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RESOURCE	GRADE LEVEL	MEDIA TYPE
100's Day What does 100 look like? Sound like? Feel like? In this video from Curious George, explore the many ways to measure 100 things. Accessibility features: Caption	K-2	Video
3D Space: Illusion or Reality? This video excerpt from NOVA’s "The Fabric of the Cosmos: What Is Space?" reveals new data about black holes that has led to a new idea about the universe: Instead of everything being a three-dimensional object, it’s possible that everything is actually just a hologram. Accessibility features: Caption, Transcript	9-12	Video
Accidental Discoveries This segment from Swift: Eyes through Time traces the history military officers and engineers discovering a strange phenomenon in the sky that astronomers now know are gamma-ray bursts. Accessibility features: Caption	5-8	Video
Acids and Bases: Cabbage Juice Indicator In this video segment, the ZOOM cast demonstrates how to use cabbage juice to find out if a solution is an acid or a base. Accessibility features: Caption	3-8	Video
Acids and Bases: Making a Film Canister Rocket In this video segment, ZOOM cast members mix different amounts of baking soda and vinegar to see which combination produces the most carbon dioxide for launching a film-canister rocket. Accessibility features: Caption	K-5	Video
Acids and Bases: Testing Rocket Cars In this ZOOM video segment, cast members make bottle rocket cars using lemon juice and baking soda, and experiment with different ways of launching the cars. Accessibility features: Caption	3-8	Video
Acids and Bases: Testing Rockets What happens when you mix baking soda and lemon juice? Watch the ZOOM cast launch a rocket using kitchen chemistry. Accessibility features: Caption	3-8	Video
Air Power: Experimenting with Balloons In this video segment adapted from ZOOM, cast members experiment with the amount of air expelled first from a balloon, then through a straw attached to it, and see how both affect a balloon's behavior. Accessibility features: Caption	3-8	Video
Air Power: Making a Hovercraft In this video segment adapted from ZOOM, cast members make their own hovercraft and demonstrate how the air leaking out of a balloon can make a plastic plate hover above a table. Accessibility features: Caption, Transcript	K-8	Video
Arch Bridge This video segment adapted from Building Big illustrates the strength of the arch in bridge design and construction. Accessibility features: Caption	3-12	Video
Astronomy Theories This video segment from Swift: Eyes through Time deals with the advancement of science through changing existing ideas, refuting outdated theories, and incorporating new findings. Accessibility features: Caption	5-8	Video
Atomic Arrangements in Solids This video/animation asks the question "So if the same molecules are in the solid, liquid, and vapor forms of water, why are their properties so different?" The properties of a material are affected not just by the kinds of atom in it, but also by how they are arranged, and how free they are to move around. Forms of carbon are introduced, from graphite to buckyballs. Accessibility features: Caption	6-12	Video
Atomic Structure of an Alloy Learn about the atomic structure of bronze, a copper alloy, in this video excerpt from NOVA: "Hunting the Elements." Accessibility features: Caption, Transcript	6-12	Video
Atoms: The Space Between This video segment adapted from A Science Odyssey takes a look at the scale of the atom and the tremendous amount of space between the electrons and the nucleus. If all this empty space exists in matter, how can any substance be solid? Accessibility features: Caption	6-12	Video
Balloon Brain: Designing a Helmet In this video segment adapted from ZOOM, cast members are challenged to design protective headgear for a water balloon using what they know about the properties of the materials available. Accessibility features: Caption, Transcript	K-8	Video
Basketball Physics In this video from DragonflyTV, Jai and Jonathan track, graph, and analyze the motion of basketball shots as they investigate what factors influence the accuracy of their game. Accessibility features: Caption	5-8	Video
Bend, Twist and Break: Beyond the Laboratory Dr. Chris Muhlstein explains that when scientists study fracture surfaces from controlled experiments to understand the resulting shapes and features, they can use their understanding to deduce what happened when they were not around to see the material fail or break. Further they can predict what will have to a larger or smaller piece of material under stress. This process is how scientists and engineers translate a lab experiment into a design for an airplane, bridge or even a bike frame. Accessibility features: Caption	6-12	Video
