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In this activity, students become familiar with the orientation of shadows, their size in relation to the object casting them, and how the alignment of the Sun, the object, and the shadow tells us much about how shadows work. Supplies needed for... (View More)

The rate that the snow melts is crucial in determining how fast water will reach the streams and rivers and thus, how damaging the flooding may be. This resource provides a step-by-step calculation of the volume of water stored in the snow in the... (View More)

Audience: Middle school
Materials Cost: Free per student

In this exercise, learners use basic arithmetic to determine the amount that sea level would rise around the globe with the melting of the Greenland and Antarctic ice sheets. Basic data for this calculation is provided. This resource is from PUMAS -... (View More)

Audience: Middle school
Materials Cost: Free per student

This is a book about the Cassini-Huygens mission to Saturn. Learners may read about what is involved in sending a large spacecraft to the outer solar system. One chapter explains the mission, another the spacecraft. Other chapters tell about Saturn,... (View More)

Audience: High school

This is a lithograph about Mars. It contains an image of mars on the front and informational text about the way the Hubble telescope is being used to study the weather on Marson the back.

This activity is intended as a review of the concepts presented in the previous activities as well as an assessment of student understanding of the activities. Learners use the review information from the activities as they answer question and then... (View More)

In this activity, students measure the length of the day using the rotation of the Earth, and discover that the Sun is not exactly in the same place at the same clock time every day, understand that the changes are due to motions of the Earth, and... (View More)

This hands-on activity demonstrates how the combining two fluids (confluence of two rivers, Mediterranean water spilling over the straits of Gibraltar into the Atlantic) involves two processes: (1) stirring - stretching of the bulk fluid, and (2)... (View More)

We've all seen pictures of the Earth and its atmosphere as a series of concentric circles, showing the troposphere, stratosphere, ionosphere, etc., often looking like a bullseye target with the solid Earth in the middle. But if we were to draw that... (View More)

Keywords: Scale

In this activity, learners practice estimation skills as they begin to explore the Hubble Deep Field image. They first give a rough estimate of the number of objects and then follow several steps, using representative sampling techniques, to improve... (View More)