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Educational Level:
Middle school  
Topics/Subjects:
Earth structure  
Resource Type:
Animation/movie  
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Derived from the Science on a Sphere film entitled "Water Falls," this short (2:50) video presents basic information on the percentage, allocation, and distribution of Earth's usable water.

In this video-based activity, students learn that sea level is an average measurement of the height of the ocean, and sea level changes with the seasons and over time. El Niño and La Ninña events are compared, demonstrating that sea height is a... (View More)

Audience: Elementary school, Middle school
Materials Cost: Free per student
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