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Topics/Subjects:
Physical sciences  
Resource Type:
Lecture  
Demonstration  
Materials Cost:
1 cent - $1  
Learning Time:
30 to 45 minutes  
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This model demonstrates convection currents and uses water, food coloring, a cup of very hot water and a votive candle as heat sources. Movie clips of demonstration setup and convection in action are provided. This activity is supported by a... (View More)

In this activity, students compute the strengths of the gravitational forces exerted on the Moon by the Sun and by the Earth, and demonstrate the actual shape of the Moon's orbit around the Sun. The lesson begins with students' assumptions about the... (View More)

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