Iris: Seismic Shadow Zones vs Light Shadows

What's that lurking in the shadows? An activity that demonstrates how eclipses happen. Science scholars investigate how light and distance interact to form shadows. The experiment uses simple materials to generate data and observations...

Shed some light on the nature of shadows! Science sleuths investigate a 200-year-old theory that light will form a bright spot in the center of a sphere's or circle's shadow with a video from Veritasium. The resource explains the...

The big question is, how do we know about the composition of the earth's core? Sal explains that at 105 degrees from the source point of an earthquake, the phenomenon of the p wave shadow zone leads us to conclude that the waves are...

Understand the basics of how P and S waves create the seismic shadow zones. [1:48]

What do S waves reveal about the Earth's surface? This video will illustrate the research. [2:11]

What can the P wave tell about the core of the Earth? Find out in a video. [3:26]

Is that right side of your brain yearning to express its artistic side? This is a project that blends art with science. Learn about light and colorful shadows in these experiments where you mix and match various colors of light to create...

Examine the behavior of seismic waves. This graph illustrates direct and critically refracted waves.

Discover the P-wave Shadow Zone and how it can be used to determine the diameter of Earth's outer core.

This activity focuses on using a box and a ball to experiment with light, shadows, and color. The goals are: Practice looking at light and shadow; Analyze how lighting influences the shape (soft/hard), color (hue) and value...