How many planets are there within our solar system?

• 6

• 7

• 8

• 9

Which of the following planets is closest to the sun?

• Earth

• Mars

• Venus

• Mercury

What are the inner planets of our solar system known as?

• Gas giants

• Terrestrial planets

• Ice giants

• Dwarf planets

Why can the term 'terrestrial' be misleading when referring to the inner planets?

• Because they all have the same environment

• Because they are not solid

• Because they have vastly different environments

• Because they are all the same size

Which inner planet does not have any moons?

• Earth

• Mars

• Mercury

• Venus

How many moons does Mars have?

• None

• One

• Two

• Three

What primarily makes up the outer cores of the inner planets?

• Ice and water

• Heavy metals such as iron and nickel

• Liquid hydrogen and helium

• Rock and carbon compounds

What has caused the atmosphere of each terrestrial planet to change over time?

• Meteor impacts

• Solar winds

• Sunlight producing chemical reactions

• Gravitational forces from other planets

What is the primary composition of the atmosphere on Venus?

• Oxygen and Nitrogen

• Hydrogen and Helium

• Carbon Dioxide

• Methane

What is the surface temperature of Venus approximately?

• 15 degrees Celsius

• 100 degrees Celsius

• 465 degrees Celsius

• 0 degrees Celsius