Earth's Subsystems

What are the four main interconnected systems of Earth?

• Atmosphere, Hydrosphere, Geosphere, Biosphere

• Atmosphere, Lithosphere, Hydrosphere, Biosphere

• Air, Water, Land, Life

• Crust, Mantle, Core, Atmosphere

Which gas makes up the largest percentage of Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Argon

What percentage of Earth's surface is covered by water, including both liquid and solid forms?

• 50%

• 65%

• 71%

• 80%

What does the term "biosphere" refer to?

• The solid outer layer of Earth.

• All the water on Earth.

• The thin layer of gases surrounding Earth.

• All life on Earth.

What causes the lithosphere to constantly change?

• Ocean currents

• Wind erosion

• Shifts in tectonic plates

• Changes in atmospheric pressure