What is a Planet?

Which of the following is NOT a condition for planethood?

• A planet must have an atmosphere

• A planet must be large enough to be spherical

• A planet must have an orbit free of other small objects

• A planet must orbit the sun

Which planet was reclassified as a 'dwarf planet' in 2006?

• Neptune

• Jupiter

• Pluto

• Mars

How many planets are there in our solar system?

• Seven

• Eight

• Nine

• Ten

Which planet is closest to the Sun?

• Earth

• Mars

• Venus

• Mercury

Which of the following planets is a gas giant?

• Mercury

• Venus

• Mars

• Jupiter

Which planet is known as the 'Red Planet'?

• Jupiter

• Venus

• Mars

• Earth

What does the word 'planetes' mean in Greek?

• Sky

• Light

• Wanderer

• Star

Which planet is the largest in our solar system?

• Neptune

• Jupiter

• Saturn

• Earth