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RESOURCE	GRADE LEVEL	MEDIA TYPE
AC / DC: What's the Difference? This animated essay from the American Experience Web site explains the difference between alternating and direct electric current and offers in-depth explanations about the role played by a battery, light bulb, wire, and generator.	6-12	Interactive
Acids and Bases: Kitchen Chemistry In this interactive activity from the ZOOM Web site, search for chemistry clues and experiment with acids and bases in a virtual kitchen.	3-8	Interactive
Aerodynamics: What Causes Lift? How does an airplane stay aloft when upside down? This media-rich essay from the NOVA Web site offers an explanation based on Newton's third law of motion.	6-12	Interactive
Airplanes: Designing for Stealth Explore this NOVA interactive activity to see how engineers have modified a military plane's sound, shape, and heat emissions to minimize detection.	6-12	Interactive
Amplitude This interactive activity adapted from the University of Utah's ASPIRE Lab shows how a pendulum's amplitude changes as you set it swinging from different distances from its axis, and how the amplitude of a sound wave changes as you adjust the volume.	6-12	Interactive
Anatomy of a Firework There's more to a fireworks display than meets the eye. This interactive activity from the NOVA Web site looks at the technology behind each burst of light.	6-12	Interactive
Astronomical Images in Different Wavelengths Visible light is just one portion of the electromagnetic spectrum that a telescope may detect. This collection of images produced for Teachers' Domain features radio wave, infrared, visible light, and X-ray images of distant stars and galaxies as well as images of the telescopes designed to detect the various wavelengths of radiation.	6-12	Interactive
The Atom In this interactive activity from ChemThink, take a closer look at atomic structure, properties, and behaviors.	6-12	Interactive
Atom Builder Build a carbon atom out of up quarks, down quarks, and electrons in this interactive activity from the NOVA Web site.	6-12	Interactive
Bandwidth and Data Conversion This interactive activity adapted from the Wisconsin Online Resource Center describes the factors that affect the speed of data transfer in computer networking systems and some of the techniques used to increase the data capacity of these systems.	9-12	Interactive
Bear Creek Wind Farm Tour In this interactive, a construction project manager explains the process of constructing a wind farm, its challenges and benefits.	9-12	Interactive
Birth of a Supernova, Type Ia In this interactive activity from NOVA Online, learn about a type of exploding star — a Type Ia supernova — that is so bright that astronomers can measure the distance to the galaxy in which it resides, and even learn which elements make up the star.	6-12	Interactive
Birth of a Supernova, Type II In this interactive activity from NOVA Online, learn about a type of exploding star — a Type II supernova — that is so large it has a mass 10 times greater than the mass of our Sun.	6-12	Interactive
The Bridge Challenge In this interactive activity from the Building Big Web site, use your knowledge of bridge design to match the right bridge to the right location in a fictitious city.	3-12	Interactive
Build a Bridge Survey potential bridge sites, research bridge design, and select the right bridge for the right location in this interactive activity from the NOVA Web site.	6-12	Interactive
Build a Steroid In this interactive activity from NOVA, learn about the molecular structure of steroids. See the intermediate molecules that are part of the pathway for synthesizing cortisone from diosgenin.	9-12	Interactive
Buoyancy Brainteasers: Balloon-in-Car Puzzler This interactive brainteaser from the NOVA Web site challenges you to explain the behavior of a helium-filled balloon in a moving car.	3-8	Interactive
Buoyancy Brainteasers: Boat-in-Pool Puzzler This interactive brainteaser from the NOVA Web site challenges you to figure out what happens to the water level when a rock is resting in a boat and when it is submerged in water.	3-8	Interactive
Buoyancy Brainteasers: Buoyancy Question This interactive brainteaser from the NOVA Web site challenges you to figure out what causes an object to sink.	3-8	Interactive
Centripetal Force: Pulling Cs and Gs In this interactive activity from NOVA, discover how centripetal force can affect you when riding in a car or flying at high speeds in a fighter jet.	3-8	Interactive
Chemical Bonds This interactive activity developed for Teachers' Domain demonstrates how attractive forces between atoms create chemical bonds, resulting in the formation of molecules and compounds.	9-12	Interactive
Circular Motion In this interactive activity featuring videos adapted from the Rutgers PAER Group, observe examples of circular motion. Can you find a common reason why the objects and people presented move in a circle?	6-12	Interactive
Collisions on an Air Track In this interactive activity adapted from the University of Toronto, observe the effect of mass on momentum in elastic and inelastic collisions.	9-12	Interactive
Construct an Aqueduct Think like an engineer and build an aqueduct in this interactive activity from the NOVA Web site.	3-12	Interactive
