Describe the ‘theory of central heat’ and how Professor LidenBrock planned to disprove it? What is the ‘abyss attraction’ Axel talks about in Ch 17? Have you ever experienced this feeling? If so, where?

The professor did not hesitate in taking the path to the east at the fork. Why did he take this path so confidently and what does his reasoning show about his character?

Axel begins to notice the changes in the rocks as they walk through the east tunnel. What do these changes tell Axel about the route they are taking? How does Professor Lidenbrock react to Axel’s observations and concerns?

Why did the Professor save some water when it seemed their water supply had run out?
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