Pbs Learning Media: Relativity and the Cosmos

The enormity of the solar system can sometimes be too big to imagine. A scale model can help us visualize the size in an easy to understand way. Watch as scientists build a model of the solar system in a dessert just 7 miles in diameter!...

Check out a world map hosting a variety of options for views of various soil types. Identify the different soils and where they can be found.

This video segment adapted from Shedding Light on Science demonstrates the law of reflection, showing how light energy is reflected off both smooth and rough surfaces at predictable angles. Includes background reading material and...

Play in our streams and see how exhibitionism has an evolutionary payoff in this simulation of John Endler's famous experiment. Includes background information and discussion questions.

This video segment adapted from NOVA/FRONTLINE examines the greenhouse effect, its role in keeping Earth habitable, and the industrial changes that have led to an increase in the planet's average temperature. Includes background reading...

In this lesson, students learn how DNA fits into chromosomes, how chromosomes relate to the human body, DNA replication, and protein synthesis.

Watch a colorful display of light under the Antarctic! This video reveals what is below the sea ice and the pictures are stunning. Closed caption available. [4:35]

The region off the west coast of Antarctica has lost gigatons of ice and the sea ice is freezing later and melting earlier. In this video from NOVA, learn about the effects of these changes from researchers who are tudying this...

Travel along on the research vessel Polarstern to learn about the Arctic ecosystem. Scientists will describe the relationship between annual variations in sea ice and the krill population which is fundamental to the Antarctic food web....

When light strikes an object it can cause reflection or absorption depending on the wavelength of the light and the property of the material that makes up the object. Watch this whiteboard animation for a full explanation and to find out...