Terrestrial Planets and Their Characteristics

The video introduces the terrestrial planets: Mercury, Venus, Earth, and Mars, highlighting their rocky nature and proximity to the Sun. It explains their distances in astronomical units and provides a scale model using a football field. The video compares the sizes of these planets and discusses their moons, noting that only Earth and Mars have moons. It covers the atmospheric compositions of Venus, Earth, and Mars, and details their rotation periods. The video concludes with an invitation to explore more resources.

What are terrestrial planets primarily composed of?

• Iron core and silicate mantle

• Ice and water

• Gas and dust

• Hydrogen and helium

Which planet is closest to the Sun?

• Mars

• Earth

• Venus

• Mercury

How far is Earth from the Sun in astronomical units?

• 0.7 AU

• 0.4 AU

• 1.5 AU

• 1 AU

Which terrestrial planet is the smallest?

• Mars

• Venus

• Earth

• Mercury

How many moons does Mars have?

• Three

• Two

• One

• None

Which terrestrial planet has a thick atmosphere primarily composed of carbon dioxide?

• Mars

• Mercury

• Earth

• Venus

What is the main component of Mars' thin atmosphere?

• Nitrogen

• Hydrogen

• Carbon dioxide

• Oxygen

Which planet rotates the slowest on its axis?

• Venus

• Mars

• Mercury

• Earth

How long does it take for Mercury to complete one orbit around the Sun?

• 88 days

• 365 days

• 687 days

• 225 days

Which two planets take about 24 hours to rotate on their axis?

• Mercury and Venus

• Earth and Mars

• Earth and Mercury

• Venus and Mars