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6th Unit 1b
The Universe Key Terms
Term | Definition |
---|---|
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 |