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Rotation The spinning motion of a planet about its axis. All planets/moons rotate.
Axis Imaginary line passing through the Earth's center and poles
Earth's Rotation Causes... Day and night. It takes 24 hours to make a complete rotation on Earth.
Revolution The movement of one object around another.
Revolution of Planets All planets in our solar system revolve around the Sun.
Revolution of Moons All Moons revolve around their Planet.
Gravity The attractive force between two objects depends on mass and distance.
Inertia The tendency of a moving object to continue in a straight line or a stationary object to remain in place unless acted upon by another object.
Orbit The path of an object as it revolves around another object in space.
Latitude The measurement of distance from the Equator.
Solstice The two days of the year at which the sun is directly overhead, at either 23.5 degrees North or 23.5 degrees South.
Equinox Two days of the year on which either hemisphere is tilted toward or away from the sun.
Vernal Equinox The day of the year that marks the beginning of Spring in the Northern Hemisphere.
Autumnal Equinox The day of the year that marks the beginning of Fall in the Northern Hemisphere.
Astronomy The study of the moon, stars, and other objects in space.
Phase One of the different shapes of the Moon as seen from Earth.
Eclipse The partial or total blocking of one object by another.
Solar Eclipse The blocking of sunlight to Earth that occurs when the Moon is between the Sun and Earth.
Lunar Eclipse The blocking of sunlight to the Moon that occurs when the Earth is between the Sun and the Moon.
Umbra The darkest part of a shadow.
Penumbra The part of a shadow surrounding the darkest part.
Tide The rise and fall of water levels in the ocean.
Spring Tide A tide with the greatest difference between low and high tides.
Neap Tide A tide with the least difference between low and high tides.
Satellite Any object that revolves around another object in space.
Geosynchronous Orbit The orbit of a satellite that revolves around Earth at the same rate that Earth rotates.
Telescope A device built to study distant objects by making them appear closer.
Crater A round pit on the Moon's surface.
Maria Dark, flat regions on the Moon's surface.
Newton's 1st Law (Law of Inertia) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's 2nd Law F = m * a (Force = mass * acceleration)
Newton's 3rd Law For every action there is an equal and opposite reaction.
Created by: GeneralMacho