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6th Grade Science

6th Grade Space Science Vocabulary

TermDefinition
Solar System The sun and all of the bodies that orbit the sun
Terrestrial Planets The four small, dense, rocky planets that orbit closest to the sun (inner planets)
Astronomical Unit The average distance between Earth and the Sun
Gas Giant A large planet that has a deep, massive atmosphere (outer planet)
Comet A small body of ice, rock and dust follows an elliptical orbit around the sun
Asteroid Small, irregularly shaped, rocky object that orbits the sun
Meteoroid A relatively small rocky body that travels through space
Meteor A bright streak of light that results when a meteoroid burns up in Earth's atmosphere
Meteorite A meteoroid that reaches Earth's surface without burning up
Rotation The spinning of an object, such as a planet, on its axis
Revolution The motion of one body around another, like Earth's orbit around the sun
Axis A line through an object around which it rotates
Day The time is takes a planet to make one full revolution on its axis
Year The time it takes a planet to make one full revolution
season A division of the yeart that is characterized by temperature and other weather trends
Lunar (moon) Phases The different appearances of the moon
Eclipse An event in which the shadow of one celestial body falls on another
Tide Daily changes in the level of ocean water
Created by: SSC