Bend, Twist and Break: Breaking Glass Dr. Chris Muhlstein explains that researchers learn about the scientific basis for failure of materials by running experiments in the lab, using a simple shape like a glass rod to calculate the strength of material and predict its failure. The same tests can be done at the micro and nano scale using tiny specimens. Students can run a similar experiment with a bar of chocolate. Accessibility features: Caption	6-12	Video
Bend, Twist and Break: Fracture Surfaces Dr. Chris Muhlstein explains that fracture surfaces can reveal how and why a material has failed. An image of a fracture surface has features or shapes that we can use to understand where a material failed and why. Scientists use an optical microscope or a scanning electron microscope to read a fracture surface at high magnifications, much like we read maps to find our way. Accessibility features: Caption	6-12	Video
Bend, Twist and Break: The Bridge Dr. Chris Muhlstein explains that the arrangement of atoms in a material determines the properties. He drops an iPod to illustrate how the arrangement of atoms can protect it from damage; he narrates footage of the collapse of the Tacoma Narrows Bridge in the 1940s to show how the deformation of materials can cause the collapse of a structure. Accessibility features: Caption	6-12	Video
A Boat That Floats In this video from Curious George, children build boats out of everyday materials and then predict and observe whether the boats sink or float. Accessibility features: Caption	K-2	Video
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. Accessibility features: Caption	6-12	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. Accessibility features: Caption	3-8	Video
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. Accessibility features: Caption	3-8	Video
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. Accessibility features: Caption	3-12	Video
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. Accessibility features: Caption	6-12	Video
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. Accessibility features: Caption	6-12	Video
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. Accessibility features: Caption	5-8	Video
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. Accessibility features: Caption	3-8	Video
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. Accessibility features: Caption	3-12	Video
The Chemistry of Makeup In this video from DragonflyTV, join Jazi and Danielle as they experiment with different combinations of everyday ingredients in order to create and test batches of lip gloss. Accessibility features: Caption	5-8	Video
Citigroup Skyscraper Design Problem This video segment adapted from Building Big looks at the challenges faced by structural engineer William LeMessurier in designing a new skyscraper and how he very closely averted disaster. Accessibility features: Caption	6-12	Video
Clean Coal? Explore the challenges facing the deployment of clean coal technology in this video segment adapted from FRONTLINE: "Heat." Accessibility features: Caption	6-12	Video
Clifton Suspension Bridge This video segment from Building Big illustrates the basic design principles of the Clifton Suspension Bridge in Bristol, England. Accessibility features: Caption	3-12	Video
Columns: Experimenting with Balloons Watch the ZOOM cast find out how many balloons filled with air and then with water are required to support the weight of a cast member. Accessibility features: Caption, Transcript	3-8	Video
Columns: Experimenting with Paper Cups In this video segment from ZOOM, the cast experiments to see if a bunch of paper cups covered by a piece of cardboard can support the weight of a cast member. Accessibility features: Caption, Transcript	3-8	Video
Columns: Finding the Strongest Shape In this video segment, members of the ZOOM cast experiment by bending and folding sheets of paper into various shapes to see which shape will support the weight of a heavy book. Accessibility features: Caption, Transcript	K-8	Video
Columns: Hillary's Neighborhood In this video segment from ZOOM, Hillary, from Randolph, MA, takes us on a tour of the columns in her neighborhood. Accessibility features: Caption, Transcript	K-8	Video
Converting to Biodiesel Meet a college student whose class project to turn cooking grease into diesel fuel resulted in converting bus fleets to biodiesel, in this video from Earth Island Institute's New Leaders Initiative. Accessibility features: Caption	5-12	Video
Cooking Cookies with Solar Power In this video segment adapted from ZOOM, two solar cookers are tested against a control to see which can cook a "s'more" faster. Accessibility features: Caption	K-8	Video
Counting Neutrons on the Moon Find out how scientists are using a neutron detector onboard a satellite to try to find water on the Moon in this video adapted from NASA. Accessibility features: Caption	9-12	Video
