Copy 43.Warm Up 44. SSR Weather handout 45. Weathering Notes

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Presentation transcript:

Copy 43.Warm Up 44. SSR Weather handout 45. Weathering Notes 46-47. Age of the Earth Notes 48-49. Positioning 50. Word Bank Laws and Principles 51. Geological Time

Weathering pg 45

Weathering of rocks (rocks break into smaller rocks) Mechanical: Stress that keeps rock’s chemical structure as it breaks down.(Wind, freezing, abrasion, animals, plant growth) Chemical: Stress that causes a chemical change to rocks. (Water dissolving, rust, acids, pollution)

Benefits of weathering Soil horizons Soil: minerals get crushed down into basic minerals (smaller rocks we use for nutrition) Horizons: As rocks decompose on top of each other it forms other soil layers Horizons have different textures depending on type of minerals and layer

Class Website: assignments: who dunnit Complete who dunnit