How does the sun determine the Earth's seasons? This is the question that the National Geographic Education site seeks to answer with a lively 35-minute activity designed for students between the ages of seven and...
This lesson plan uses NASA satellite data to correlate cloud cover over Africa to the solar declination. The four seasons on Earth have a scientific basis. The earth is tilted 23.5 degrees from vertical. This tilt and...
The College of Saint Benedict/Saint John's University furnish an online version of Chapter II of Simon Newcomb's astronomy book, where he attempts to explain the laws of phenomena of celestial motions to "the inquiring...
This site consists of activities to discover why daylight hours vary in length and to understand the relationships between the Sun and the Earth that cause these changes. The activities use indirect observations of the...
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