earth’s moon ( aka. luna) cornell notes page 69 “how does the moon affect the earth?”
TRANSCRIPT
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Earth’s Moon (aka. Luna)
Cornell Notes page 69“How does the moon affect the
earth?”
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How far away is the MOON?
• 380,000 km (about 239,000 miles)
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What is a SATELLITE?
• A natural or man made object that revolves around a planet
• (A natural satellite is a MOON)
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What is the moon doing out in space?
• Revolving around the Earth in a counterclockwise direction
• Rotating on its axis as it goes around the Earth
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Where did the Moon
come from?
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Giant Impact Theory
• Earth struck by large body, size of Mars.
• Part of body + Earth flung into space.
• Captured by gravity of Earth.
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What is Gravity?
• Natural phenomenon by which all physical bodies (anything with mass) attract each other
• holds celestial bodies together
• keeps celestial bodies in orbit
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What effect does the moon have on Earth?
• Tides- • rise and fall of water levels due to gravitational forces
• Occur twice a day (2 high tides, 2 low tides)
http://home.hiwaay.net/~krcool/Astro/moon/moontides/
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high tide
low tide
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How are Tides created?
• (3 ways)1. Because the Earth
and the moon are attracted to each other
http://home.hiwaay.net/~krcool/Astro/moon/moontides/
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Moon and earth are attracted to each other by gravity
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Tides are also created by:
•2. the rotation of the earth
•3. and the sun’s gravity
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The sun can affect the tides, too
Spring Tides
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Tides are not waves!
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What are Spring tides?
• Tides that produce the greatest difference between high and low tides—The biggest tides
• Occur twice a month
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When do spring tides occur?
• Once at the full moon and once at the new moon
• When the sun moon and earth are nearly in a lineSpring Tides combined with big storms
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Spring Tides –the sun
and the moon line up
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What are NEAP Tides?
• Tides that produce the least difference between high and low tides—The smallest tides
• Occur twice a month
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When do neap tides occur?
• Once at the first quarter and once at the third quarter
• When the sun moon and earth are at right angles to each other
http://www.space.gc.ca/asc/eng/educators/resources/astronomy/multimedia/module3/tides/tides.swf
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The neap tides –the smallest tides –when the sun and moon are at a 90 angle
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•What other effects do we have from the moon??
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