Impact Cratering and the Age of the Solar System by Cris DeWolf

Project:     NASA Heliophysics Teacher-Developed Lessons

For this lesson, students will gather evidence through a variety of media to support the claim that Earth is 4.6 billion years old, and formed along with the rest of our solar system from material in a nebula. Assessment of learning goals will be based on the student’s CER (Claim-Evidence-Reasoning) essay.