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Published byIrma Robinson Modified over 9 years ago
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Good Morning! Tuesday, 11/10 As you come in, please take out your Mechanical Weathering Lab
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Mechanical Weathering Which rock type was the most affected? How can you tell? If your rocks lost mass, what happened to the lost mass? Erlenmeyer flasks What will this lost mass become?
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Chemical Weathering How is chemical weathering different from mechanical weathering? Look at material list (similar to last lab) 2 Days! We will be completing Day 1 today Finishing the lab on Friday
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SOILS HAVE LAYERS CALLED “HORIZONS” O HORIZON – LOOSE AND PARTLY DECAYED ORGANIC MATTER Organic material is made up of living plants & animals, dead plants & organisms, and nutrients that have come from decomposed plants & animals A HORIZON – MINERAL MATTER MIXED WITH HUMUS B HORIZON – FINE CLAY PARTICLES C HORIZON – PARTIALLY DECOMPOSED PIECES OF PARENT ROCK FURTHER BELOW: UNWEATHERED PARENT ROCK SOIL HORIZONS
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DRAW THE HORIZON LAYERS OF SOIL AND LABEL THE CHARACTERISTICS OF EACH HORIZON SOIL HORIZONS
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LIVING WORMS & BACTERIA FEED ON DEAD ORGANISMS, MAKING THEM PART OF THE SOIL HUMUS = DECAYED ORGANIC MATTER HELPS KEEP SOIL MOIST BY SOAKING UP RAINWATER REMOVES CHEMICALS AS RAIN SEEPS THROUGH ROOTS CAN THEN ABSORB THESE NUTRIENTS SOIL IS HOME FOR MANY LIVING ORGANISMS Ants, beetles, grubs, spiders, mites, snails, worms, mice, shrews THESE ANIMALS BURROW & TUNNEL MIXING AND BREAKING SOIL INTO TINY FRAGMENTS PRODUCTION OF FERTILE SOIL
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Soil Layers Soil type 1-5 Highlight descriptive words of your soil type
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