Ice Formations and Lake Superior

What natural process contributes to the growth of icicles each winter?

• Sublimation

• Condensation

• Evaporation

• Thawing and freezing

What geological feature is formed when waves erode the base of sandstone cliffs?

• Volcano

• Delta

• Glacier

• Reentry

Where are the ice formations at Lake Superior typically found?

• On mountain peaks

• In desert oases

• On riverbanks

• In sea caves and arches

What colors can the frozen waterfalls at Lake Superior reveal due to mineral content?

• Red and yellow

• Black and white

• Orange and blue

• Green and purple

When are the ice caves at Lake Superior accessible for exploration?

• During summer months

• Only during really cold winters

• Throughout the year

• Only in spring