What kind of landform has very steep sides that were cut by a river's erosion and time?

Going over this landform will make you shiver. It occus when there's a sharp drop off in a river. 

You get this landform when oceans run dry. They're broad, flat spaces stretching under the sky. 

What kind of landform is the tallest of all with a spiky top where snow may fall?

What kind of landform always runs downhill and can be used to turn turbines that power a mill?

Landforms like this are often found in the side of a mountain or as a hole in the ground. 

What kind of landform is a huge chunk of water that takes up three-fourths of the earth and is salty?

This landform is found at the bottom of mountains and very tall hills; it's the low land between them. 

To get this landform, a boat you may ride since water surrounds it on every side. 

Triangle-shaped landforms like this often sit near the ocean where a river finally runs into it. 

Which type of landform stretches into the tides: surrounded by water on three of its sides?

This large body of water is surrounded by land. It's a great place to fish or swim. 

When the wind and the rain wear a mountain away, the mound that is left is this landform. 

Which type of landform is just one of seven? It's really big place split up into nations.