3rd Grade Rocks, Minerals & Soil VOCAB
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Created by:
SchneidermanKIds on November 21, 2011
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13 terms
Terms | Definitions |
|---|---|
 Rock | a solid material made up of one or more minerals |
| Mineral | A solid object that is formed in nature and has never been alive |
| Geologist | a scientist who studies the earth and its layers of soil, rocks & minerals |
| Sedimentary Rock | Rocks that form from materials that settle into layers and harden over time |
| Metamorphic Rock | Rock that has been changed by heat and pressure |
| Igneous Rock | Rocks that were once melted rock but have cooled and hardened |
| Topsoil | The top layer of soil; has the smallest grains and most humus |
| Clay | Type of soil made from small grains that hold together well |
| Loam | Type of topsoil rich in minerals and humus |
| Sand | Loose grains of worn rock |
| Humus | Part of the soil that is made of decayed parts of once living things |
| Erosion | The movement of weathered rock and soil. This can be caused by water, wind or ice |
| Weathering | Process in which rocks and (other landforms on Earth's surface) are worn and broken apart |
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