a larger body of water completely surrounded by land. 

natural body of water flowing under the earth. 

a mountainous vent in the earth’s crust through which ash, lava, and gases escape.

a scratch or carving in the bedrock made by the slow movement of a glacier.

a large area of flat land.

the low flat land near a river that often floods.

land surrounded by water on all sides.

a huge mass of ice formed from snow falling and accumulating over time.

deep valley with steep sides, usually formed by water. 

an underground hollow area formed by weathering.

A long narrow region of low land between mountains. 

land above weathered rock that has fallen in a hole in the ground. 

the natural elevation of the earth’s surface greater than 2,000 feet above sea level. 

natural elevation of the earth’s surface less than a mountain.

hill of sand formed by the wind, usually found near a desert or water.