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5/31/11 warm up
• What is solar eclipse?
• What is lunar eclipse?
Solar Eclipse
When the Moon moves directly between Earth
and the Sun, and the Moon casts a shadow on
Earth’s surface.
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Lunar Eclipse
•When Earth is between the Sun and the Moon,
causing Earth to cast its shadow on the Moon.
•Can only take place when the Moon is full.
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My Very Educated Mother Just Served Us Nine Pies.
C11L3 The planets
• Planet: a celestial body of moderate size
moving in an elliptical orbit around a star.
The planets have different sizes and distances
from the Sun.
inner planets
Mercury, Venus, Earth,
Mars,
outer planets
Jupiter, Saturn, Uranus,
Neptune, Pluto
Inner planets
• Are rocky and have craters caused by
meteors on their surfaces.
Mercury
• The closest planet to the sun
• Moves around the sun in a highly elliptical
orbit
• Has no moon
• Almost no atmosphere—high daytime
temperatures, low nighttime temperature
Venus
• The second planet from the sun
• Similar to Earth in size, mass, composition, and
distance from the Sun
• Atmosphere mostly carbon dioxide (absorbs
infrared radiation emitted by the planets surface
and traps heat in the atmosphere)
• Period of rotation: 243 earth day
• Period of revolution: 225 earth day
• A day is longer than its year.
Earth
• The only body in our solar system known
to have life on it.
Mars
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The fourth planet from the Sun
Has a very thin atmosphere
Has two moons
Collected evidence—water close to the
surface of Mars and in Mars’ polar ice
caps
• No evidence of life on Mars.
•Craters cover the surface of Mercury.
•Volcanoes shape the surface of Venus.
•Erosion changes the appearance of Mars.
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