4th Grade-Ch 18 Lesson 1 What makes up the universe
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4th Grade-Ch 18 Lesson 1 What makes up the universe

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4th Grade-Ch 18 Lesson 1 What makes up the universe 4th Grade-Ch 18 Lesson 1 What makes up the universe Presentation Transcript

  • Ch. 18 Lesson 1 What makes up the universe?
  • universe
    • all of space & everything in it
  • galaxy
    • system of dust, gas & millions of stars held together by gravity
  • What galaxy do we live in?
  •  
  • astronomy
    • study of Sun, Moon, stars & other objects in space
  • solar system
    • Sun, planets, their moons, etc.
      • all revolve around Sun
  • Inv. 1 What is the Solar System Made of ? Ch. 2
  • asteroid belt
    • group of asteroids located between inner & outer planets
  •  
  • asteroid
    • rocky object that orbits the Sun
    • too small to be considered a planet
  •  
  • The Asteroid Belt [03:21]
  • planet star
    • medium-sized star
    • largest object in our solar system
    • magnetic field
  • If the Sun were hollow, we could fit one million Earth-sized planets inside of it!
  •  
  • The sun’s gravity is the most powerful force in the solar system because the sun’s mass is so large. 99.8 % of the mass of the solar system is in the sun.
  • Time to review
  • universe
    • all of space & everything in it
  • asteroid
    • rocky object that orbits the Sun
    • too small to be considered a planet
    • is a ____-sized
    • star.
    medium
  • asteroid belt
    • group of asteroids located between inner & outer planets
  • astronomy
    • study of Sun, Moon, stars & other objects in space
  • galaxy
    • system of dust, gas & millions of stars held together by gravity
  • What galaxy do we live in?
  •  
    • largest body in our solar system