Pbs Learning Media: Sources of Radiation

This interactive activity from the NOVA: "Dirty Bomb" Web site explores sources of radiation, both harmful and beneficial, natural and manmade.

Scientists study ice sheets because they influence weather and climate, playing a role in atmospheric and ocean circulation. Ice sheets can also have huge impacts on global sea levels because they store so much water. Explore this...

Learn about thermal energy, also known as heat or heat energy, and the ways in which it can move from one object to another,

This video segment adapted from NASA's Goddard Space Flight Center explains how and where hurricanes develop. Learn how El Nino events alter the course of atmospheric circulation. Includes background reading material and discussion...

In this lesson, students watch a video and animations that relate Isaac Newton's three laws of motion to baseball and apply what they've learned about these laws to another sport or other real-life situation.

Students learn about the giant impact hypothesis for the Moon's formation, and how the Apollo Moon rocks have contributed to scientists' understanding of the Moon.

Students learn how various kinds of data and information can be gathered to create a biodiversity timeline that serves as evidence of changes in a population of a species.

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...

Three choices of virtual worlds to enter: a vulture, a wolf or a shark world. Once inside these worlds view videos, play games, and discover the ecosystems of these wild animals.

How much radiation are we exposed to every day? Find out in this video segment adapted from FRONTLINE: "Nuclear Reaction." [1:46]