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Ramps 1: Let it Roll!
Source Institutions
In this activity about ramps, learners explore and measure the rate at which spherical objects roll down a ramp.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-309.png?itok=D_PuXsQ9)
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-000-000-003-067.jpg?itok=Fz0uaORM)
Mountain Mash
Source Institutions
Learners model the processes that formed some of Earth's largest mountain ranges: the Himalayas, the Andes, and the Alps.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-969.jpg?itok=PIA1LMbR)
Light of the Moon
Source Institutions
Learners model the Sun-Earth-Moon system to show what causes the Moon's appearance to change when viewed from the Earth.
![](/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.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-942.jpg?itok=Uqo0BGx7)
Dunk and Flip
Source Institutions
Learners complete two simple experiments to prove the existence of air and air pressure which surround us.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-057.jpg?itok=X60Mv-na)
Reunite Pangaea
Source Institutions
Learners cut out pictures of continents and attempt to put them together to form Pangaea, the supercontinent present on the Earth approximately 300 million years ago.