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Soil is a mixture of what four materials?
Weathered rock, organic matter, water and air.
What is humus? What color does it make soil?
Decayed Organic matter soil and it makes soil black
What is a soil horizon?
Describe the A horizon
Describe the B horizon
Describe the C horizon
A layer of soil
Upper layer
Lies below Horizon a
Deepest layer of soil
Why does tropical, arctic, desert, and temperate regions have different types of soil?
Not Suitable for growing a lot of crops
Why is tropical soil unsuitable for growing most crops?
Not a lot, the rain washes out the minerals
Describe sediments
Matter that settles at the bottom of a liquid
How are sedimentary rocks formed?
From loose material from other sedimentary rock.
What 2 things does the formation of sedimentary rocks depend on?
Water and Worms
Where are the oldest layers found in sedimentary rocks?
Fossils
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