A
Which system of the Earth includes all living things?
Biosphere
What is the main component of the Hydrosphere?
Water
Which layer of the Earth is the thinnest?
Crust
What is the outermost layer of the Earth?
Crust
What are the four main systems of the Earth?
Atmosphere, Biosphere, Lithosphere, Hydrosphere
Which Earth system includes the air we breathe?
Atmosphere
What are the layers of the Earth?
Crust, Mantle, Outer Core, and Inner Core
What is the layer beneath the Earth's crust called?
Mantle