Page 207 - Science Course 3 (Book 2)

Mo13-L2b: What Makes Up the Atmosphere of Inner Planets?

Mass : 641 x 10^24 kg (0.107 x Earth)

Atmosphere
Equatorial Diameter: 6,805 km
Polar Diameter: 6,775 km
78% Nitrogen Moon size Equatorial Circumference: 21,297 km
21% Oxygen compared to Earth
70 kg : Your weight on Mars is 26.3 kg

Mars

Mars is the fourth planet from the Sun and is about
half the size of Earth.
Atmosphere

95.32% Carbon Dioxide
2.7% Nitrogen
1.6% Argon
0.13% Oxygen Mars size
0.08% Carbon Monoxide compared to Earth

SUMMARY

What Makes Up the Atmosphere of Inner Planets?

The greenhouse effect greatly increases the
surface temperature of Venus.

Mars 20 0C
Distance from Sun:
1.52 AU(228000,000 km)
Length of Day:
24.6 Earth Hours
Length of Year:
687 Earth days
Type: –153 0C
Terrestrial
2 Moons 0 Rings Surface
Temperature

Images of Mars show features that might have been
made by water, though no evidence of liquid water or
life has been found.

The atmosphere of Mars is thin and made of about
95 percent carbon dioxide.

Temperatures on Mars range from about –125°C
at the poles to about 20°C at the equator during the
summer.

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