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Ch. 29 Sec. 2 Terrestial Planets. First four  Mercury, Venus, Earth, Mars  Solid, Rocky surfaces.

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Presentation on theme: "Ch. 29 Sec. 2 Terrestial Planets. First four  Mercury, Venus, Earth, Mars  Solid, Rocky surfaces."— Presentation transcript:

1 Ch. 29 Sec. 2 Terrestial Planets

2 First four  Mercury, Venus, Earth, Mars  Solid, Rocky surfaces

3 Mercury Closest Planet- 1/3 size of Earth Slow spin of hrs  In two Mercury Years, three days have passed Atmosphere of oxygen and sodium  427 o C day temp & -173 o C night temp Based on radio observations Crater terrain formed from lava flow

4 Mercury

5 Venus No moons and is the brightest planet  Albedo is.75 One day is 243 Earth days in length  Clock wise spin – rise in west and sets in east  Retrograde rotation High density and mass CO 2 and Nitrogen  Cloud cover and high greenhouse gases: from density  Hottest planet – 464 o C

6 Venus

7 Earth Water exsits in three states  Solid, Liquid, Gas  78% N and 21% O2 Precission  Earth axis wobbles: due to moon gravitational pull  26,000 yrs for one cycle  Points towards Vega

8 Earth

9 Mars Red Planet  Soil red due to high iron content Composition of CO 2 and N but low density  Low density constitutes low greenhouse effect Surface features  Shield volcanoes: Olympus Mons: wide as Colorado and 3x higher than Everest  Dried river beds and runoff channels: suggests liquid water  “Dry Ice” polar Ice caps

10 Mars


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