Inner planets

Which planet is about one-third the size of Earth and has a surface similar to the Moon?

• Venus

• Mars

• Mercury

• Earth

What is the main component of Venus's atmosphere?

• Nitrogen

• Carbon Dioxide

• Oxygen

• Hydrogen

What recent discovery in Venus's atmosphere has led scientists to reconsider the possibility of life there?

• Phosphine

• Methane

• Ozone

• Water Vapor

What percentage of Earth's atmosphere is composed of nitrogen?

• 1%

• 96%

• 21%

• 78%

What is the primary reason for the reddish color of Mars's surface?

• Carbon Dioxide

• Volcanic Activity

• Iron Rusting

• Dust Storms