APES Warm-Up (11/18) 1.What are three things you already know about farming? 2.What does sustainability mean to you? 3.What are 3 ways we could make farming.

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Presentation transcript:

APES Warm-Up (11/18) 1.What are three things you already know about farming? 2.What does sustainability mean to you? 3.What are 3 ways we could make farming more sustainable?

Weathering Slides AP Environmental Science

Weathering – processes that break down rocks, turning large particles into smaller particles Three main types: – A. physical (mechanical) weathering – B. chemical weathering – C. biological weathering

Mechanical Weathering: no change in chemical composition--just disintegration into smaller pieces

Chemical Weathering: breakdown as a result of chemical reactions CaCO 3 +CO 2 +H 2 O ---> Ca HCO 3-

Shattered rocks are common in cold and alpine environments where repeated freeze-thaw cycles gradually pry rocks apart.

Holes created as a result of chemical weathering

Biological Weathering Can be both chemical and mechanical in nature. roots split rocks apart lichens produce acids that dissolve rocks. burrowing animals