EARTH

• hydrologic cycle
• a functioning carbon cycle is vital for life
• life depends on the hydrologic cycle
• Gases in Earth's atmosphere greatly influence Earth's temperature.
• Greenhouse gases

EARTH PT 2

• absorb counter radiation and emit it back towards the Earth
• Earth's average temperature would be approximately -18°C

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MARS

• Carbon dioxide: 95.32 percent
• Nitrogen: 2.7 percent
• Argon: 1.6 percent
• Oxygen: 0.13 percent
• Carbon monoxide: 0.08 percent

MARS PT 2

• minor amounts of: water, nitrogen oxide, neon, hydrogen-deuterium-oxygen, krypton and xenon
• atmosphere is 100 times thinner than Earth's. But is still thick enough to support Weather, wind, and clouds
• Average temp is around minus 80 degrees F
• It can vary from minus 195 degrees F near the poles during winter
• 70 degrees F at midday near the equator

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VENUS

• Carbon dioxide: 96.5%
• Nitrogen: 3.5%
• Sulfur dioxide: 150 ppm
• Argon: 70 ppm
• Water vapour: 20 ppm

VENUS PT 2

• Carbon monoxide: 17 ppm
• Helium: 12 ppm
• Neon: 7 ppm
• Hydrogen fluoride: 0.001–0.005 ppm
• Hydrogen chloride: 0.1–0.6 ppm

VENUS PT3

• Temperature at the surface is 740 K (467 °C, 872 °F)
• pressure is 93 bar
• opaque clouds made of sulfuric acid
• atmospheric gases are carbon dioxide and nitrogen

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