River which joins a large river.

Which is a very huge and beautiful waterfall in Canada?

Hot molten rock that bursts out from a volcano.

Hot melted rock

What is known by Large divisions of lands?

What is known as a land which is surrounded by water on all sides? 

Low land lying between two or more hills.

What is said to be a piece of land projecting  into the sea?

Which is the largest country?

Sandy place with little or no rainfall