Presentation on theme: "home Earth, Moon and the Sun Phases of the Moon Eclipses Tides Motions of the Earth Moon Differences & Space Visits."— Presentation transcript:
home Earth, Moon and the Sun Phases of the Moon Eclipses Tides Motions of the Earth Moon Differences & Space Visits
home ½ of Earth and moon are always in sunlight Earth The moon would look like this to someone on earth: Sunlight SUNSUN SUNSUN Moon
home Earth Because the moon revolves around Earth, it looks different each night Moon Sunlight SUNSUN Keep clicking here to fast forward time What the moon looks like from earth:
home If the moon is less than ½ full, it’s called a crescent moon. If the moon is more than ½ full, it’s called a gibbous moon. If you can see the right side of the moon, it’s waxing (getting bigger). If you can see the left side of the moon, it’s waning (getting smaller). There are 2 ways we describe a moon phase: 1) How full is it? 2) Is it growing or shrinking?
home Some names of moon phases New moon Waxing crescent 1st quarter 3rd quarter Waning crescent Full moon Waxing gibbous Waning gibbous Crescent: less than ½ full Gibbous: more than ½ full Waxing: getting bigger Waning: getting smaller
home Can you put these moon phases in the correct order? A B C D E FG H
home Can you put these moon phases in the correct order? M O N K P J L Q
home That’s the end of this section. Click here to go home
home Our Earth has 2 types of motion: North Pole Earth moves around the sun (this is called revolution) Earth spins on its axis (this is called rotation)
home Earth orbits the sun. In the time it takes Earth to do 1 revolution around the sun, the moon has done about 12 revolutions around Earth. We have 12 moonths in 1 year. And the moon orbits Earth.
home It looks like the sun moves around Earth, causing day and night Keep clicking here to see another day
home Every 24 hours, Earth does 1 rotation Spacebar: start & freeze Page Up: rewind North Pole
home Day and night is caused by Earth’s rotation SUNSUN Spacebar: start & freeze Page Up: rewind It looks like the sun moves across the sky – but the Earth is spinning – the sun is still! Sunlight
home Sunlight SUNSUN Sunrise Noon Sunset Day and night is caused by Earth’s rotation Midnight
home The difference between night and day
home ½ of the Earth and moon are always in sunlight Earth The moon would look like this to someone on earth: Sunlight SUNSUN SUNSUN Moon That’s the end of this section. Click here to go home
home Because the sun is 400 times larger than the moon… Moon Sun Click here to see a 6 minute video of a Total Solar Eclipse (in Turkey, 2006)here
home … and the moon is 400 times closer than the sun… Moon Sun … the moon looks the same size as the sun to everyone on Earth
home The moon’s orbit is slanted compared to Earth’s orbit Sun Earth
home Moon Because the moon’s orbit is slanted compared to Earth’s orbit, the moon rarely passes exactly between Earth and the sun Sun Be patient, my little house friend Think they’ll cross? Whew! That was close! Well actually, when the moon passes near the sun, you cannot see the moon because we are seeing the moon’s dark side. However, let’s continue to pretend you were able to see the moon during the day…
home When the moon blocks out the sun, we have a solar eclipse Yes – very cool Cool! S M E
home When the moon blocks out the sun, we have a solar eclipse I’m a tree! I can see!
home Total solar eclipse
home Total solar eclipse
home In an annular solar eclipse – moon only blocks middle of sun because the moon is a little further away from Earth
home Planets between Earth and the sun (Mercury and Venus) can cause mini-eclipses, called transits. Transit of Venus – June 8, 2004 S V E Venus
home When the Earth blocks out the moon, we have a lunar eclipse It’s because some light from the sun deflects off the Earth’s atmosphere and hits the moon. Why does the moon look red instead of being completely blocked out? Can you see Earth’s shadow block out stars? S M E
home Partial lunar eclipse
home Mr. Ligon took this photo from his house during the Total Lunar Eclipse of February 20, 2008
home A zoom-in on the previous photo
home Sun Moon Earth Can you move the moon to create a solar eclipse? A lunar eclipse?
home The blue lines on this map show the paths of all the total solar eclipses from 1951 to 2000
home The blue lines on this map show the paths of all the total solar eclipses from 2001 to 2050 That’s the end of this section. Click here to go home
home Tide video links Tides coming in/out 1 Tides coming in/out 2 Mystery of Tides
home The moon’s gravity pulls Earth’s water toward the moon Moon
home Because Earth rotates, the same spot on earth has 2 high tides and 2 low tides about every 24 hours Moon Spacebar: freeze Page Up: rewind
home Make high tide Make low tide
home The French castle Mont Saint Michel is sometimes an island That’s the end of this section. Click here to go home
home High tide and low tide, at the same place
home 4 important differences between Earth and the moon 1.The moon is about as ¼ as wide as the earth 2.The moon is covered with craters 3.The moon has less gravity than the earth 4.The moon has no air (atmosphere) on it
home People first thought the dark, flat parts of the moon were oceans Some people named these dark regions maria – the Latin word for ocean. However, these regions are really dried out lava beds.
home Many craters can be seen easily from earth
home Moon craters were caused by objects in space that crashed into the moon
home Moon craters come in all sizes
home The moon’s gravity only 1/6 as strong as the earth’s gravity EarthMoon Even if you jumped as hard as you could, you would not float away from the moon. The moon has less gravity – not no gravity. To escape the moon, you must go about 5000 m.p.h. 50 lbs 300 lbs You would be able to lift 6 times as much weight on the moon You would only weigh 1/6 as much on the moon Thanks to my diet, I now weigh only 180 lbs Thanks to my diet, I now weigh only 30 lbs
home Remember that Galileo proved that all objects fall at the same speed if you ignore air resistance Earth
home Because the moon has no air, there is no air resistance EarthMoon On the earth, the air slows down the falling feather. The bowling ball is too heavy to be stopped by the air. On the moon, there is no air to slow down the falling feather. The feather falls as quickly as the bowling ball.
home Neil Armstrong was the first human to walk on the moon This is even more fun than gym!
home This photograph was taken during the first moon landing (1969) by astronaut Michael Collins – you can see the moon below and the earth in the distance
home The moon is a fun place to play hide-and- seek! 97, 98, 99, 100. Ready or not, here I come!
home Many countries are working together to build the International Space Station – which orbits Earth
home Dr. Mae Jemison Eileen Collins Chiaki Mukai Kalpana Chawla Dr. Bernard Harris Neil Armstrong Col. Susan Helms We’ve got room for 1 more person – want to come? That’s the end of this section. Click here to go home 7 astronauts who studied math and science
M V Our Solar System E M J S U N P Sun The closer a planet is to the sun, the faster it moves Sometimes Pluto is closer to the sun than Neptune