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WorksheetsMt St Helens Facts
Total questions: 20
Worksheet time: 4mins
When did Mt St Helens erupt?
18th May 1970
18th March 1980
18th May 1980
18th March 1990
For how long had it been dormant?
23 years
123 years
73 years
1,230 years
Which agency were monitoring the volcano?
USGS
FEMA
NHC
FBI
Approximately how many people died?
57
77
38
120
In which state is Mt St Helens?
Washington
Wyoming
Wisconsin
West Virginia
How many bridges were damaged?
17
7
27
37
How many km of railways were damaged?
25
50
250
150
Which lake was blocked by the ash fall
Spirit Lake
Lake Pontchartrain
Lake Eerie
Great Slave
On which side of the mountain was the bulge that led to the collapse?
North
South
East
West
Which of these rivers was NOT effected by the eruption
Colombia River
Cowlitz
Toutle
Potomac
What magnitude of earthquake accompanied the collapse?
4.1
5.5
5.1
4.7
Approximately how many salmon hatchlings were killed?
120,000
2 million
12 Million
200,000
Approximately how many km of roads were damaged?
100
200
400
300
In what mountain rage is Mt St Helens?
Cascade
Carpathian
Andes
Cotswolds
How long did it take for ash from the eruption to circle the globe?
5 days
30 days
5 weeks
15 days
Which two tectonic plates collide to form Mt St Helens?
Juan de Fuca
North American
Pacific
Nazca
Who led the National Guard rescue operation?
Cpt Hagerman
Gen Honare
Cpt Flasheart
Gen Gordon
What radius of trees around the mountain were destroyed?
5 miles
15 miles
8 miles
18 miles
How much elevation was lost from the mountain?
1300ft
300ft
1000ft
700ft
How many survivors were rescued from the blast zone?
100
130
160
190
