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6th grade science 6.8

6.8 science with neap tides, meteors, and ext. definitions
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revolution
the movement of an object around another object
astroid belt
region of space where the density of astroids is high, located between the orbits of mars and jupiter
astroid
any of thousands of dense rocky objects typically in orbit around the sun between mars and jupiter
seasons
a season is a division of the year marked by changes in wearer and hours of daylight. caused by tilt of the earth's axis
solar eclipse
occurs when the moon passes the sun, blocking the sunlight reatching the earth
solar system
the sun together with the 8 planets and all other celestial bodies that orbits the sun
space shuttle
a reusable spacecraft that takes off like a rocket and then returns to earth like an airplane
spring tides
unusually high tides tides that occur during a full moon or new moon
tides
the daily rise and fall of the earth's waters due to the gravitational force created by the moon and the sun on the earth
universe
all mater and energy in space
satellite
any object that revolves another object in space
astronomer
a scientist who studies celestial bodies such as, planets, stars, and galaxies
axis
An imaginary line that pass extends through Earth's center between the North and South poles
collision theory
atoms, ions, and molecules can react to form products when they collide, provided that the particles have enough kinetic energy
comet
A ball of frozen dust and rock that orbits the sun and has a tail that glows
galaxy
massive system of stars, gas, and dust
solar system
the sun together with the 8 planets and all other celestial bodies that orbit the sun
outer planets
jovian planets that are gasses, found outside of the astriod belt (except pluto is solid)
rotation
the spinning motion of a planet about its axis
probe
an interplanetary spacecraft
geocentric theory
the theory whereby the earth is found in the center of the solar system
gravity
the attractive force between 2 objects
heliocentric theory
the theory whereby the sun is found in the center of the solar system
inner planets
terrestrial planets that are dense, solid planets inside of the astriod belt
lunar eclipse
occurs at a full moon when earth is directly between the moon and the sun
meteor
a streak of light in the sky produced by the burning of a meteoroid in the earth's atmosphere
neap tides
unusually low tides that occur during the first and third quarters of the moon