The Moon Earth’s Buddy
What is a Moon? • A Moon is a natural satellite that revolves around a planet.
How does the Moon move? • Earth’s moon revolves and rotates at the same speed, this is why we only see one side of the moon from Earth.
The Moon’s Orbit • The moon’s orbit is an ellipse. • Perigee- moon is closest to earth • Apogee- moon is farthest from earth
Why does the Moon Change Shape? • Phases: How much of the lighted side of the moon you can see. • Lasts about 29.5 days
Starts with a New Moon (No moon)
Waxing Crescent • Waxing= growing • Crescent= less then half of the lighted side is visible
First Quarter • You can see half of the lighted side
Waxing Gibbous • Gibbous= You can see more then half of the lighted side of the moon
Full Moon You can see the entire lighted side
Waning Gibbous • Waning- lighted side of the moon is shrinking
What causes tides? • Gravity from the moon pulls on the Earth. • Tides occur mainly because of differences in how much the moon pulls on different parts of the Earth
What are the different parts of a Shadow? • Umbra: Dark part (direct) of a shadow • Penumbra: Lighter (indirect) part of a shadow.
Solar Eclipses • The moons shadow hits the Earth
Lunar Eclipses • When the moon is in the Earth's shadow
More about Eclipses! • Eclipses can only occur during a full moon. • Eclipses are rare because the moons orbit is tilted compared to Earth
Next Eclipses • Next Solar Eclipses: May 20th, 2012 and November 13th, 2012 • Next Lunar Eclipse: June 4th, 2012
The Earths Moon • Gravity is 1/6th that of Earth • Diameter is 3476km (that is 1/4th the size of earth, about the length of the United States) • 1/80th the density of Earth (that’s light)
Features on the Moon • Craters: holes or pits created from meteors • Maria: Originally thought to be seas, but are actually low dry areas that were flooded by molten material. • Highlands: high areas of the moon
How did we get our moon? • Collision Theory • An object about the size of Mars crashed into Earth. This broke off a piece of Earth and a piece of its self. The two pieces orbited around Earth and eventually connected and formed into a sphere.
Going to the moon… • 1964-1972: US and Soviet Union sent a ton of Rockets to the moon • Discovered it was solid
Apollo 11 • July 1969 • Neil Armstrong, Buzz Aldrin, and Micheal Collins traveled to the moon. • Armstrong and Buzz were the first two men to walk on the moon. • They brought back samples to study
Credits • Created by Michelle Riccobene • All video from KLVX video streaming • All images are from Prentice Hall Science Explorer text book or Google Images ( www.google.com ) committee