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Laabri

Mystery of the Megaflood (adapted from PBS)

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Last updated over 1 year ago
17 Nsɛmmisa
Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

This is a lesson modified from the PBS lesson at https://www.pbs.org/wgbh/nova/teachers/activities/3211_megafloo.html

I've added some supports for younger students and removed some more complicated vocabulary.

Read the lesson attached and answer the questions as you go.

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1.

Move each example measurement into the category of what it is measuring.

  • Highest posted interstate limit (Texas, 2005) = 129 Km/h

  • 1993 Mississippi River Flood, Flow Rate .11cu km/h

  • Mississippi River daily output = 1.4 Cubic Km

  • Goodyear Blimp = 5,740 Cubic Meters

  • Lake Erie = 483 Cubic Km

  • Delaware = 6,447 Square Km

  • New York City to Washington DC =386 Km

  • Maine = 91,700 Square Km

  • Spokane and Seattle = 367 km

  • Utility pole = 11 meters high

  • Minimum Hurricane = 121 Km/h

  • Empire State Building = 381 meters

  • Football Field = 4,504 Square Meters

  • 1980 Mt. St. Helens debris surge = 500 km/h

  • Eiffel Tower = 321 meters

  • HMS Titanic = 232,000 Cubic Meters

  • Marathon Race = 42.2 Km

  • Chicago's O'Hare Airport = 28.3 square km

  • Lake Superior = 12,230 Cubic Km

  • Mt. Everest 8,850 M high

  • Washington Monument = 170 meters high

  • Length

  • Height/depth

  • Area

  • Volume

  • Speed

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Asemmisa {{asɛmmisaAhyɛnsode}}
2.

During one of the most recent ice ages, about _________ years ago, ice sheets thousands of feet thick covered what is now southern British Columbia.

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3.

A lobe from the Cordilleran ice sheet crept into the Idaho panhandle and blocked the Clark Fork River with an ice dam. How high was the ice dam?

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4.

Water melting from the glacier further north backed up behind the ice dam, forming Glacial Lake Missoula. It covered ____ square kilometers of western Montana.

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5.

The climate warmed, weakening the ice dam's base. What happened when the ice dam could no longer resist the increasing water pressure?

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6.

As water rushed westward from the ice dam, it carved out the Channeled Scabland. What notable geographical feature did it create?

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7.

Rushing water also created present-day Dry Falls. What are its dimensions?

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8.

At the flood's height, certain geographical shapes in Camas Prairie were formed. What are they?

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9.

The water tore across the Camas Prairie at a high speed. What was this speed?

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10.

Despite its incredible nature, J Harlen Bretz theorized the flood happened ...

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11.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)

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12.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)

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13.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)

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14.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)

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15.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)

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16.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)

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17.

Which of these comparisons works in this spot? (hint: only one correct answer per spot)