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Erosion Precipitation Blocking front Hurricanes, warmer/milder Peru, fishing Sixth Tree rings (larger rings indicate El nino) Evolution Beak size Global warming. Once or twice Pacific Slacken or reverse direction. Chasing El Nino. No,we don’t know
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Erosion • Precipitation • Blocking front • Hurricanes, warmer/milder • Peru, fishing • Sixth • Tree rings (larger rings indicate El nino) • Evolution • Beak size • Global warming • Once or twice • Pacific • Slacken or reverse direction Chasing El Nino • No,we don’t know • Surface winds, currents, temperatures (any one) • Fishermen • They see only the surface or Volcanoes • El nino • ½ million • Droughts
Students my have difficulty finding these answers 1. Once or twice 18. Evolution For more lessons, visit www.chalkbored.com