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Topics/Subjects:
Earth processes  
States of matter  
Learning Time:
1 to 2 hours  
Instructional Strategies:
Computer simulations/models/visualizations  
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Intended for use prior to viewing the Science on a Sphere film "Water Falls," this lesson introduces students to Earth's water cycle and the importance of freshwater resources.

This is a lesson about the science supporting the design and operation of an ion propulsion engine. Learners will study the concepts of formation and discharge of charged particles, attractive and repulsive forces between charged particles, and the... (View More)

Audience: High school
Materials Cost: Free
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