Science CH 4

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Author:
Rayna
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287664
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Science CH 4
Updated:
2014-11-06 15:12:12
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Science
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Science
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Science CH 4, Grade 8 Abeka
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  1. Name f5 types of mass wasting?
    • 1. soil creep
    • 2. avalanche
    • 3. landslide
    • 4. mudflows
    • 5. rockfalls
  2. What is a mudflow?
    • 1. Most fluid and fastest type of mass wasting.
    • 2. Rapid movement of loose soil, saturated with water
  3. What is an avalanche?
    • 1. When ice and snow abruptly dislodge from a mountain face.
    • 2. Sometimes a result of a sharp noise
  4. What is a landslide?
    When a huge amounts of rock or soil suddenly slide down a slope.
  5. What is a rockfall?
    When individual rock fragments break off the side of a cliff because of gradual weathering like exfoliation.
  6. What is the main agent of chemical weathering?
    water
  7. Fan-shaped sediment deposit the mouth of a river into the sea?
    delta
  8. Term for area that separates two river systems?
    drainage divide
  9. Term for one of numerous streams that feeds into a river at various points?
    tributary
  10. Term for a network of underground cavities?
    cave
  11. Term for the sediments carried by a stream?
    load
  12. Term for ridge formed when a river drops sediments along the edge of its channel?
    levee
  13. Term for a large channel in the ground that cannot be repaired by ordinary cultivation?
    gully
  14. Term for one of a series of winding, looping curves in a river?
    meander
  15. Fan-shaped deposit of sediments at the mouth of a dry steam bed in the desert?
    alluvial fan
  16. Term for a region where limestone is exposed and abundant?
    karst
  17. Name two major types of glaciers?
    • 1. continental
    • 2. valley (alpine)
  18. Suspension, saltation, and creep, in which wind transports sediments, are what type of processes?
    aeolian processes
  19. The period of Earth's history which more of the surface was covered by glaciers than at present?
    Ice Age
  20. Term for sharp, steeple-shaped point of a mountain with three or more cirques cut?
    horn
  21. Term for scratches in bedrock that were produced by glaciers?
    striae
  22. Term for how a hill formed when a glacier overruns its old deposits of broken rock?
    drumlin
  23. Term for heap or ridge of till left by a retreating glacier?
    moraine
  24. Term for large hole in the ground left from the melting of a chunk of glacial ice?
    kettle
  25. Term for huge bowl-shaped depression dug out by a valley glacier?
    cirque
  26. Type of weathering involving the breaking or peeling away of rock into layers?
    exfoliation
  27. Term for the feature formed by streams merging and flowing toward the sea as a large river?
    river system
  28. Two general types of weathering?
    • 1. chemical weathering
    • 2. physical weathering
  29. Term for a glacier-carved valley that fills with seawater?
    fjord
  30. Type of weathering that occurs when rainwater soaks into cracks in a rock and freezes, splitting the rock?
    ice wedgin
  31. Which natural acid, found in rainwater and ground water, promotes chemical weathering of rocks?
    carbonic acid
  32. Pillarlike structure of rock formed when the middle of a sea arch collapses?
    sea stack
  33. What is produced when a sea cave is eroded continually?
    sea arch
  34. Term for deposits of clay and silt left by a sandstorm.
    loess
  35. What is the most important effect of wind erosion?
    deflation
  36. Term for Natural processes that break down rocks.
    weathering
  37. Narrow, sandy islands that lie off the coast of the mainland?
    barrier islands
  38. Term for the eroding action of windblown sand?
    abrasion
  39. Large, funnel-shaped depression in the ground caused by cavern collapse?
    sinkhole
  40. Ice sheets smaller than continental glaciers?
    ice caps
  41. Long pile of rocks deposited parallel to the shore to stop erosion?
    breakwater
  42. Spirelike mass of dripstone on the floor of a cave?
    stalagmite
  43. Method of erosion prevention that modifies a smooth slope into a series of level, stairlike steps?
    terracing
  44. Carrying away of rock fragments, such as by wind or running water?
    erosion
  45. Most common rock associated with caverns?
    limestones
  46. Term for particles too heavy to be lifted by wind that are rolled in sort bursts?
    creep
  47. Region of land drained by a stream or river system?
    drainage basin
  48. Curve shaped lake formed when a river is cut off from the rest of the river?
    oxbow lake
  49. Large stream that carries water from the mountains to the sea?
    river
  50. The source of a river?
    headwaters
  51. Land that borders a river and is covered by river water during a flood?
    floodplain
  52. The vertical face of rock that forms when the sea erodes land?
    sea cliff
  53. Limestone formations that have become filled with various passageways and large caves?
    caverns
  54. Deep cracks that develop on the surface of a glacier?
    cravasses

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