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Solar System Review
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• Mercury has cratered highlands, much like the moon, and vast smooth terrains that resemble maria.

• Mercury has the greatest temperature extremes of any planet.

 Surface Features

 Surface Temperatures

Slide 14

Mercury’s Surface

Mercury’s Surface

Slide 15

23.2 The Terrestrial Planets

23.2 The Terrestrial Planets

• The surface temperature of Venus reaches 475oC, and its atmosphere is 97 percent carbon dioxide.

 Surface Temperatures

Slide 16

23.2 The Terrestrial Planets

23.2 The Terrestrial Planets

 Venus is similar to Earth in size, density, mass, and location in the solar system. Thus, it has been referred to as “Earth’s twin.”

• Venus is covered in thick clouds that visible light cannot penetrate.

 Surface Features

• About 80 percent of Venus’s surface consists of plains covered by volcanic flow.

Slide 17

Venus

Venus

Slide 18

23.2 The Terrestrial Planets

23.2 The Terrestrial Planets

 The Martian Atmosphere

• The Martian atmosphere has only 1 percent of the density of Earth’s.

 Surface Features

• Most Martian surface features are old by Earth standards. The highly cratered southern hemisphere is probably 3.5 billion to 4.5 billion years old.

• Although the atmosphere of Mars is very thin, extensive dust storms occur and may cause the color changes observed from Earth.

Slide 19

Mars

Mars

Slide 20

23.2 The Terrestrial Planets

23.2 The Terrestrial Planets

 Water on Mars

• Some areas of Mars exhibit drainage patterns similar to those created by streams on Earth.

• Images from the Mars Global Surveyor indicate that groundwater has recently migrated to the surface.

Slide 21

Water on Mars

Water on Mars

Slide 22

23.3 The Outer Planets

23.3 The Outer Planets

 Jupiter has a mass that is 2 1/2 times greater than the mass of all the other planets and moons combined.

• Jupiter’s hydrogen-helium atmosphere also contains small amounts of methane, ammonia, water, and sulfur compounds.

 Structure of Jupiter

Slide 23

Jupiter and the Great Red Spot

Jupiter and the Great Red Spot

Slide 24

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