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STANDARDS
CCSS: 3.MD.B.3, 4.MD.A.2
TEKS: 3.8A, 3.8B, 4.9A, 4.9B, 5.9C
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Ice Caves
In winter, people can visit ice caves at Apostle Islands National Lakeshore in northern Wisconsin—but only if itʼs cold enough.
Posnov/Moment RF/Getty Images
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Jim McMahon/Mapman®
The ice caves are located off Lake Superior. This is one of the 5 Great Lakes of North America.
32
Shutterstock.com
Water freezes at 32 degrees Fahrenheit.
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Cave ice must be at least 10 to 12 inches thick to be considered safe to walk on.
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