Have you ever wondered how cracks form on the sidewalk? Or have you ever thought about what caused the Grand Canyon to be so big and wide? In this video, you and your kids will learn about weathering, the three types of weathering, and how they affect the earth.
Chemical weathering involves chemical reactions within the minerals inside rocks. Water, acids, and some gases contribute to chemical weathering. Mechanical weathering, or physical weathering, is caused by frost or ice, moving water, or the heat of the sun. The most common type of weathering involves water freezing in cracks in rocks. Speaking of the Grand Canyon, scientists believe it was caused by the Colorado River wearing down the rocks over the course of a long period of time. Biological weathering happens when plants and animals, as well as other living things, cause rocks to be broken into smaller pieces. Tree roots or burrowing animals like rabbits are great examples of why rocks might break as these biological influences affect them over time.
The end of this video contains a short review to test your knowledge. See if you can answer all the questions correctly!
We hope you and your student(s) enjoyed learning about how the earth changes in these different ways! If you want to learn even more, head over to our website and download one of our many free lesson plans about weathering, full of activities, worksheets, and more!
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What you will learn in Weathering for Kids:
0:00 Introduction to weathering and the three types
0:24 What is weathering?
1:16 Chemical weathering
2:06 Mechanical weathering (physical weathering)
3:50 Biological weathering
4:58 Review of the facts
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