Inner planets

1
Inner Planets

• Complete Section 2 Study Guide

2
Inner Solar System Orbit
The Path of Orbit
3
Inner Planets

• Mercury
• Venus
• Earth
• Mars

• Terrestrial planets
• made up of rocks
• smaller denser than the other planets

4
Mercury

• Mercury is solid and is covered with craters.
• Mercury has almost no atmosphere.
• Mercury is the smallest planet.
• .055 x Earth
• -173 to 427 C
• 70 metal, 30 silicates
• Mariner 10 Messenger space probes

5
Venus

• Venus takes 8 months to turn on its axis
  rotates counter-clockwise
• The surface is rocky and very hot.
• .815 x size Earth
• Average temp of 462C
• The atmosphere (CO2)completely hides the surface
  and traps the heat.
• 92x greater pressure than Earth (same as deep
  ocean)
• More than 20 space probes from USA USSR

6
Earth

• Earth is the fifth largest planet and the third
  from the sun.
• Composed of Iron Nickel
• Liquid covers 71 percent of the Earths surface.
• The Earth has one moon.
• Atmosphere is primarily nitrogen oxygen
• 12,756 km in diameter
• Average temp of 61F or 16C

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Moon
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Mars

• Mars looks red because it has iron oxide (rust)
• Mars has a thin atmosphere that contains mostly
  carbon dioxide.
• Mars is .107 x size of Earth
• Average temp is -86 to 25C
• 16 space probes

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Moons of Mars

• Phobos
• Deimos

Moons of Mars