Planetary Atmosphere | MCQs

Explanation

Venus has a thick atmosphere primarily composed of carbon dioxide, with clouds of sulfuric acid

• Venus is the brightest planet.
• It has an atmosphere but no moons.
• It's identical in size, chemistry and gravity.
• It has volcanoes, mountains and sand.
• It's also called Sister Planet of the Earth.

Explanation

Earth, Mars, and Pluto have atmospheres that contain Nitrogen gas.

• Earth: ~78% nitrogen
• Mars: ~2.6% nitrogen
• Pluto: thin atmosphere with nitrogen ice and gas

Neptune's atmosphere is mostly hydrogen, helium, and methane, not nitrogen.

Explanation

The atmosphere of Mars has an abundant supply of carbon dioxide.

It comprising about 95% of its atmosphere.

This high concentration of CO2 contributes to the planet's cold temperatures and thin atmosphere.