Body Waste

This video segment from IdahoPTV's D4K takes a look at the reasons why body waste keep you healthy and the parts of the body form the waste products, urine, pus, carbon dioxide, gas and feces.

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Body Waste that Protects You

This video segment from IdahoPTV's D4K covers the body wastes that protect you: earwax, mucus, tears, sweat and vomit.

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Booming Sands

This video segment, adapted from NOVA scienceNOW, presents basic concepts of physics behind "booming" sand dunes. See how surface tension affects potential and kinetic energy and how it all works together to create sound.

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The Bounty of Bees

Bees are an extremely vital part of life on this planet. In this video segment from QUEST, explore the huge impact these small insects have on our civilization.

The Brain

This video segment from IdahoPTV's D4K explores the anatomy of the brain and how your brain interacts with the rest of your body.

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The Brain in Action

This video segment from The Human Spark observes the brains responses to a series of cognitive tests.

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Brain Trauma

Find out how serious head concussions can be in this video segment adapted from NOVA scienceNOW.

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Breaking Point: Testing Tensile Strength

This video excerpt from NOVA’s "Making Stuff: Stronger" and accompanying demonstration illustrate the toughness and tensile strength of Kevlar® and other everyday materials.

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Breathing Blue

In this demonstration of chemical change, the presenter blows breath into a methylene blue solution releasing carbon dioxide which acidifies the water and changes it from a bright blue color to green.

Bringing Down the Bolt

Learn about how lightening strikes in this video segment from Science Friday.

Bt Corn

This video segment from FRONTLINE/NOVA: "Harvest of Fear" looks at corn that has been genetically modified to resist one insect pest, and the multiple concerns it raises.

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Bubonic Plague

In this video segment adapted from A Science Odyssey, learn about bubonic plague and how city officials in San Francisco tried to contain its spread in the early 1900s.

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Building a Cleaner Battery

This video excerpt from NOVA’s "Making Stuff: Cleaner" and accompanying activity guide for grades K–8 introduce students to the design and use of batteries and the rapidly developing science of clean energy and clean materials.

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Building a Dam Like a Beaver

In this video segment from PEEP and the Big Wide World, children make a dam with dirt, sticks, and stones to try to stop the flow of water.

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Building a Fence

In this Cyberchase video segment, Harry must build a rectangular fence in his grandmother's backyard using fencing of various sizes.

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Building Curiosity: Rover Rocks Rocker-Bogie

NASA engineers test Curiosity, the Mars Science Laboratory rover, and demonstrate its material properties, its handling and mobility, and its design features in this NASA video.

Building Simple Machines: A Glass of Milk, Please

In this video segment adapted from ZOOM, the cast shows how the 34 steps in their Rube Goldberg invention use everything from gravity to carbon dioxide gas in order to accomplish one simple task: pouring a glass of milk.

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Building Simple Machines: Plant Quencher

In this video segment from ZOOM, Jillian explains how her simple machine uses marbles, levers, flowing sand, and a spinning wheel to water a plant.

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Building the Alaska Oil Pipeline

This video segment adapted from AMERICAN EXPERIENCE tells the story of how environmentalists, Alaska Native peoples, and engineers concerned about the effects of permafrost challenged plans for the Alaska oil pipeline.

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Building the Channel Tunnel

How do you build a tunnel 32 miles long -- under water? This video segment adapted from Building Big, follows the construction of the Channel Tunnel (nicknamed "Chunnel"), the engineering wonder that connects England to France.

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Burrowing Owl

In this video segment from Outdoor Nevada, learn about burrowing owls, yearlong residents of open, dry grassland and desert habitats, and the only owls that nest underground and are active both day and night.

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The Business of Bioplastics

This video excerpt from NOVA’s "Making Stuff: Cleaner" and accompanying demonstration introduce students to the production and importance of bioplastics, or plastics made from plant or animal products.

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Butterflies

This video from Vegas PBS features colorful insects known as butterflies, and looks at the coloration, species, life cycle, and migration habits within their habitat.

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California's Lost Salmon

Salmon have disappeared from more than 40 percent of their range in the West. In this video from QUEST produced by KQED, learn about the important role these fish play in native ecosystems.

California's Water Supply

This resource developed from KQED's QUEST, uses California’s delicately balanced watershed as an example of how the water cycle operates.

