3.3.b Planets of the Solar System
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Science
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9th - 12th Grade
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Practice Problem
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Medium
Standards-aligned
Jessica English
Used 79+ times
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6 Slides • 6 Questions
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3.3.b Planets of the Solar System
Evaluate the Planets of the Solar System
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Definition of a Planet
In 2006, the International Astronomical Union defined a planet as an object that meets 3 criteria:
1. It orbits a star.
2. It has enough mass (and enough gravity) to be spherical.
3. It has cleared the areas of its orbit of planet-sized objects.
All 8 planets meet these criteria!
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Multiple Select
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Multiple Choice
Examine Pluto in this image. Why is Pluto no longer considered a planet?
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Order within the Solar System
The bodies of the Solar System are ordered and arranged due to the way the Solar System formed (according to the Solar Nebula Theory, condensation, and accretion).
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Inner/Terrestrial Planets
Closer to the Sun ("inner" Solar System)
Smaller, rocky and solid
0 to 2 moons per planet (3 total)
No rings
Warmed by solar radiation
Mercury, Venus, Earth, and Mars
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Outer/Jovian Planets
Farther from Sun ("outer" Solar System)
Larger and mostly gas and ice
Many moons
All have rings
Cooler due to distance from the Sun
Jupiter, Saturn, Uranus, and Neptune
Note Earth in picture for scale!
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Multiple Choice
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Multiple Select
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Multiple Select
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Multiple Select
3.3.b Planets of the Solar System
Evaluate the Planets of the Solar System
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