AY Honors/Waterfalls/Answer Key

Hopetoun Falls near Otway National Park, Victoria, Australia

A waterfall is usually a geological formation resulting from water, often in the form of a stream, flowing over an erosion-resistant rock formation that forms a sudden break in elevation.

Some waterfalls form in mountain environments where erosion is rapid and stream courses may be subject to sudden and catastrophic change. In such cases, the waterfall may not be the end product of many years of water action over a region, but rather the result of relatively sudden geological processes such as landslides, faults or volcanic action.

Waterfalls may also be artificial, and they are sometimes created as garden and landscape ornaments.

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Types of waterfalls

Havasu Falls, near Supai, Arizona, is an example of a plunge waterfall.

Block: Water descends from a relatively wide stream or river.
Cascade: Water descends a series of rock steps.
Cataract: A large waterfall.
Fan: Water spreads horizontally as it descends while remaining in contact with bedrock.
Horsetail: Descending water maintains some contact with bedrock.
Plunge: Water descends vertically, losing contact with the bedrock surface.
Punchbowl: Water descends in a constricted form, then spreads out in a wider pool.
Segmented: Distinctly separate flows of water form as it descends.
Tiered: Water drops in a series of distinct steps or falls.
Multi-Step: A series of waterfalls one after another of roughly the same size each with its own sunken plunge pool.

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Examples of large waterfalls

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Significant waterfalls include these alphabetically:

Angel Falls, the world's highest at 979 m (3212 ft), in Venezuela
Cascata delle Marmore in Italy is the tallest man-made waterfall in the world
Gocta, the fifth highest in the world at 771 m (2533 ft), located in the province Chachapoyas, Peru
High Force on the River Tees is one of the tallest waterfalls in England
Iguazu Falls, a tall and extremely wide fall located in South America on the Argentina/Brazil border
Jog Falls, India's eight highest (listed as 313 ranking on the World Waterfall Database), located in Karnataka state, India
Jurong Falls in Singapore is the tallest artificial waterfall in the world
Niagara Falls is the most powerful falls in North America
Ramnefjellsfossen, the world's third highest at 808m (2685 ft), at Stryn, Nesdalen, Norway
Rhine Falls, Europe's largest, located in Switzerland
Tugela Falls, the world's second highest at 947 m (3110 ft), in KwaZulu-Natal province, Republic of South Africa
Victoria Falls, the largest waterfall in the world, over a mile long and located on the Zambezi river on the border of Zimbabwe and Zambia.
Yosemite Falls, arguably the tallest in North America, located in Yosemite National Park, United States