WorksheetsMt. St. Helens
Total questions: 10
Worksheet time: 5mins
What is the name of the volcano that erupted in 1980, causing significant devastation?
Mount Rainier
Mount Hood
Mount Mazama
Mount St. Helens
What natural feature formed as a result of Mount Mazama's eruption?
Crater Lake
Yellowstone Lake
Spirit Lake
Lake Tahoe
How many years did Mount St. Helens remain dormant before its 1980 eruption?
100 years
150 years
123 years
75 years
What was the time of the earthquake that initiated Mount St. Helens' 1980 eruption?
8:32 a.m.
9:15 a.m.
10:00 a.m.
7:45 a.m.
Which city became a ghost town due to volcanic ash from Mount St. Helens?
Seattle
Yakima
Spokane
Portland
What phenomenon did Mount St. Helens create that affected visibility and transportation?
Ash clouds
Lava flows
Snow storms
Mud flows
How deep is the lake that formed in the caldera of Mount Mazama?
About 4000 feet
About 5000 feet
About 3000 feet
About 2000 feet
What is the name of the emerging volcanic cone of a reborn Mount Mazama?
Mystic Island
Wizard Island
Dragon Island
Phoenix Island
Which river's valleys were filled with massive flows of debris from Mount St. Helens?
Toutle River
Columbia River
Chehalis River
Snake River
What was the height of the ash clouds produced by Mount St. Helens during its 1980 eruption?
10 miles
12 miles
14 miles
16 miles
