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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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