atmosphere

lithosphere

the crust

people build homes and cities on this layer

Earth's lithosphere contains

the center layer of the earth

core

mantle

What did early geographers notice in the 1500s?

plate tectonics theory

how continents move

Plate movement causes what?

weathering

When does water cause physical weathering?

hypothesis

scientific theory

igneous rock

metamorphic rock

sedimentary rock

sand

delta

fossil

the rock cycle

erosion

4 spheres

Pangea