An opening in Earth’s surface, through which lava flows

Deep valley with high, steep sides formed by the moving water in rivers

Wide, flat areas of land

Land which rises high above the ground; usually an elongated line

Low land between hills or mountains

Generally lower than the land around them; they may be found along a coast or inland.

The________ is located in northern Arizona and is one of the great tourist attractions in the United States.

Many of the world's active ___________ are located around the edges of the Pacific Ocean

Found in mountainous regions like the Alps, Himalaya, Rocky mountains, Scottish Highlands, Scandinavia, New Zealand and Canada

Most of the world's major _______ are located along tectonic plate boundaries.

This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment.