land soils fossils
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| bedrock | unweathered rock that lies below the subsoil; some material in the soil may have come from the bedrock
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| delta | a large mass of sediment deposited at the mouth of a river
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| deposition | the dropping of sediment by wind, water, ice or gravity
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| erosion | the movement of weathered rock material from one place to another
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| fossil | the remains of a plant or animal that lived long ago and is preserved in some way
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| glacier | a large mass of slow moving ice that flows down a slope
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| humus | the decayed remains of plants and animals
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| paleontologist | a scientist who studies fossils and organisms that lived long ago
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| soil | bits of rock, minerals, and material that were once part of once living things
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| subsoil | the bottom layer of soil, it contains small pieces of rock and very little humus. The soil particles are larger and lighter in color than topsoil
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| topsoil | the uppermost level of the soil, best soil to grow plants because it contains a large amount of humus which provides nutrients needed for plants to grow properly. The particles are dark and small.
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| weathering | the slow breaking apart or wearing away of rock into smaller pieces
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