Science (Planets/space)
Terms
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- What are Meteoroids
- A chunk of Rock / Floating around in space
- What are meteors?
- "shooting Star" entered in the earths atmosphere
- What are meteorites?
- a Meteor that dose not completely burn and strikes on earth/land
- Why are their visible craters on the moon and mercury but not on Earth and Venus?
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Erosions
Our atmosphere - 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) - Largest to Smallest
- Jupiter Saturn Uranus Neptune Earth Venus Mars Murcury Pluto
- 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 - what are Comets
- A mass of rock and dust mixed with frozen water, methane, and ammonia “Dirty Snowballsâ€
- 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 - Comets Originate in..
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-The oort cloud
-Kuiper belt - 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 - 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 - What are the 9 planets?
- Mercury / Venus / Earth / Mars / Jupiter / Saturn / Uranus / Neptune / Pluto
- How are the planets divided
- Rocky / Gas planets
- What % of mass dose the sun have in all the Solar System
- 99.8%
- what is a Nebulae
- A huge cloud of dust
- 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