8th Grade Chapter 1 Lesson 6

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  • 1. 8 th Grade- Chapter 1 Lesson 6 Pgs.39-49 For Student Use Only
  • 2. The Planets
    • Planet- “wanderers” were named planets because the moved through the constellations
    • The planets are divided into Inner planets and Outer Planets
      • Inner planets- nearest Sun (Mercury, Venus, Earth, Mars)
      • Outer planets-farther from Sun (Jupiter, Saturn, Uranus, Neptune, Pluto)
  • 3. The Planets
    • Mercury-
      • Rocky, barren, craters- similar to our moon
      • 2 nd smallest planet, fastest planet (30mi/second)
      • No atmosphere (extreme temps)
  • 4. The Planets
    • Venus-
      • Starlike planet- called morning or evening star depending on when the star is visible)
      • Covered in highly reflective clouds made of sulfuric acid
      • Earth’s twin planet
      • Run-away Greenhouse effect- hottest planet
      • High pressure, and no water on surface
  • 5. The Planets
    • Mars-
      • Red Planet- from iron rust in sand
      • 2 moons- Phobos and Deimos
      • Has a thin atmosphere
      • Rugged terrain
      • Physical Features:
        • Valles Marineris- big trench
        • Olympus Mons- volcano (3x as large as Mt. Everest)
  • 6. The Planets
    • Jupiter
      • Largest planet in Solar System
      • Gas Giant- made of Hydrogen and Helium
      • Great Red Spot is an anticyclone
      • Strong magnetic field
      • Has many moons (28 have been discovered now)-
        • 4 most known moons: Ganymede (largest moon), Europa, Callisto, and Io (is home to the first active volcano ever discovered on another planet)
  • 7. The Planets
    • Saturn
      • Has icy, dusty rings
      • Gas Giant- Hydrogen and Helium
      • Least Dense planet
      • Has many moons- (30 have been discovered now)-
        • Most known moons- Mimas (golf ball), Iapetus, Phoebe and Titan (best known moon)
  • 8. The Planets
    • Uranus
      • Third largest planet
      • Possibly has liquid water that covers a solid core the size of Earth
      • Has many moons- (21 discovered now)- most known moons- Miranda
      • Has rings like Saturn
      • Rotates on its side
  • 9. The Planets
    • Neptune
      • Methane makes Neptune blue
      • Strong winds
      • Great Dark Spot- (might be a cyclone)
      • Possibly mostly water like Uranus
      • Many moons- most known- Triton (atmosphere and magnetic field)
  • 10. The Planets
    • Pluto
      • No longer the 9 th planet
      • Smallest planet (more like a moon)
      • Double planet- Charon (moon) and Pluto orbit each other and are about the same size
      • Pluto and Neptune cross orbits and Neptune becomes the farthest planet