Caves with Squeaks

What is the basic definition of a cave?

• A large space underground or in a hard surface like rock.

• A hole dug by people for shelter.

• A place where water always flows.

• A structure made entirely of ice.

How are limestone caves primarily formed?

• Ocean waves repeatedly crashing against cliffs.

• Molten rock flowing and leaving empty tubes.

• Acidic water dissolving limestone underground.

• Glaciers melting and carving out spaces in ice.

What natural process creates sea caves?

• Underground rivers eroding soft soil.

• Volcanic eruptions creating tunnels.

• Ocean waves eroding cracks in cliffs.

• Ice melting inside glaciers.

How do lava caves (lava tubes) form?

• Water and acid dissolving rock over millions of years.

• The top layer of flowing lava cools and hardens, while the molten lava underneath flows away.

• Ocean tides creating large openings in coastal rocks.

• Warm temperatures melting ice within a glacier.