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Activity
Scholastic

Scholastic: Dirtmeister's Science Lab: Let the Sun Shine In

For Students 6th - 8th
Students graph data reflecting time of day and length of shadow, and then draw conclusions about Earth's seasons and position in relation to the Sun.
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Handout
Science U

Science U: Reasons for the Seasons

For Students 9th - 10th
This webpage uses diagrams and video to explain the causes of the seasons.