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EarthScience 6
| Question | Answer |
|---|---|
| What Is weathering and erosion? | weathering is the process that breaks down rock and other substances at Earths surface. Erosion is the removal of rock particles by wind water ice or gravity. |
| what is uniformitarianism? | a principal that states that the same process that operate today operated in the past. |
| what is mechanical weathering? | is the type of weathering in which rock is physically broken into smaller pieces. |
| what is ice wedging? | wedges of ice in rocks widen and deepen water seeps deeper into the cracks. |
| what is abrasion? | refers to the grinding away of rock by rock particles carried by water, ice, wind, or gravity. |
| what is chemical weathering? | is the process that break down rock through chemical changes. |
| what is oxidation? | Iron combines with oxygen in the presence of water in a process. |
| what is permeable? | means that a material is full of tiny, connected air spaces that allow water to seep through it. |
| what is bedrock? | is the solid layer of rock beneath the soil. |
| what is soil? | is the loose, weathered material on earth´s surface in which plants can grow. |
| what is humus? | is a dark-colored substance that forms as plant and animal remains decay. |
| what is fertility? | soil is a measure of how well the soil supports plant growth. |
| what is loam? | soil that is made up of about equal parts of clay, sand, and silt. |
| what is soil horizon? | is a layer of soil that differs in color and texture from the layers above or below it. |
| what is topsoil? | a crumbly dark brown soil this is a mixture of humus, clay, and other minerals. |
| what is subsoil? | usually consists of clay and other particles washed down from the A horizon ,but little humus. |
| what is litter? | when plants die, their remains fall to the ground and become part of the litter. |
| what are decomposers? | are the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals. |
| what is sod? | the thick mass of tough roots at the surface of the soil. |
| what is a natural resource? | is anything in the environment that humans use. |
| what is a Dust Bowl? | the erosion was most serious in the Southern Plains states. |
| what is soil conservation? | is the management of soil to prevent its destruction. |
| what is contour plowing? | farmers plow their fields along the curves. |
| what is conservation plowing? | farmers disturb the soil and its plant cover as little as possible |
| what is crop rotation? | a farmer plants different crops in a field each year. |
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lb0911
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