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What is the criteria needed for an object to be considered a planet? Why is Pluto not a planet?
1. Needs to orbit Sun 2. Needs to have enough gravity to pull itself into a spherical shape 3. needs to dominate its neighborhood.
Pluto does not dominate its neighborhood, meaning it does not consume objects that are nearby like the other planets do.
If we did not have a magnetic field, what would happen to the earth?
The solar winds would blast our planet, evaporating the water and making earth unlivable like Mars.
What is the Kuiper Belt? Where is it located?
A place where comets exist. It is a region outside the orbit of Neptune.
Where did Earth get all the water it has today?
Blizzard of Asteroids and comets came flying into the inner solar system and hit earth bringing water in the form of ice with them. They brought just the right amount.
What two factors enable Earth to support life?
1. Formed at just the right distance from the sun. 2. We have water.
What characteristics do outer planets share?
They are large, don't have any known solid surfaces, have multiple moons
Name the planets in order (closest to the sun to farthest)
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, & Neptune.
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