Solar System Review #2

The most plentiful chemical elements found in the Sun and the gas giants are...

• hydrogen and helium
• nitrogen and oxygen
• carbon dioxide and nitrogen
• hydrogen and methane

Which two terrestrial planets have atmospheres dominated by carbon dioxide CO₂?

• Mercury and Earth
• Mercury and Mars
• Venus and Mars
• Venus and Earth

Among the terrestrial planets, Earth's atmosphere is exceptional because...

• it contains low amounts of nitrogen N₂.

• it has a high % of argon Ar.

• it has a high % of oxygen

• it has a large % (>10%) of greenhouse gases.

The planet with practically no atmosphere at all is _________________.

• Mars
• Mercury
• neither one

What gas makes up the majority of the Earth's modern atmosphere?

• oxygen

• nitrogen

• water vapor

• carbon dioxide

The moon Enceladus orbits which planet?

• Jupiter

• Saturn

• Uranus

• Neptune

Which moon pictured here belongs to Earth and is unique because it is the only one mankind has walked on?

• Moon

• Phobos

• Charon

• Titan

The moon Phobos orbits which planet?

• Earth

• Mars

• Mercury

• Saturn

The moon Titan belongs orbits which planet?

• Neptune

• Jupiter

• Uranus

• Saturn

Which moon pictured here belongs to Neptune and is unique because of it's retrograde orbit?

• Phobos

• Mimas

• Titan

• Triton