Mystery of the Megaflood (adapted from PBS)
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Last updated about 1 year ago
17 questions
Note from the author:
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.
Required
21
Move each example measurement into the category of what it is measuring.
Move each example measurement into the category of what it is measuring.
- Washington Monument = 170 meters high
- Mississippi River daily output = 1.4 Cubic Km
- Football Field = 4,504 Square Meters
- Minimum Hurricane = 121 Km/h
- New York City to Washington DC =386 Km
- Marathon Race = 42.2 Km
- Eiffel Tower = 321 meters
- Spokane and Seattle = 367 km
- Delaware = 6,447 Square Km
- Highest posted interstate limit (Texas, 2005) = 129 Km/h
- 1993 Mississippi River Flood, Flow Rate .11cu km/h
- 1980 Mt. St. Helens debris surge = 500 km/h
- Mt. Everest 8,850 M high
- Lake Erie = 483 Cubic Km
- Lake Superior = 12,230 Cubic Km
- Maine = 91,700 Square Km
- Goodyear Blimp = 5,740 Cubic Meters
- Empire State Building = 381 meters
- HMS Titanic = 232,000 Cubic Meters
- Chicago's O'Hare Airport = 28.3 square km
- Utility pole = 11 meters high
- Length
- Height/depth
- Area
- Volume
- Speed
Required
1
During one of the most recent ice ages, about _________ years ago, ice sheets thousands of feet thick covered what is now southern British Columbia.
During one of the most recent ice ages, about _________ years ago, ice sheets thousands of feet thick covered what is now southern British Columbia.
Required
1
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?
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?
Required
1
Water melting from the glacier further north backed up behind the ice dam, forming Glacial Lake Missoula. It covered ____ square kilometers of western Montana.
Water melting from the glacier further north backed up behind the ice dam, forming Glacial Lake Missoula. It covered ____ square kilometers of western Montana.
Required
1
The climate warmed, weakening the ice dam's base. What happened when the ice dam could no longer resist the increasing water pressure?
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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1
As water rushed westward from the ice dam, it carved out the Channeled Scabland. What notable geographical feature did it create?
As water rushed westward from the ice dam, it carved out the Channeled Scabland. What notable geographical feature did it create?
Required
1
Rushing water also created present-day Dry Falls. What are its dimensions?
Rushing water also created present-day Dry Falls. What are its dimensions?
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1
At the flood's height, certain geographical shapes in Camas Prairie were formed. What are they?
At the flood's height, certain geographical shapes in Camas Prairie were formed. What are they?
1
The water tore across the Camas Prairie at a high speed. What was this speed?
The water tore across the Camas Prairie at a high speed. What was this speed?
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1
Despite its incredible nature, J Harlen Bretz theorized the flood happened ...
Despite its incredible nature, J Harlen Bretz theorized the flood happened ...
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1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Required
1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Required
1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Required
1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Required
1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Required
1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Required
1
Which of these comparisons works in this spot? (hint: only one correct answer per spot)
Which of these comparisons works in this spot? (hint: only one correct answer per spot)