A typical delta is made of how many layers?

The variously shaped depressions of different dimensions that are developed in the riverbed are called ______

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

Bodies of seawater of considerable volume moving along and parallel to the shore are called ______

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

There is a spontaneous change from liquid to vapour state and back to liquid state at the point of fall of waterfall.

Magnificent jumps made by a stream or river water at certain specific parts of their course where there is a sudden and …

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