True or False: The Earth’s surface has stayed the same for thousands of years.
The Earth’s surface is always changing! True or False: The Earth’s surface has stayed the same for thousands of years False The Earth’s surface is always changing!
Still the same rock…
Still the same rock…
Still the same rock…
Still the same rock…but where did it go?
HOW DID THIS HAPPEN??
The process that breaks rocks down into smaller pieces Weathering The process that breaks rocks down into smaller pieces
What causes weathering?
Water causes weathering What evidence of weathering do you see in this picture?
Wind causes weathering Why wasn’t this mass of land weathered away? What evidence of weathering do you see in this picture?
Ice causes weathering (ice wedging) How is ice causing weathering?
Plants and animals cause weathering What are they doing to the rock?
Oxygen causes weathering Why did the bike rust?
Two Types of Weathering Mechanical (Physical) Weathering The rock is broken up, but it is the same rock in smaller pieces Example: wind, water, plant roots, and ice Chemical Weathering The rock is broken up and changed by chemical reactions Example: oxidation (RUST!), acid rain
Mechanical or Chemical?
Mechanical or Chemical?
Mechanical or Chemical?
Check this out! This website lets you choose which type of weathering acts on a certain place. Go! Weathering is like baking! Factors that Cause Weathering