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Topic #2. Section 1: The Solar System. Planetary Groups. Terrestrial Planets Mercury Venus Earth Mars Highlighted by relatively small size and rocky surface. Jovian Planets Jupiter Saturn Uranus Neptune Highlighted by a very large size and primarily made up of gases.

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topic 2

Topic #2

Section 1: The Solar System

planetary groups
Planetary Groups

Terrestrial Planets

  • Mercury
  • Venus
  • Earth
  • Mars
  • Highlighted by relatively small size and rocky surface.

Jovian Planets

  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Highlighted by a very large size and primarily made up of gases.
planetary groups1
Planetary Groups
  • The terrestrial planets are much more dense than the Jovian planets.
planet makeup
Planet Makeup
  • Planets are composed of three different categories of substances.
  • Gases: Substances that melt at very low temperatures
  • Rocks: Solid substances with high melting points.
  • Ices: Solids that have a wide range of melting and freezing points.
planetary makeup
Planetary Makeup
  • Jovian planets have very deep and thick atmospheres.
    • The majority of the mass of the Jovian planets is found in their atmospheres.
  • Terrestrial planets have very thin atmospheres because they are located closer to the sun.
    • The suns gravity attracts the gas molecules away from the small terrestrial planets.
formation of the solar system
Formation of the Solar System
  • Clouds of gas and dust in space are called nebulas.
  • The Nebular Theory states that our solar system formed from the increasing gravity of one of these spinning nebulas.
  • As the gas and dust in this nebula began colliding small irregularly shaped objects called planetesimals began to form.
    • These planetesimals would later form into planets.
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