Unit C: The Changing Earth

Rocky Mountains:  Courtesy Getty Images.	This unit uses diverse Alberta landscapes to present a theory on how Earth was formed over billions of years. You will see that many different environments must have existed over the years to create these diverse landscapes.

Being able to read the past is important to scientists so they can understand how Earth was formed and what changes are still occurring. How do scientists determine how Earth looked millions of years ago? In this unit you will examine a number of formations in Alberta that give clues to the geological history of the province and to all of Earth.

• Read the Unit C introduction on pages 292 and 293 of the textbook.