Defy Gravity! Balancing Balls on Air In this video segment adapted from ZOOM, cast members use a hair dryer to balance a ball in a stream of air, seemingly defying gravity. Accessibility features: Caption, Transcript	K-8	Video
Defy Gravity! Centripetal Force How can you keep a ball from falling out of a jar if the jar is upside down? Watch the ZOOM cast use centripetal force to meet this challenge. Accessibility features: Caption, Transcript	3-8	Video
Defy Gravity! Upside Down Ping Pong Ball In this video segment, the ZOOM cast is challenged to keep a ping pong ball in a funnel while the funnel is held upside down, seemingly defying gravity. Accessibility features: Caption	3-8	Video
Density and Buoyancy: Experimenting with Club Soda In this video segment adapted from ZOOM, the cast discovers that gas-filled bubbles act like life jackets for raisins, making them buoyant. Accessibility features: Caption, Transcript	K-8	Video
Density and Buoyancy: Making Eggs Float Why does an egg float in salt water? Learn about density and buoyancy in this video segment adapted from ZOOM. Accessibility features: Caption	K-8	Video
Density and Buoyancy: Mixing Hot and Cold Water Watch warm water float on top of cold water in this video segment adapted from ZOOM. Accessibility features: Caption, Transcript	K-8	Video
Density and Buoyancy: Pouring Air into Water This video segment adapted from ZOOM offers a clever demonstration of buoyancy by showing how to pour a cup of air into a cup filled with water. Accessibility features: Caption, Transcript	K-8	Video
Density and Buoyancy: Testing Liquids Will a grape float in oil? Will a metal nut sink in corn syrup? Watch as the ZOOM cast tests the buoyancy of a variety of liquids and objects. Accessibility features: Caption, Transcript	K-8	Video
The Deployable Energy Absorber Watch how engineers stage a crash to test a new helicopter safety design technology in this video from NASA. Accessibility features: Caption	9-12	Video
Designing a Paper Bridge In this video segment adapted from ZOOM, cast members make a bridge from a single piece of paper. Will it be strong enough to hold a hundred pennies? Accessibility features: Caption	3-8	Video
Designing a Puff Mobile The air you exhale can power a puff mobile. Watch as the ZOOM cast races their air-powered designs to see which design features are the most successful. Accessibility features: Caption, Transcript	K-5	Video
Designing a Roller Coaster This video adapted from DESIGN SQUAD profiles Chris Gray, a mechanical engineer who uses his knowledge of energy transfer to design roller coasters. Accessibility features: Caption	5-12	Video
Designing a Roller Coaster In this video segment adapted from ZOOM, the cast is challenged to design and test a roller coaster with loops, hills, and U-turns. Accessibility features: Caption	3-5	Video
Designing Balloon Cars Can the air in a balloon power a car? Watch students from Weston, Massachusetts, demonstrate their balloon car designs in this video adapted from ZOOM. Accessibility features: Caption, Transcript	3-8	Video
Designing Electric Circuits: Door Alarm In this video segment adapted from ZOOM, cast members design and build door alarms using a variety of materials, including aluminum foil, batteries, and buzzers. Accessibility features: Caption	3-8	Video
Designing Electric Circuits: Steadiness Tester In this video segment adapted from ZOOM, cast members discover that metal is a good conductor of electricity as they play the steadiness tester game. Accessibility features: Caption	3-5	Video
Designing Future Cities: Alternative Energy In this video segment adapted from ZOOM, visit a class as they design a city of the future that will use solar, wind, and water power to fuel its economy. Accessibility features: Caption, Transcript	3-8	Video
Designing the Citigroup Skyscraper This video segment adapted from Thinking Big, Building Small shows how a structural engineer overcame the challenge of building New York's Citigroup skyscraper over a church. Accessibility features: Caption, Transcript	3-8	Video
Design Squad: Sound In this video segment adapted from Design Squad—a PBS TV series featuring high school contestants tackling engineering challenges—learn about the fundamentals of sound as student teams create percussive and stringed instruments for a local band. Accessibility features: Caption	3-12	Video
Design Squad: Suspension Bridge In this video segment adapted from Design Squad—a PBS TV series featuring high school contestants tackling engineering challenges—students employ the concepts of tension and compression to build a suspension bridge without the aid of power tools. Accessibility features: Caption	5-12	Video
