Earth

What makes Earth unique among the known planets in our solar system?

• It is the largest planet.

• It has a ring system.

• It supports life.

• It is the third planet from the Sun.

Approximately how old is Planet Earth?

• 1 billion years old

• 2.5 billion years old

• 4.5 billion years old

• 6 billion years old

What is Earth's position in the solar system relative to the Sun?

• Second planet

• Third planet

• Fourth planet

• Fifth planet

Which two planets are Earth's immediate neighbors in the solar system?

• Mercury and Jupiter

• Venus and Mars

• Saturn and Uranus

• Neptune and Pluto

Are you enjoying the video lesson?

• Yes

• No

How many Mars-sized planets can fit inside Earth by volume?

• About 1.9

• About 7

• About 11

• About 63

What type of planet is Earth?

• Gas giant

• Ice giant

• Terrestrial planet

• Dwarf planet

Which of the following is NOT one of Earth's four main layers?

• Inner Core

• Outer Core

• Exosphere

• Mantle

What percentage of Earth's atmosphere is composed of Nitrogen?

• 21%

• 1%

• 78%

• 50%