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Space: chpt. 2 vocab

6TH GRADE Chapter 2 space vocabulary

Geocentric Earth is at the center of the solar system. Ptolemy thought this.
Heliocentric The sun is at the center of the solar system. Copernicus and Galileo supported this.
Ellipse Elongated circles. Kepler discovered this.
Inertia The other factor that combines with gravity to keep the planets in orbit. Newton thought of this.
Nuclear Fusion When hydrogen atoms combine and turn into helium.
Core The center of the sun.
Photosphere The part of the sun that can be seen
Chromosphere "Crown" only seen during solar eclipses. A ring that looks like a halo.
Corona The "spikes or rays" on the sun. Extends millions of kilometers into space.
Solar Wind A stream of charged particles. Causes auroras.
Sunspot Spots on the sun that appear dark because they are cooler than the rest of the sun.
Prominence Looping masses of gas on the sun's surface.
Solar Flare Huge explosions of gas. Emits many charged particles.
Terrestrial Planets The inner planets. They are hard, and rocky. These include Mercury, Venus, Earth, and Mars.
Retrograde Rotation Rotating opposite of most planets. East to West.
Greenhouse Effect The trapping of heat by a planets atmosphere.
Gas Giant The four outer planets. These include Jupiter, Uranus, Saturn, and Neptune. They do not have a solid surface.
Comet A giant ball of ice and dust. Many comets come from the Kuiper Belt.
Asteroid Belt
Extraterrestrial Life
Created by: 20pennel