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26 Cards in this Set
- Front
- Back
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Who is Ptolemy and what was his views on the solar system?
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Geocentric- earth is center of solar system
includes earth moon sun and 5 planets (mercury,venus,mar, juipiter, staurn) all revolve around the earth. |
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What are Copernicus's view of the solar system?
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Heliocentric- sun is the center of the solar system
moon revolves around the earth; earth and moon together revovle around sun |
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Name the nine planets and what else is in our solar system?
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Sun, Mercury, Venus, Earth, MArs, Jupiter, Saturn, Uranus, Neptune, Pluto.
91moons,asteriod,comets,meteoroids,stars |
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How did the solar system form?
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- 4.6 billion years ago solar system was a vast swirling cloud of gas, ice, and dust called a nebulae
- Gravity started contracting particles into a large tightly packed spinning disk Matter condensed in the center attracting 99% of all mater in solar system Center so hot (10 million degrees C) nuclear fusion begins and the sun was born. - Rest of material cooled and clumped into scattered solids - Clumps collided and combined to form the planets: Inner planets- made of heavy elements- sun couldn’t push them away. Outer planter- made of light gasses that got pushed away from sun. |
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What keeps the planets in orbit?
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gravity and inertia
gravity keeps sun inertia keeps planets |
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what are keplers laws of planetary motion
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1. Ellipitical orbits- not circular
2.Sun not centerd in the orbit 3. |
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no question
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Closer planets travel faster around the sun than farther planets
- Inner planets- smaller orbit and faster speed. - Outer planets- larger orbit and slower speed. |
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what is a meteoriod?
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a chunk of rock (not as big as asteroids) floating around in space.
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What is a meteors?
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“shooting stars”- a meteoroid that enters the earth’s atmosphere.
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what is a meteorite
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a meteor that does not completely burn and strikes a planet.
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what is an asteriod?
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a piece of rock similar to but smaller than a planet orbiting the sun. Larger than a meteoroid. Meteors do not orbit the sun
- Usually found in the asteroid belt between Mars and Jupiter - Pieces of a planet that never formed? - Irregular shapes- not round - Largest is Ceres (620-mi) |
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comets
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- A mass of rock and dust mixed with frozen water, methane and ammonia “dirty snowball”
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structure of a comet?
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Head, Nucleus, Coma, Tail
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comets.....
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are formed by solr wind
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ALWAYS POINTS AWAY FROM THE SUN!!!!
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information
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name from largest to smallest the rankings of the planets
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Jupiter- 1st
Saturn- 2nd Uranus-3rd Neptune- 4th Earth- 5th Venus- 6th Mars- 7th Mercury- 8th Pluto-9th |
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name the planet first discovered by tele.
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Uranus
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name the planet discorved by math
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Neptune
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which planets have rings?
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Jupiter Saturn Uranus Neptune
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Mercurys atmospere
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has no atmoshpere
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where is the asteriod belt located?
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between JUpiter and mars
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Which direction does the tail of the comet point? Why?
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The tail always points away from the sun. This happens because of the solar wind.
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Does a comet always have a tail? Explain.
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No because if the comets are far from the sun the comet isn’t melting.
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information
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metoeriods come from passing comets
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why does the year get llonger when u get farther away from the sun?
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b/c it takes longer ot orbit the sun
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whic planets have moons?
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Earth (1), Mars (2), Jupiter (61), Saturn(33), Uranus (27), Neptune (13), Pluto (1)
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