Unit 1:Earth’s Geosphere

The goal of this unit is to help students understand how Earth’s crust has changed over time and its impact on Earth’s other systems. Students will begin by learning about the two types of crust and combine that understanding with the theory of plate tectonics. Learners will use that knowledge to evaluate the change in continents and determine the age of crustal rocks. After determining the age of rocks, students will learn about the interactions between continental and oceanic crusts and describe how those interactions have changed Earth throughout its history. Students will bring everything together to explain how the movement of Earth’s crust affects the rest of the planet.