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34 terms

Earth Science/Astronomy

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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)
latitude
imaginary lines that run west to east and are used to measure distance north & south of the Equator
longitude
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)
rotation
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
tide
the periodic rise and fall of the sea level under the gravitational pull of the moon
meteor
A meteoroid that burns up in Earth's atmosphere.
equator
an imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole; 0 degrees latitude
neptune
8th planet from the sun
orbit
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
venus
2nd planet from the sun, very hot atmosphere
earth
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
mars
4th planet from the sun
jupiter
5th planet from the sun & the largest planet
saturn
6th planet from the sun & the 2nd largest planet; has a complex ring system
uranus
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
comet
frozen chunks of rocks and metalllic particles that orbit the sun in long elliptical paths
moon
Earth's natural satellite
asteroid
a piece of rock similar to the material that formed into planets; usually found in the asteroid belt
mercury
the smallest planet and the nearest to the sun
universe
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
cyclical
following a circular pattern, move in a cycle, regularly repeated
star
a hot sphere of gases that gives off energy
sun
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
equinox
period of equal days and nights; the beginning of spring and autumn; Ex. vernal/autumnal equinox;
solstice
point or time at which the sun is farthest from the equator
Ex: summer/winter