds
Waters
Pendulum: a weighted object suspended from a fixed point so it has the ability to swing freely to and fro under the action of gravity and commonly used to regulate movements (such as
that of clockwork)
From www.Webster.com
Foucault, a former French physicist, preformed a demonstration of the
pendulum. This demonstration later gave proof to the fact that the
earth rotates…
Jean Bernard Léon Foucault
FOUCAULT ’S DEMONSRTATION Foucault’s demonstration revealed an
accurate set of data of earth’s rotation. To demonstrate his pendulum theory, Foucault used a steel ball with a pin mounted on its base. This steel shape weighed a total of
62 lbs. This pendulum was hung from the dome of the Pantheon in Paris from a
220 ft. piano wire.
http://www.calacademy.org/products/pendulum/page7.htm
FOUCAULT ’S DEMONSRTATION
On the floor beneath the pendulum, a pit of sand had been placed. This pit of sand was to be marked by the pin of the pendulum’s base, presenting the
path at which the pendulum had swung.
http://www.calacademy.org/products/pendulum/page7.htm
The Sun and The Stars…
The sun appears to move across the sky each and every day and at night the stars
also seem to do the same…
But knowing that the sun and stars don’t move gives evidence that the earth has to be moving.
This would establish why we have night and day but it also shows that the earth does rotate.
http://www.onr.navy.mil/focus/spacesciences/observingsky/motion1.htm
As many people observe, the stars that we see each month seem to change or be in
slightly different places. However, the stars we see each month are all different and this
is because of the fact that the earth revolves around the sun…
After a few days, the earth moves further along it’s orbiting path. Therefore, the stars
that were visible in the previous days or even months are now behind the earth and
the sun now remains in the way.
http://www.classzone.com/books/earth_science/terc/content/visualizations/es0408/es0408page01.cfm?
The Ocean Waters…
The ocean moves because of the gravitational pull of the
earth’s rotation. As a result of the pull, the water has tidal
currents and waves…
What Would Happen If The Earth Suddenly
Stopped???
• All rockets and airplanes would fly in a straight path exactly where they are supposed to go
without the deflection of wind which causes an aircraft to fly in an arc in order to get from
point A to point B…
If Earth Stopped Rotating WE WOULD NOT HAVE SUCH STORMS AS
• CYCLONES •HURRICANES
•TYPHOONS •TORNADOES
AND…
IT WOULD ALWAYS RAIN IN THE SAME
AREAS…
• Beynon, Zinaida. "http://www.calacademy.org/products/pendulum/page5.htm." Calacademy. 1999. California Academy of Sciences. May 2006 <http://www.calacademy.org/products/pendulum/index.html>.
• Beynon, Zinaida. "http://www.calacademy.org/products/pendulum/page7.htm." Calacademy. 1999. California Academy of Sciences. May 2006 <http://www.calacademy.org/products/pendulum/index.html>.
• Beynon, Zinaida. "http://www.calacademy.org/products/pendulum/page9.htm." Calacademy. 1999. California Academy of Sciences. May 2006 <http://www.calacademy.org/products/pendulum/index.html>.
• Beynon, Zinaida. "http://www.calacademy.org/products/pendulum/page12.htm." Calacademy. 1999. California Academy of Sciences. May 2006 <http://www.calacademy.org/products/pendulum/index.html>.
• "http://www.onr.navy.mil/focus/spacesciences/observingsky/motion1.htm." May 2006. • "http://www.webster.com/dictionary/pendulum." Webster. 2006. Merriam-Webster, Inc. May
2006 <http://www.webster.com/>. • Loomis, Jennifer.
"http://www.classzone.com/books/earth_science/terc/content/visualizations/es0408/es0408page01.cfm?" Classzone. McDougal Littell. May 2006 <http://www.classzone.com>.
• Spaulding, Nancy E., and Samuel N. Namowitz. Heath Earth Science. Boston: D.C. Heath and Company, 1994. 457-469.
• Tiner, John H. 100 Scientists Who Changed the World. 1st ed. Milwaukee: World Almanac Library, 2003. 54.