CH.4 4TH GRADE SCIENCE

VOCABULARY

• Weathering-the breaking down of rocks.
• Physical weathering-happens when such things as rain break down rocks
• Chemical weathering-breaking down minerals then the rocks change chemically.
• Horizon-the layers of soil that form on the ground

MAIN IDEA LESSON 1

• Processes that cause rocks to break down into smaller pieces

LESSON 2 VOCABULARY

• Erosion-the transport of weathered rock
• Deposition-the dropping off of weathered rock

LESSON 2 MAIN IDEA

LESSON 3 MAIN IDEA

BYE