STUDY GUIDE FOR EARTH QUIZ
 Be able to label the four layers of the Earth.
Size


About 4 times the diameter of the moon (8,000 miles across)
Much smaller than the sun
Position
 3rd planet from the sun; one of the four rocky inner planets
 One of eight total planets that revolve around the sun and comprise the solar system
 About 150 million kilometers from the sun
Unique Properties
 Axial Tilt: As the Earth revolves around the sun, the axial tilt of Earth causes the seasons
 Ability to support life because of its water and oxygen
Motion
 Rotation: Earth spinning on its axis: 1 rotation = 24 hours
 Revolution: Earth orbiting around the sun; 1 revolution = 365 days
Structure
 Geologically active and the surface is constantly changing
 Has a lot of water and oxygen to support life; about 70% of the earth is covered with water
 Has a protective atmosphere that blocks out most of the sun’s harmful rays
 4 Layers: Crust, Mantle, Outer Core, Inner Core
STUDY GUIDE FOR EARTH QUIZ
 Be able to label the four layers of the Earth.
Size


About 4 times the diameter of the moon (8,000 miles across)
Much smaller than the sun
Position
 3rd planet from the sun; one of the four rocky inner planets
 One of eight total planets that revolve around the sun and comprise the solar system
 About 150 million kilometers from the sun
Unique Properties
 Axial Tilt: As the Earth revolves around the sun, the axial tilt of Earth causes the seasons
 Ability to support life because of its water and oxygen
Motion
 Rotation: Earth spinning on its axis: 1 rotation = 24 hours
 Revolution: Earth orbiting around the sun; 1 revolution = 365 days
Structure
 Geologically active and the surface is constantly changing
 Has a lot of water and oxygen to support life; about 70% of the earth is covered with water
 Has a protective atmosphere that blocks out most of the sun’s harmful rays
 4 Layers: Crust, Mantle, Outer Core, Inner Core