QUESTION TEXT: French divers recently found a large cave…
QUESTION TYPE: Most Strongly Supported
FACTS:
- You can only get into the cave through an underwater tunnel.
- The cave is full of water. The floor has stalagmites.
- Stalagmites form when water drops onto the ground.
ANALYSIS: The cave must not always have been full of water. Otherwise the stalagmites couldn’t have formed. Water drops can’t fall underwater.
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- A higher sea level in the past means the cave was probably full of water in the past too.
- CORRECT. Otherwise the Stalagmites couldn’t have formed because water drops couldn’t have fallen.
- There might have been others who discovered the cave and didn’t tell anyone.
- There’s no reason this would have to be true. Another entrance wouldn’t affect Stalagmite formation.
- We’re not told how much mineral content is required for Stalagmites.
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