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17 Cards in this Set
- Front
- Back
What are Meteoroids
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A chunk of Rock / Floating around in space
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What are meteors?
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"shooting Star" entered in the earths atmosphere
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What are meteorites?
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a Meteor that dose not completely burn and strikes on earth/land
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Why are their visible craters on the moon and mercury but not on Earth and Venus?
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Erosions
Our atmosphere |
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what are Asteroids
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pieces of rock similar to but smaller then a planet orbiting the sun
Usually found in the asteroid belt between mars and Jupiter (Orbiting the sun) Pieces of planets that never formed? (They thought but not true) Irregular shaped – not round Largest is Ceres (620-mi) |
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Largest to Smallest
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Jupiter Saturn Uranus Neptune Earth Venus Mars Murcury Pluto
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What is the difference between Meteors and Asteroids
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Larger then meteoroids
Meteors do not orbit the sun Asteroids are Usually founding the asteroid belt between Mars and Jupiter Asteroids are Irregularly shaped –not round |
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what are Comets
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A mass of rock and dust mixed with frozen water, methane, and ammonia “Dirty Snowballs”
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What are the parts of the Comet
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Head-
Nucleus – Solid center of the comet coma – gas cloud surrounding somet Tail – trial of gas behind the comet Formed by solar wind – only present close to sun ALWAYS POINS AWAY FROM THE SUN May be millions of miles long Origin- Oort Cloud outside the orbit of Pluto Famous comets |
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Comets Originate in..
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-The oort cloud
-Kuiper belt |
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Ptolemy said
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Geocentic
Earth is the center of the solar system --Includes – earth, moon, sun, 5 planets Mercury, Venus, Mars, Jupiter, and Saturn). And sphere of stars --All revolve around the earth |
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Copernicus said..
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--Heliocentric- Sun is the center of the solar system
--Moon revolves around the earth; earth and moon revolve around the sun --Daily movement of sun and stars caused rotation of the earth |
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What are the 9 planets?
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Mercury / Venus / Earth / Mars / Jupiter / Saturn / Uranus / Neptune / Pluto
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How are the planets divided
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Rocky / Gas planets
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What % of mass dose the sun have in all the Solar System
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99.8%
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what is a Nebulae
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A huge cloud of dust
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How was the Solar System Formed
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--About 4.6 billion years ago our solar system was a vast swirling cloud of gas, ice, and dust called a nebula
--gravity started contracting particles into a large tightly packed spinning disk. --presure caused it to heat up and burn |