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vocabulary words
| Question | Answer |
|---|---|
| atmosphere | layer of gases surrounding Earth |
| erosion | destructive process that moves materials away |
| mantle | thickest layer made of flexible rock moves slowly in currents |
| biosphere | layer that supports all living things |
| hydrosphere | layer of water on/in crust & lower atmosphere |
| moho | dividing line between crust and athenosphere |
| crust | outermost and thinnest earth layer molted and melted liquid mostly iron |
| inner core | layer made made of solid iron |
| outer core | layer mostly iron so hot its liquid solid very hot with extream pressure |
| deposition | constructive process that places materials in a new place |
| lithosphere | scientists group the crust and moho together in this layer crust and mono |
| weathering | slow destructive process that breaks rocks smaller |
| volcano fact 1 | forms near colliding plate boundaries on land or the ocean floor |
| volcano fact 2 | magma pushes up |
| volcano fact 3 | over time islands & mountains form from lava flowing out & down |
| earthquake fact 1 | occurs along "faults" cracks in crust usually along plate boundaries |
| earthquake fact 2 | pressure beneath crust causes movement along faults |
| earthquake fact 3 | movement causes vibrations felt as a quake |
| earthquake fact 4 | faults may pull apart or push together or slide/grind past eachother |
| mechanical weathering | 1) pressure changes causes rocks to crack and break off 2) ice wedging water freezes in cracks expands 3) plant roots grow into cracks & very slowly pushes rock apart 4) gravity pulls on cracked rock until it breaks off and falls downhill |
| chemical weathering | 1) fungi & other organisms give off chemicals that slowly change some rock 2)raindrops absorb carbon dioxide which forms a weak acid & dissolves rocks over time |
| forms of erosion | landslides, rivers, rainwater, glaciers, and waves |
| erosion caused by gravity | 1) glacier-move down hill in a valley grinding up rocks & pushing sediments away 2) landslides - rocks & soil are quickly pulled downhill 3) rivers-flow downhill & carry sediments which erode river banks 4) rainwater-flows downhill carrying soil & sedm |
| organic layer | sometimes called litter layer |
| top soil | mostly decomposed organic matter-called humus |
| subsoil | chunks of rock and sediments composed of iron clay aluminum only a little organic matter lighter color |
| regolith & bedrock | regolith = top port composed of broken rock bedrock |
| soil timeline | broken down by weathering, transported and broken smaller by erosion, becomes particles called sediments, add organic matter, add water, add air, becomes rich soil |
| rock cycle (Mrs. Bendzick) | igneous, sediments, sedimentary, metimorfic, magma |