equator - the imaginary line at 0 degrees latitude that divides Earth into the Northern and Southern hemispheres, Northern hemisphere - the half of the Earth that is north of the equator, axis - imaginary line that runs through the Earth's center from the North Pole to the South Pole and the Earth spins around it, rotate - to move in a circle around an axis or center; the earth takes 24 hours to make one rotation around its axis, revolve - move in a circular orbit around another object; the orbit of the Earth around the sun takes 365.25 days for one revolution, high tide - the ocean water reaches its highest level; 2 happen everyday, low tide - when the ocean water reaches its lowest level; 2 happen everyday, spring tides - occur during new and full moon when the moon, Earth, and Sun align in a straight line; result in higher high tides and lower low tides, neap tides - occur during 1st and 3rd quarter when the moon, Earth, and Sun are at 90 degree angles; results in lower high tides and higher low tides, tilt - the angle a planet's rotation axis makes with the plane of its orbit.; Earth is currently tilted 23.5° from this plane, Southern hemisphere - the half of the Earth that is south of the equator,

6th Seasons and Tides

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