Design Squad: Truss Bridge In this video segment adapted from Design Squad—a PBS TV series featuring high school contestants tackling engineering challenges—students employ the concepts of tension and compression as they build a truss bridge without the aid of power tools. Accessibility features: Caption	5-12	Video
Detecting Life on Other Planets In this video from NOVA scienceNOW, learn how scientists detect potential signs of life on distant planets. Accessibility features: Caption	6-12	Video
Developing the Periodic Table This video excerpt from NOVA: "Hunting the Elements" looks at how early chemists developed the periodic table of elements. Accessibility features: Caption, Transcript	6-12	Video
Do Materials Get Tired? Creep This video explains that materials will deform slowly or “creep” under the right conditions, when constant force is applied. “Strain” is illustrated with rubber bands and we learn that engineers can calculate creep strain as a function of time. Accessibility features: Caption	6-12	Video
Do Materials Get Tired? Fatigue This video explains how the strength of a material can be measured in the laboratory and used to design structures, like bikes, airplanes, and even chairs. We see a controlled lab experiment that applies precise force to a paperclip until it breaks. Accessibility features: Caption	6-12	Video
Do Materials Get Tired? Intro This video explains matter is made up of atoms that dictate the properties of materials. Mechanical engineers measure the stress a material can take until it breaks. Their ultimate goal is to make a material that will repair itself. Accessibility features: Caption	6-12	Video
Don't Mess with Mercury Learn about the dangers of mercury in this short video from the U.S. Environmental Protection Agency. Accessibility features: Caption	3-12	Video
Down to the Core Challenge In this video from Design Squad Nation, kids design and build devices that can extract a core sample from a potato “asteroid.” They also learn how samples give NASA scientists insight into solar system objects. Accessibility features: Caption	4-8	Video
Einstein's Special Theory of Relativity What happens when you approach the speed of light? This video segment adapted from NOVA follows one of Albert Einstein's thought experiments and his quest to find the answer. Accessibility features: Caption	9-12	Video
Einstein's Thoughts on the Ether Do light waves travel through the ether like waves on a lake travel through water? In this video segment adapted from NOVA, a young Albert Einstein grapples with this question while examining the speed of light. Accessibility features: Caption	6-12	Video
Electric Girl Anna loves electricity. Watch her construct a homemade flashlight and show off her new, electrifying hairdo in this video segment from ZOOM. Accessibility features: Caption	3-8	Video
Electricity This video segment from IdahoPTV's D4K explains some electrical vocabulary and follows the route of electricity from its generation to the home. Accessibility features: Caption, Transcript	4-6	Video
The Electromagnetic Spectrum: FRONTLINE This video segment adapted from FRONTLINE introduces the electromagnetic spectrum and explains how the various types of electromagnetic waves are distinguished by the amount of energy each wave carries. Accessibility features: Caption	6-12	Video
The Electromagnetic Spectrum: NASA From radio waves to gamma rays, this video segment from NASA introduces the seven categories of the electromagnetic spectrum and how each type of radiation is part of our everyday lives. Accessibility features: Caption	3-12	Video
Electrophoresis and Gel Analysis In this animation produced by WGBH and Digizyme, Inc., see how molecules of DNA are separated using gel electrophoresis, and how this process enables scientists to compare the molecular variations of two or more DNA samples. Accessibility features: Caption	9-12	Video
The Elements: Forged in Stars The story of how elements from lithium to uranium are created by stars is illustrated through animation and a hands-on periodic table in this video segment adapted from NOVA. Accessibility features: Caption	6-12	Video
Energy Sources This video segment illustrates a variety of energy sources used to generate electricity, some of which are in use and some of which are under exploration. Accessibility features: Caption	3-12	Video
Energy Transfer in a Trebuchet On NOVA, a team of carpenters, timber framers, engineers, and historians recreate a medieval throwing machine called a trebuchet. This adapted video segment explores how understanding energy transfer informs their design. Accessibility features: Caption	6-12	Video
Engineering Biofuels In this video segment adapted from KQED's QUEST, find out how synthetic biologists use the techniques of metabolic engineering and directed evolution to make more effective biofuels. Accessibility features: Caption	9-12	Video
