earth moon sun system tides. a tide is…. the periodic rise and fall of the waters of the ocean and...
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Earth Moon Sun System
TIDES
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A TIDE IS….
• The periodic rise and fall of the waters of the ocean and its inlets, produced by the attraction of the moon and sun
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Usually we say…
• the tide is high when the water is deeper, and low when the water is more shallow.
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Tides are “bulges” of water.
The moon pulls the water AND THE EARTH to the right.
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High tides occur when…..
• The Earth’s rotation carries us into a bulge.
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Low tides occur when….
• The earth’s rotation carries us OUT OF a bulge.
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Tides will be “higher” when….
The sun, moon and earth are lined up.
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Tides will be lower when…
The sun and moon are at right angles to the earth.
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Tide strength is also influenced by distance between earth, moon and sun
(Tides stronger at perihelion and perigee.)
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Aphelion???
Point in an orbit farthest from sun
(From GK, “apo” off / away and helios, sun)
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Perihelion
Point in an orbit nearest the sun
(From the GK “peri”—near and “helios”)
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Apogee
Point in an orbit ……..?
(From the GK “apo” and “gaia”)
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Perigee
Point in an orbit …..
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