__________ like the one in Guadalest are formed by water from rivers travelling over rock.

Which of these is NOT a sea?

______ are hills made out of sand.

____________ is the highest waterfall in the world.

The _________ is the biggest ocean in the world.

A _________ is a hill or mountain which covers a gap in the surface of the Earth. Gas or lava can come out of this gap at any time.

The Grand Canyon is an enormous, deep valley. The river which made it is called the ________.

In the Gobi March, competitors run 250 kilometres through the dunes of the Gobi desert. The race is part of a four-race desert challenge which also includes the __________.

________ is the capital city of Turkey.

Beautiful cliffs of ice are home to penguins in _________.

________ is the capital city of Argentina.

Underground, moving water also creates ______ like those in Nerja, Malaga.