Ethanol Biofuel In this video segment adapted from NOVA, learn about one scientist's idea for using biotechnology to make ethanol a more efficient alternative to gasoline. Accessibility features: Caption	9-12	Video
Everyday Radiation How much radiation are we exposed to every day? Find out in this video segment adapted from FRONTLINE. Accessibility features: Caption	6-12	Video
Experimenting with a Glass Xylophone In this video segment adapted from ZOOM, the cast investigates how the pitch of sound changes when they strike a variety of glasses filled with different amounts and types of liquids. Accessibility features: Caption	3-8	Video
Experimenting with a Lemon Battery Can a fresh lemon power a digital clock? In this video segment adapted from ZOOM, the cast shows you how this can be done and, in the process, discover how kids can be a part of an electric circuit. Accessibility features: Caption	3-8	Video
Experimenting with a Pendulum In this video segment, members of the ZOOM cast experiment with a pendulum and discover what they need to do to make the pendulum complete one back-and-forth swing in five seconds. Accessibility features: Caption	3-8	Video
Exploring Conductivity: Kid Circuits In this video segment adapted from ZOOM, cast members join hands and become electron conductors to complete an electric circuit. Accessibility features: Caption	3-8	Video
Exploring Windmill Design In this video segment adapted from ZOOM, cast members are challenged to design a windmill that can be powered by a hair dryer. Accessibility features: Caption	3-8	Video
Extreme Sounds Join Tarissa and Sabrina as they measure and compare the volume of different sounds across New York City in this video from DragonflyTV. Accessibility features: Caption	3-8	Video
Feel the Beat In this video from Curious George, young children learn about pitch by playing a variety of drums. One hearing-impaired child experiences the different sounds through her hands instead of her ears. Accessibility features: Caption	K-2	Video
Fireworks! Lifting Charge In this video segment adapted from NOVA, learn how pyrotechnicians use common compounds to blast fireworks into the sky and give them shape. Accessibility features: Caption	6-12	Video
Fireworks! Making Color What gives a fireworks display its brilliant blue, green, and red colors? Learn how pyrotechnicians give fireworks color in this video segment adapted from NOVA. Accessibility features: Caption	6-12	Video
Firth of Forth Cantilever Bridge This video segment from Building Big: "Bridges" demonstrates the basic design of a cantilever bridge by looking at Scotland's Firth of Forth Railway Bridge. Accessibility features: Caption	3-12	Video
A Fission Chain Reaction This video excerpt from NOVA: "Hunting the Elements” uses ping-pong balls and mousetraps to demonstrate nuclear fission. Accessibility features: Caption, Transcript	6-12	Video
Flight This video segment from IdahoPTV's D4K takes you on a flight with a young student and a pilot as you learn about the 4 aerodynamic forces which are present when air is moving past an object such as an airplane. Accessibility features: Caption, Transcript	4-6	Video
Force and Motion This video segment from IdahoPTV's D4K explains and gives examples of Sir Isaac Newton's 3 Laws of Motion using the rides at an amusement part. Accessibility features: Caption, Transcript	4-6	Video
Fracking In this video segment adapted from Need to Know, learn about the controversial method of extracting natural gas known as hydraulic fracturing, or fracking, and how some residents who live near drill sites are concerned that it's polluting their water. Accessibility features: Caption	9-12	Video
Fracture Surfaces of Paperclips This video features a Penn State University professor, Dr. Chris Muhlstein, who explains that the fracture surface of a paper clip is a map of how it failed, to a trained eye. He invites us to view a variety of surfaces with a virtual microscope. Accessibility features: Caption	6-12	Video
Franklin Chang-Díaz: Rocket Scientist This video segment adapted from NOVA scienceNOW profiles Franklin Chang-Díaz, a scientist who is working on plasma-powered rockets and was NASA's first Latin American astronaut. Accessibility features: Caption	6-12	Video
Fuel Cells In this video segment adapted from NOVA scienceNOW, hydrogen fuel cell cars promise pollution-free driving, but will we see them anytime soon? Accessibility features: Caption	6-12	Video
Funny Boat In this video segment adapted from FETCH!™, contestants are challenged to use materials from a garbage dump to build a boat that floats, can be steered, and is propelled by something other than oars. Accessibility features: Caption	3-8	Video