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Cloud
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 EarthSentences:
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/ →