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6th Unit 1b

The Universe Key Terms

TermDefinition
Scientific models a scientific activity the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate.
Geocentric having or relating to the earth as center
Heliocentric having or relating to the sun as center
Big Bang Theory The Big Bang is a THEORY about the creation of the UNIVERSE
Milky Way The galaxy to which Earth and other components of our Solar System belong.
Comet A ball of ice and dust who orbits around the sun in a long, narrow ellipse
Asteroids Objects revolving around the sun that are too small and too numerous to be considered planets.
Meteors The streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
Meteorite When a meteoroid burns in the atmosphere and hits the ground
Meteoroid a chunk of rock or dust in space that comes from comets or asteroids
Revolution The movement of one object around another, Earth revolution around the sun is equal to one year; 365 1/4 days
Rotation The spinning of the Earth on its axis, day and night (24 hours)
Photosphere The visible surface of the Sun; the upper surface of a convecting layer of gases in the outer portion of the sun whose temperature causes it to radiate light at visible wavelengths; sunspots and faculae are observed in the photosphere.
Corona The outer atmosphere of the Sun made up of thin gases and can only be seen during a solar eclipse without telescopes its temperature is 1 - 2,000,000°C.
Chromosphere The lower level of the solar atmosphere between the photosphere and the corona.
Solar Wind streams of charged particles constantly given off by the Sun
Created by: darrin_evans
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