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Modeling Day and Night
Source Institutions
In this activity (on page 1 of the PDF), learners make a "mini-globe" to investigate the causes of day and night on our planet.
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The Geophysical Light/Dark Cycle
Source Institutions
This is an activity (located on page 131 of the PDF) related to sleep and circadian rhythms as well as space travel.
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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-000-000-002-231.png?itok=VVna7t5x)
My Solar System
Source Institutions
In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-463.png?itok=fcIQUMfc)
Morning Star and Evening Star
Source Institutions
This demonstration activity models how Venus appears from Earth.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-577.png?itok=ptETfKBd)
Modeling the Night Sky
Source Institutions
In this two-part activity, learners explore the Earth and Sun's positions in relation to the constellations of the ecliptic with a small model.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-535.png?itok=7sKh2tES)
Reason for the Seasons
Source Institutions
In this activity (on page 6 of the PDF), learners plot the path of the sun's apparent movement across the sky on two days, with the second day occurring two or three months after the first.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-130.jpg?itok=UR5SVNwO)
The Shadow Knows I
Source Institutions
In this activity, learners will measure the length of their shadow from the Sun and compare it three to four months later.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-517.jpg?itok=7phaKEp-)
Changing Shadows
Source Institutions
In this sunny day, outdoor activity, learners observe changes in shadows over time. The activity also helps to develop a sense of the Earth's motion.