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A cloud, flat on the bottom, with a very tall, large top that is shaped like a mountain

This picture shows a cumulonimbus cloud. Understanding clouds is important to NASA because clouds help predict how Earth's climate will change in the future. Image Credit: NASA

      a mass of tiny water drops or ice crystals that floats in the air above the Earth

The CERES S'COOL project asks students to help NASA study the different types of clouds.

The clouds blocked the sunlight.

More Information:
http://asd-www.larc.nasa.gov/SCOOL/   →