Old rocks on Earth's surface are gradually reduced to tiny pieces, or sediments, by erosion caused by water, wind, or glacial ice. Sedimentary rock is formed when those small pieces of rock are compressed into larger rock formations.
Erosion breaks the rock down again, and the cycle continues.
Materials Procedures Adaptations Discussion Questions Extensions Evaluation Suggested Readings Links Vocabulary Academic Standards Credit Printable version of the lesson plan in rich text format. Use our Teaching Tools to create custom worksheets, puzzles and quizzes about this topic. Back to Top 1. Tell them that they are going to write children's stories to explain to younger students how sedimentary rock is formed. Suggest they create characters that are tiny pieces of rock or grains of sand.