Q. Places of steep drops in elevation in the course of a river are called __________

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Q. The gently sloping land part that remains partly submerged under seawater is __________

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Q. The slope starting from the farthest end of the continental shelf and continuing up to sea floor is __________

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Q. The type of waves that are characteristic of deeper portions of the sea?

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Q. The type of waves that are characteristic of shallower portions of the sea?

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Q. Bodies of seawater of considerable volume moving along and parallel to the shore are called __________

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Q. The bodies of seawater moving backwards to sea after having reached and struck the seashore are called __________

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Q. Charles Darwin classified coral reefs into how many classes?

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Q. Peculiar type of ridge-like marine deposits that have been formed due to accumulation of dead parts of certain of sea-organisms are called __________

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Q. The type of reefs that occur from a distance of shore and have flat-topped ridges are __________

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Q. Type of reef with an annular, circular or semi-circular coral reef surrounding a lagoon is called __________

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