Inner and Outer Planets

The outer planets have atmospheres composed mostly of

• nitrogen and oxygen.

• hydrogen and helium.

• water vapor and carbon dioxide.

Which of the inner planets has the greatest mass?

• Mercury

• Earth

• Venus

• Mercury

Which two gases make up most of the outer planets?

• ammonia and helium

• ammonia and hydrogen

• hydrogen and helium

• methane and hydrogen

All the inner planets

• have at least one moon.

• have thick atmospheres.

• are rocky and have a solid outer layer.

Which planet has a Great Red Spot and at least 63 moons?

• Saturn

• Jupiter

• Neptune

Why do the inner planets have longer days than the outer planets?

• Inner planets are closer to the sun.

• Outer planets are larger.

• Outer planets are farther from the sun.

• Inner planets are denser & rotate slower.

Why do the outer planets have longer years than the inner planets?

• The outer planets rotate faster than the inner planets.

• The outer planets are farther from the sun.

• The inner planets are denser and rotate slower.

• Outer planets are made of gas.

Tags

NGSS.MS-PS2-4

Why don't the outer planets have a separate atmosphere?

• Because they are so large.

• Because the planet's composition is the same as the atmosphere.

• Because of all the moons revolving around the planets cause the atmosphere to mix with the planet.

• Because they rotate so fast, the atmosphere blends in with the planet.

Which of the following is a characteristic of the inner planets?

• They have thick atmospheres.

• They are primarily composed of gases.

• They have solid, rocky surfaces.

• They have rings.

Which planet is known as the 'Red Planet'?

• Mercury

• Venus

• Earth

• Mars