- A large piece of ice broke off from the side of the glacier and fell into the ocean.
- Acid rain slowly melts limestone.
- The columns found in caves take millions of years to form.
- Rick dug a large hole in the ground.
- The course teaches people how to survive in the wilderness.
- In early spring, water drips from melting ice.
- The calcite in the caves hardens overtime.
- The explorer got down on his knees and crawled into the cave.
Ответ: glacier, melts, form, hole, survive, drips, hardens, crawled.