earth’s natural satellite the...
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THE MOON Earth’s natural satellite
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1.THE MOON IS EARTH’S NATURAL SATELLITE
⦿ Earth’s pull of gravity keeps moon as our natural satellite
⦿ Takes 3 days to get there with a space craft⦿ Only one side of the moon is seen from earth
◼ This is because the moon turns once on its axis each time it orbits the Earth • Near side- side we can see • Far side-side we can’t see
◼ moon demo NASA VIDEO
⦿ The moon rotates counterclockwise
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2. MOON STRUCTURE
⦿ Dark part of the moon is called mare (plural =maria)
◼ Not bodies of water, but different types of solid rock◼ Moon has no air, water, clouds, or life forms
⦿ Light part of moon called highlands
◼ Covered with impact craters, no erosion so craters stay untouched
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LUNAR MARE
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3. MOON INTERIOR
⦿ 3 main layers - crust, mantle, and core
⦿ Core is similar to earth, but has a partially melted layer outside the liquid outer core
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4. MOON FORMATION⦿ Collision-
◼ An early version of earth is hit by a smaller object
⦿ Re-forming-◼ The many pieces pull each other into orbit
around the earth
⦿ Earth and Moon-◼ The moon forms from the material that orbits the
new earth
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5. MOON PHASES⦿ It takes one month for the moon to orbit
around the Earth
⦿ As the moon orbits around the earth, sunlight reflects off of the moon making it visible in the night sky.
⦿ From earth, we can only see certain portions of the lit moon
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6. MOON PHASES Cont. ⦿ Full lunar phase takes one month (4 weeks)
◼ Weeks 1-2 are waxing(growing) phases ◼ Weeks 3-4 are waning (shrinking) phases
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7. ECLIPSES⦿ Sun, moon, and earth line up exactly a
shadow crosses Earth or the moon ◼ Make either the sun or moon grow dark
⦿ Umbra- dark part of shadow⦿ Penumbra- light part of shadow
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8. LUNAR ECLIPSE⦿ Moon moves into the Earth’s shadow (umbra,
and penumbra)◼ Total lunar eclipse- moon moves completely into
Earth’s umbra
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LUNAR ECLIPSE
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9. SOLAR ECLIPSE⦿ When the moon passes in between the Earth
and the Sun ◼ Moon’s umbra and penumbra create shadow on
Earth
⦿ Only locations in the path of the moon’s shadow experience a solar eclipse
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SOLAR ECLIPSE
Shadow the moon leaves on Earth
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SOLAR ECLIPSE