Presentation on theme: "Earth, Moon and the Sun Motions of the Earth"— Presentation transcript:
1Earth, Moon and the Sun Motions of the Earth Moon Differences & Space VisitsPhases of the MoonEclipsesTides
2½ of Earth and moon are always in sunlight The moon would look like this to someone on earth:MoonSUNSUNSunlightEarthSunlight
3Because the moon revolves around Earth, it looks different each night What the moon looks like from earth:SunlightMoonKeep clicking here to fast forward timeSUNMoonMoonEarthSunlightMoonMoonMoonMoonMoonSunlight
4There are 2 ways we describe a moon phase: 1) How full is it There are 2 ways we describe a moon phase: 1) How full is it? 2) Is it growing or shrinking?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).
5Some names of moon phases Crescent: less than ½ fullGibbous: more than ½ full Waxing: getting bigger Waning: getting smaller3rd quarterWaning crescentWaning gibbousNew moonFull moonWaxing crescentWaxing gibbous1st quarter
6Can you put these moon phases in the correct order? BHADEFG
7Can you put these moon phases in the correct order? LKJMNQOP
8That’s the end of this section. Click here to go home
9Our Earth has 2 types of motion: Earth spins on its axis (this is called rotation)Earth moves around the sun (this is called revolution)North Pole
10And the moon orbits Earth. 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.Earth orbits the sun.And the moon orbits Earth.
11It looks like the sun moves around Earth, causing day and night Keep clicking here to see another day
13Day and night is caused by Earth’s rotation It looks like the sun moves across the sky – but the Earth is spinning – the sun is still!SunlightSUN121111029384Sunlight756Spacebar: start & freezePage Up: rewindSunlight
14Day and night is caused by Earth’s rotation SunsetSunlightSUN12111Midnight102Noon93Sunlight84756SunriseSunlight
16½ of the Earth and moon are always in sunlight That’s the end of this section. Click here to go homeSunlightThe moon would look like this to someone on earth:MoonSUNSUNSunlightEarthSunlight
17Because the sun is 400 times larger than the moon… Click here to see a 6 minute video of a Total Solar Eclipse (in Turkey, 2006)
18… and the moon is 400 times closer than the sun… … the moon looks the same size as the sun to everyone on Earth… and the moon is 400 times closer than the sun…MoonSun
19The moon’s orbit is slanted compared to Earth’s orbit Sun
20Be patient, my little house friend MoonBecause the moon’s orbit is slanted compared to Earth’s orbit, the moon rarely passes exactly between Earth and the sunMoonWhew! 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…MoonSunMoonBe patient, my little house friendMoonThink they’ll cross?MoonMoon
21When the moon blocks out the sun, we have a solar eclipse Yes – very coolCool!
22When the moon blocks out the sun, we have a solar eclipse I’m a tree!I can see!
25In an annular solar eclipse – moon only blocks middle of sun because the moon is a little further away from Earth
26Transit of Venus – June 8, 2004Planets between Earth and the sun (Mercury and Venus) can cause mini-eclipses, called transits.VenusSVE
27When the Earth blocks out the moon, we have a lunar eclipse Why does the moon look red instead of being completely blocked out?Can you see Earth’s shadow block out stars?It’s because some light from the sun deflects off the Earth’s atmosphere and hits the moon.
404 important differences between Earth and the moon The moon is about as ¼ as wide as the earthThe moon is covered with cratersThe moon has less gravity than the earthThe moon has no air (atmosphere) on it
41People 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.
45The moon’s gravity only 1/6 as strong as the earth’s gravity 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.You would be able to lift 6 times as much weight on the moonYou would only weigh 1/6 as much on the moonThanks to my diet, I now weigh only 30 lbsThanks to my diet, I now weigh only 180 lbs300 lbs50 lbsEarthMoon
46Remember that Galileo proved that all objects fall at the same speed if you ignore air resistance Earth
47Because the moon has no air, there is no air resistance 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.EarthMoon
48This is even more fun than gym! Neil Armstrong was the first human to walk on the moon
49This 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
50The moon is a fun place to play hide-and-seek! 97, 98, 99, Ready or not, here I come!The moon is a fun place to play hide-and-seek!
51Many countries are working together to build the International Space Station – which orbits Earth
52That’s the end of this section. Click here to go home Chiaki MukaiThat’s the end of this section. Click here to go homeKalpana ChawlaCol. Susan HelmsEileen CollinsDr. Bernard Harris7 astronauts who studied math and scienceNeil ArmstrongDr. Mae JemisonWe’ve got room for 1 more person – want to come?