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MEMORY STRATEGIES WHAT IS SOIL MADE FROM? SOIL-A WORM lives in soil. A=air W=water O=organic matter R=rock M=matter HOW IS SOIL MADE? Wweathering Oorganic.

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Presentation on theme: "MEMORY STRATEGIES WHAT IS SOIL MADE FROM? SOIL-A WORM lives in soil. A=air W=water O=organic matter R=rock M=matter HOW IS SOIL MADE? Wweathering Oorganic."— Presentation transcript:

1 MEMORY STRATEGIES WHAT IS SOIL MADE FROM? SOIL-A WORM lives in soil. A=air W=water O=organic matter R=rock M=matter HOW IS SOIL MADE? Wweathering Oorganic decomposition Rroto tilling by burrowing animals Mmaterial that is organic decays to make dark hummus

2 HO THE RISING LAYERS OF SOIL PROFILE YOUR GOOD SIDE FOR A PICTURE A HO THE RISING LAYERS FROM HORIZON A HUMMUS HORIZON B LEACHED MATERIAL VERY LITTLE HUMMUS HORIZON C THE WEATHERED PARENT ROCK NO HUMMUS A’s are always on top and who wouldn’t be humming with A’s (humming = hummus) B’s might need to leach a bit in life but still hum a little, too C’s are on the bottom and may have to live with parents who rock a bit longer so no humming

3 Characteristics of soil Texture determined by amounts in composition sandSiltclay pHAcidic lower pHBasic pH higher pHNeutral pH = 7 Pore spaceSand has larger pore size between particles Silt has less pore space than sand but more the clay Clay has the least pore space colorDetermined by minerals Fertility of soil (ability to grow plants) Climate, topography, amount of humus, minerals, and nutrients.

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5 WHAT IS SOIL MADE FROM? SOIL-A WORM lives in soil. A=air W=water O=organic matter R=rock M=matter Fertility of soil (ability to grow plants) Climate, topography, amount of humus, minerals, and nutrients.

6 Wweathering Oorganic decomposition Rroto tilling by burrowing animals Mmaterial that is organic decays to make dark hummus

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8 C B A A lab/KFW_2nd_Grade_Links_Soil.html e.aspx

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13 Type of Rock Weathering Rate Temperature /water & soil formation rate Topography (slope & erosion) and soil formation rate Biotic level and soil formation rate Metamorphic slowest Coldest dryest slowest Steep slope Fastest erosion slowest Little life of 5 kingdoms slowest IgneousWarm wet medium Medium slope medium erosion Some life of 5 kingdoms Medium Sedimentary fastest Hot and wettest Fastest Flat area Slowest erosion fastest Many and differing life forms fastest

14 Flat Warm Wetter Biotic organisms plentiful Flat Warm Wetter Biotic organisms plentiful Sloped Colder Dryer Biotic organisms insufficient Sloped Colder Dryer Biotic organisms insufficient

15 A’s are on top and humming B’s leach a bit C’s stay with rocking parents C horizon locationbioticsother ATop (top soil) All forms including decomposers Most eroded, most developed, BMiddleAll forms Has some humus Rain turns it Reddish from leached minerals of A horizon seeping down to B horizon CbottomNo humusLarger parts of Parent rock just beneath C level

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17 coarse Sticky when wet smooth

18 Tropical soil Desert Soil Temperate Soil Artic Warm and wet so a lot of erosion and leeching Hot Dry so low biotics and little erosion Moderate temp and rainfall so moderate erosion Cold dry low biotics and little erosion Thin humus Little organic Rich humusPoorly develo ped A,B,C Fast soilSlow soil Moderat soil good for growing A lot of rocks

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21 Humus layer Horizon A Connected pore spaces, Very fertile Humus layer Horizon A Connected pore spaces, Very fertile Smooth sticky Clay, gray means a lot of rain Smooth sticky Clay, gray means a lot of rain

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