Compared to the terrestrial planets of the inner Solar System, the gas giants contain mainly ____________ gases in their atmospheres.

• heavier gases (Oxygen and Carbon Dioxide)

• lighter gases (Hydrogen and Helium)

• inert gases (not chemically active)

• reactive gases

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

• Venus and Earth

• Mercury and Mars

• Venus and Mars

• Venus and Mercury

Tags

NGSS.MS-PS1-1

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 and a low % of carbon dioxide.

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

The planet with practically no atmosphere at all is _________________.

• Mars
• Mercury
• neither one

The gas giants are different from the terrestrial planets because they

• have smaller atmospheres

• are more dense

• have larger atmospheres

• are more colorful

Which planet is the hottest due to the greenhouse effect from mostly Carbon Dioxide?

• Mercury

• Venus

• Earth

• Neptune

What protects Earth from ultraviolet rays from the sun?

• ozone layer

• mesosphere

• air pressure

• troposphere

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

• oxygen

• nitrogen

• water vapor

• carbon dioxide

what is the atmosphere of Uranus made of (choose 3) mostly

• nitrogen

• hydrogen

• methane

• helium

What enables any atmosphere stay in place around the planet?

• gravity

• air pressure

• types of air molecules

• solar wind

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4