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Exploring Earth's Dynamic Forces

Uncover the secrets of rivers, plate tectonics, erosion, and earthquakes in Earth's geologic history. Learn about oxbow lakes, old meanders, and more as you journey through time and discover the forces shaping our planet.

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Exploring Earth's Dynamic Forces

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  1. Rivers Geologic History Plate Tectonics Erosion Earthquakes 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

  2. Oxbow lakes would be found along this type of river.

  3. Old

  4. Meanders would be found along this type of river.

  5. Old

  6. Rapids and waterfalls would be found along this type of river.

  7. Young

  8. Floodplains would be found along this type of river.

  9. Old

  10. These are the wide curves of a river.

  11. Meanders

  12. A dinosaur footprint would be an example of this type of fossil.

  13. Trace Fossil

  14. This is the gradual change in life forms over geologic time.

  15. Evolution

  16. This is a break in the rock record where something has been eroded away.

  17. Unconformity

  18. This is the era in which the dinosaurs lived.

  19. Mesozoic

  20. This is the era in which we are living.

  21. Cenozoic

  22. This is the great supercontinent that contained the entire land mass about 220 million years ago.

  23. Pangaea

  24. A mid-ocean ridge is an example of this type of plate boundary.

  25. Divergent (Spreading)

  26. An ocean trench is an example of this type of plate boundary.

  27. Convergent (Subduction)

  28. Rocks closer to a mid-ocean ridge would be this relative age.

  29. Young

  30. This is the force responsible for plate movement.

  31. Convection Currents

  32. This is the loose, broken rock at the base of a slope.

  33. Talus

  34. This is a calcite formation on the ceiling of a cavern.

  35. Stalactite

  36. This is the downward slipping of sediment along a curved surface.

  37. Slump

  38. This is the slow, downslope movement of loose soil caused by freezing and thawing.

  39. Creep

  40. This is the largest soil texture which drains well.

  41. Sand

  42. This is the difference in arrival times between P-waves and S-waves.

  43. Lag (Separation) Time

  44. This is the point at which the rock breaks to start an earthquake.

  45. Focus

  46. This is the minimum number of seismograph stations needed to locate an earthquake.

  47. Three

  48. This is the fastest seismic wave. This wave can travel through liquids.

  49. P-wave

  50. A massive earthquake on the ocean floor could potentially cause this type of wave.

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