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The Four Seasons
Source Institutions
In this lesson that includes hands-on activities and demonstrations, learners discover that it is the tilt of the Earth's axis (not its proximity to the sun) that causes the seasons.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-970.jpg?itok=GF_xbjjx)
Star Search
Source Institutions
In this online activity, learners can test their skills at finding constellations in the northern hemisphere's night sky.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-058.jpg?itok=DHdlpneq)
Shape it Up
Source Institutions
In this online activity, learners see simulations of how processes shape the Earth, and see estimates of how long these processes take.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-940.jpg?itok=RymX7Kza)
Gravity Launch
Source Institutions
In this online game, learners attempt to send a rocket ship to various targets. Learners can adjust the angle and thrust of the rocket before it is launched.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-943.jpg?itok=svPqt_VY)
Solar Spin
Source Institutions
A group of learners models the Sun shining on the Earth. By rotating the Earth, they demonstrate how the Sun only shines on a portion of the Earth at a time.