Plate Tectonics

Convection Current

Core

Mantle

Crust

Continental Drift

What is some evidence for the Continental Drift Theory?

Mid-ocean ridge

Sea-floor spreading

Subduction Zone

How are mountain ranges created?

Earthquakes

How are islands formed?

Folding & Faulting

Relative Time Scales

Absolute Dating

Some rocks contain elements with unstable isotopes that decay slowly over time. They will decay into a different element that is stable. This change occurs at a rate called a ____ ____- amount of time required for half a sample of the radio active isotope to decay

Big Bang Theory

Red Shift

How does a star form?

Nebula

Geocentric Theory

Heliocentric Theory

Cyanobacteria

How can you learn about the history of the Earth?