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Earth structure  
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High school  
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This is an online set of information about astronomical alignments of ancient structures and buildings. Learners will read background information about the alignments to the Sun in such structures as the Great Pyramid, Chichen Itza, and others.... (View More)

Audience: Middle school, High school, Informal education
Materials Cost: Free

In this laboratory activity, learners explore the difference between heat and temperature, and explore the rate of heat transfer from one substance to another as it depends on the density of the substances being investigated. The activity can be... (View More)

In this activity, students measure the length of the day using the rotation of the Earth, and discover that the Sun is not exactly in the same place at the same clock time every day, understand that the changes are due to motions of the Earth, and... (View More)

This is an activity about the Sun's position in the sky. Learners will use a clear plastic hemisphere to create a model of the sky and mark the position of the Sun in the sky on the hemisphere several times throughout the day. From this information,... (View More)

Audience: High school
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