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north pole

the point on Earth located at 90 degrees north latitude, where the lines of longitude meet

prime meridian

the imaginary line that divides the earth in the eastern and western hemisphere, at 0 degrees longitude. (runs through Greenwich, England)


imaginary lines that run west to east and are used to measure distance north & south of the Equator


Imaginary lines that run from the North to the South Pole & are used to measure distance east or west of the Prime Meridian

earth's axis

23.5 tilt that causes Earth's seasons...the point of earth's rotation

apparent motion

when something looks like it is moving (like the sun looks it is moving, but the Earth is actually moving)


circular movement around an axis

lunar eclipse

the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon


the periodic rise and fall of the sea level under the gravitational pull of the moon


A meteoroid that burns up in Earth's atmosphere.


an imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole; 0 degrees latitude


8th planet from the sun


The path of an object as it revolves around another object in space.

moon phases

changing appearances of the moon as seen from earth

solar eclipse

when the moon passes between earth and the sun, blocking the sunlight from reaching earth


2nd planet from the sun, very hot atmosphere


3rd planet from the sun; has an atmosphere that protects life and surface temperatures that allow water to exist as a solid, liquid, and gas


4th planet from the sun


5th planet from the sun & the largest planet


6th planet from the sun & the 2nd largest planet; has a complex ring system


7th planet from the Sun; is large and gaseous with thin, dark rings and rotates tilted on its side

solar system

system of nine planets, including Earth, and other objects that revolve around the Sun


frozen chunks of rocks and metalllic particles that orbit the sun in long elliptical paths


Earth's natural satellite


a piece of rock similar to the material that formed into planets; usually found in the asteroid belt


the smallest planet and the nearest to the sun


All matter and energy, including the earth and the galaxies

celestial objects

any of the natural objects that can be seen in or including starts, planets, moons, asteroids, galaxies, and comets


following a circular pattern, move in a cycle, regularly repeated


a hot sphere of gases that gives off energy


the closest star to Earth and the center of our solar system, also main source of energy

South Pole

the point on Earth located at 90 degrees South latitude where the lines of longitude meet


period of equal days and nights; the beginning of spring and autumn; Ex. vernal/autumnal equinox;


point or time at which the sun is farthest from the equator
Ex: summer/winter

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