Stalactites and stalagmites are types of–

• A. caves.

• B. speleothems.

• C. minerals.

• D. insects.

Paragraph 3 is mainly about the–

• A. background of the word speleothem.

• B. dangers of cave exploration.

• C. differences between land and underwater caves.

• D. process of stalactites and stalagmites formation.

The temperature outside the cave affects the–

• A. people exploring the cave.

• B. water temperature of underwater caves.

• C. size of the cave.

• D. amount of carbon dioxide in the soil.

The word deposit in paragraph 3 means–

• A. to store or entrust with someone for safe keeping.

• B. to unceremoniously set down something in a specific place.

• C. the gradual laying down of matter through a natural process.

• D. to keep a sum of money in a bank.

An important mineral in the formation of stalactites and stalagmites is–

• A. fluorite.

• B. calcite.

• C. sodalite.

• D. pyrite.

Carlsbad Caverns in New Mexico is one of the world’s largest underground cave areas. It encloses numerous beautiful stalactite and stalagmite rock formations. Geologists studying the underground growth of these rock formations can get an indication of the amount of rainfall the cave receives. Discuss how it is possible to make the connection between rainfall and the growth of rock formations.

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