Page 205 - Science Course 3 (Book 2)

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

What Makes Up the Atmosphere of Venus 462 0C
Mo13–L2b
Inner Planets? Distance from Sun:
0.72 AU(108,000,000 km)
KEY CONCEPTS: Length of Day:
1. Why is Venus hotter than Mercury?
2. What kind of atmospheres do the inner planets 177 Earth days
have? Length of Year:
225 Earth days
Type: –173 0C
Terrestrial
Vocabulary A-Z 0 Moon 0 Rings Surface
Let us learn some vocabulary Temperature

greenhouse effect The atmosphere of Venus is about 97 percent
carbon dioxide.
is when a planet’s atmosphere traps solar energy
and causes the surface temperature to increase. The pressure of Venus’s dense atmosphere is 90
times greater than that of Earth’s atmosphere.

A thick layer of acid clouds covers Venus.

Mass : 4,867,320,000,000,000 billion kg
(0.815 x Earth)

Equatorial Diameter: 12,104 km
Polar Diameter: 12,104 km
Equatorial Circumference: 38,025 km

70 kg : Your weight in Venus is 63.4 kg
Let’s Begin

Venus
Atmosphere
Venus is the second planet from the Sun and is
about the same size as Earth.
95.6% Carbon dioxide Venus size
3.5% Nitrogen compared to Earth

The greenhouse effect occurs when a planet’s at-
mosphere traps solar energy and causes the surface
temperature to increase.

Because of its greenhouse effect, Venus is the
hottest planet in the solar system, with an average
temperature of about 460°C.

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