Calorimetry

Do you know how many calories are in a macadamia nut? This video segment highlighting a Calorimetry experiment will give you the answer.

Can a Computer Fly an Airplane?

This video excerpt from NOVA shows how the computer system on the A330 airplane can fly the plane safely without a human pilot.

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Can We Slow Aging?

In this video segment adapted from NOVA scienceNOW, scientists discuss a family of genes called FOXO that can significantly extend life span in worms—and in humans.

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Capturing Carbon

In this video segment adapted from NOVA scienceNOW, a scientist, inspired by his daughter's science fair project, develops a synthetic "tree" to remove excess carbon dioxide from the air.

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Carbon-Fiber Car of the Future

In this video segment adapted from NOVA, find out how cars made of a material stronger than steel and half the weight can help combat climate change.

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Careers in Plastics

Learn about opportunities for working in the growing field of plastics, including the emerging area of "green" technologies, in this video segment adapted from Pennsylvania College of Technology and WVIA.

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Carnival Physics: Midway Games

Follow Mary Jane and Eliza as they test and measure the best way to use a moving ball's energy to win at carnival games in this video from DragonflyTV.

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Carnivorous Plants of Texas

In this video adapted from Texas Parks and Wildlife Department, learn about carnivorous plants that act as both producers and consumers in an ecosystem. See sundews and blatterworts capture and digest insects.

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Carnivorous Plants of Cartwheel Bay

In this video segment from NatureScene, explore Cartwheel Bay, a wetland in South Carolina, and learn about the variety of carnivorous plants native to this unique landform.

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Cars in America: Investing in Detroit's Future

From FRONTLINE Heat, this video explores the car industry's resistance to higher fuel efficiency standards.

Cave Formation: Biogeochemical Cycles

This video segment adapted from NOVA chronicles the discoveries that led to a radical new theory in which living organisms, not just geological processes, play an active role in cave formation.

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Cave Formation: Kane Cave

This video segment adapted from NOVA describes a simple experiment that confirmed the idea that microbes can accelerate the biogeochemical process of cave formation.

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Caves: Extreme Conditions for Life

This video segment adapted from NOVA raises the provocative idea that if life can exist in the most extreme environments on Earth — such as in dark, toxic caves — then perhaps living things can also survive in harsh environments on other planets.

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Celestial Sphere

This animation is a simple model of the apparent motion of the stars in the night sky. Ancient people described the motions as if the stars were all attached to a vast globe, or a Celestial Sphere, centered about the Earth.

Cell Differentiation

In this video segment from The Secret of Life school video, "Sex and the Single Gene" follow as a single fertilized egg cell divides, differentiates, and assembles into the tissues and organs of a new organism.

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Center of Gravity: Pencil Balance

Watch the ZOOM cast learn about center of gravity by trying to balance a pencil on their fingers and noses.

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Centripetal Force

In this animation a ball bounces off the sides of the circle, and the number of sides double, until the circle appears to exert force on a ball that is constant in size and always directed towards the center.

Centripetal Force: Roller Coaster Loops

This video segment explains centripetal force and illustrates how roller coasters rely on it to give you a thrilling ride.

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Challenges of Incubation

This video segment from Nature examines American Eagles along the Upper Mississippi River and their struggle to protect their eggs from predators as well as from the cold, extreme weather.

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Changes in the Ozone Layer

This video segment produced by ThinkTV demonstrates how ozone is created in the upper atmosphere, explains its beneficial role, and explores the problem of ozone depletion.

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Changing Arctic Landscape

In this video adapted from the Arctic Athabaskan Council, learn how warmer temperatures in the Arctic are transforming the landscape, triggering a host of effects such as permafrost thawing and insect infestations.

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Changing Views of Pluto

See images from the Hubble Space Telescope that show evidence of seasons on Pluto, in this video adapted from NASA.

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Characteristics of the Sun

This video segment adapted from NASA describes the basic characteristics of our star, the Sun.

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Chasing Beetles, Finding Darwin

In this video from KQED's QUEST, find out how Darwin's ideas remain as central to scientific exploration as when they were first published 150 years ago.

Chasing Tornadoes

In this video segment adapted from NOVA, scientists are on the hunt for tornadoes. Using Doppler radar, they gather data in the hopes of solving the mystery of how tornadoes form.

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