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Archaeologists sometimes use sound waves to help them find objects at underwater sites.

There are more species of life in the water than on land.

Below 2,000 feet the ocean is completely dark.

What's the Big Idea about Water?

Photos: girl drinking: Natasha Paterson / AGE Fotostock tree: Digital Vision / AGE Fotostock; polar bear: NOAA; kangaroo rat: AMNH / R. Mickens morning mist, snowflakes: J. Falk volcano: Coombs / USGS snowy streets: Image 100 / AGE Fotostock; sea ice: NSF clouds: V. Ryzin; Grand Canyon: NPS Central Park; rocks: AMNH / T. Gaud iceberg: AMNH / C. Chesek; carrying water: Digital Vision / AGE Fotostock; hamburger: Science Museum of Minnesota; dam: BPA wetland: USDA; girl drinking from water fountain: R. Friedman

Water is a precious resource, and all things need water to survive.

Arctic Story Puzzles

Illustrations: Eric Hamilton

Solve these story puzzles to find out more about how life in the Arctic is affected by climate change. 

Be a Water Saver

Simple things that you can do to help protect fresh water and the living things that depend on it.

Living on Ice

Video: "Polar bears weather the winter": Footage by David O. Brown, courtesy of the Macaulay Library at the Cornell Lab of Ornithology; "Polar bears need ice to survive": Footage by David O. Brown, courtesy of the Macaulay Library at the Cornell Lab of Ornithology; "An Inuit man sees changes": Footage courtesy of the International Institute of Sustainable Development; "Arctic sea ice is shrinking": Images created using data from the National Snow and Ice Data Center; Illustrations: Polar bear illustrations by Chris Burda

Solve these interactive story puzzles to find out how people and other animals live in the Arctic.

What do you know about virtual water?

Photos: Science Museum of Minnesota

Water Books for Kids

Make a splash with these books about Earth's most precious resource.

Test Density with a Supersaturated Solution

Photos: Dead Sea: courtesy of Frieda Supplies; What to Do: courtesy of AMNH

Do fresh water and salt water mix? Find out in this experiement.

Journey to the Bottom of the Sea

Photos: Adriana Aquino: courtesy of AMNH, Denis Finnin; Illustations: Jim Paillot

Can you make it down to the ocean floor? Along the way, discover what makes water special.


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