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Science Sec.1+2

Moon phases, tides, eclipses, rotation, revolution, and tilt.

QuestionAnswer
Astronomy The study of the moon, stars, planets, and other objects in space.
Axis The imaginary line that passes through Earth's center and the North and South poles.
Rotation Earth's spinning on its axis.
Revolution The movement of one object around another is called the revolution.
Orbit Earth's path as it travels around the sun.
Latitude The measurement of distance from the equator, expresses in degrees north or south.
Solstice The two days of the year when the noon sun is overhead at 23.5 degrees south or north.
Equinox The two days of the year when the noon sun is directly overhead.
Vernal Equinox The spring equinox that occurs around March 21. It marks the beginning of spring in the Northern Hemisphere and fall in the Southern Hemisphere.
Autumnal Equinox The fall equinox that occurs around September 23. It marks the beginning of fall in the Northern Hemisphere and the beginning of spring in the Southern Hemisphere.
Phases (Moon) The different shapes of the moon you see from Earth. The phase of the moon you see depends on how much of the sunlit side of the mon faces Earth.
Eclipse (Solar - SME Lunar - SEM) When an object in space comes between the sun and a third object. This happens when the moons shadow hits Earth or when Earths' shadow hits the moon.
Umbra The darkest part of the moon or earths' shadow when it hits another object. It is cone shaped.
Penumbra The larger part of the shadow of moon when it hits Earth. Part of the sun is visible.
Tides The rise and the fall of the water. They occur mainly because of differences in how much the moon pulls on different parts of the Earth.
Gravity The force that pulls two objects together. The force depends on the masses of each object and the distance from each other they are.
Spring Tide The combined forces of Earth and the moons gravity create the greatest difference between low and high tide.
Neap Tide The least difference between low and high tide.
Created by: Rachel13101
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