Cooking with Sugar Find out about the chemistry of candy and how sugar reacts at different temperatures to become fudge, caramel, lollipops, and more in this interactive activity adapted from the Exploratorium.	5-8	Interactive
Covalent Bonding This interactive activity from ChemThink takes a closer look at a covalent bond—how it is formed and how the sharing of two electrons can keep atoms together.	9-12	Interactive
Cow's Eye Dissection In this interactive activity adapted from the Exploratorium, watch videos of a cow eye dissection and see how an eye works.	6-12	Interactive
The Dam Challenge In this interactive activity from the Building Big Web site, investigate dams in distress and decide if they should be repaired, removed, or left alone.	3-12	Interactive
De-Twinkling the Stars Find out why stars twinkle and adjust a telescope to sharpen a star's image in this interactive activity adapted from NASA.	9-12	Interactive
Design a Liquid Fuel Rocket Engine Learn about rocket engines, and then design and launch a liquid fuel rocket in this interactive activity adapted from NASA.	9-12	Interactive
Design an Ion Engine Learn about ions and then design an ion engine to maximize thrust in this interactive activity adapted from NASA.	9-12	Interactive
Design: Building a House This collection of images follows the process of building a house from cutting the trees and making the bricks to finishing construction.	K-8	Interactive
Disappearing Milk A magician pours milk into a glass, but when he turns the glass upside down, nothing comes out. How does he do it? Discover the science behind the "magic" in this video adapted from the American Society of Mechanical Engineers.	4-12	Interactive
Dissolving Salts in Water In this interactive activity adapted from Iowa State University, design and carry out an experiment: dissolve salts in water, see how different ionic compounds produce different reactions, and observe the resulting changes in temperature.	8-12	Interactive
The Dome Challenge In this interactive activity from the Building Big Web site, think like an engineer and use your knowledge of dome design to match the right type of dome to the right location in a fictitious city.	3-12	Interactive
Dust Explosion In these videos adapted from the Journal of Chemical Education, observe how a material that is usually hard to ignite becomes very flammable when its particles are suspended in air.	6-12	Interactive
Electric Charges Interact Experiment with electric charges to find out how they interact in this interactive activity adapted from NASA.	6-12	Interactive
Elements of Steel This resource from the AMERICAN EXPERIENCE Web site, which contains both an interactive activity and illustrated text, looks at the composition of different types of steel and their impact on technology.	6-12	Interactive
Energy in a Roller Coaster Ride See potential energy convert to kinetic energy in this interactive activity from WGBH that shows a roller coaster in action.	3-12	Interactive
Floating and Sinking: Hot Air Balloons Why do hot air balloons float? This resource from the NOVA Web site offers a series of interactive activities that illustrates the physics of hot air balloons.	6-12	Interactive
Forces Lab In this interactive activity from the Building Big Web site, select one of the actions of squeezing, stretching, bending, sliding, or twisting to explore the forces of compression, tension, shear, and torsion.	3-8	Interactive
Frames of Reference Explore how different frames of reference affect your perception of motion in this interactive activity from the American Museum of Natural History.	9-12	Interactive
Free-Falling and "Weightlessness" Discover the difference between free-falling and weightlessness in this interactive activity from the NOVA Web site.	6-12	Interactive
Frequency In this interactive activity adapted from the University of Utah's ASPIRE Lab, investigate frequency in terms of trampoline jumps, pendulum swings, and electromagnetic waves.	6-12	Interactive
Galileo: His Experiments This interactive activity from the NOVA Web site samples Galileo's experiments with falling objects, projectiles, inclined planes, and pendulums.	6-12	Interactive
Gas Properties In this interactive simulation adapted from University of Colorado’s Physics Education Technology project, change parameters and discover how the properties of a gas vary in relation to each other.	6-12	Interactive
Generating Electrical Voltage This interactive resource adapted from the Wisconsin Online Resource Center illustrates how electrical voltage is generated through a process called magnetic induction and describes some of the factors that affect the magnitude of the voltage produced.	9-12	Interactive
Generation of Alternating Current This interactive resource adapted from the Wisconsin Online Resource Center illustrates the parts of an electrical generator and shows how they function to produce alternating current.	9-12	Interactive
Geometric Optics This interactive simulation adapted from the University of Colorado's Physics Education Technology project illustrates how lenses refract light to form images. Manipulate the object, screen, lens, and focal length and observe how the image adjusts.	6-12	Interactive
Getting Airborne and Wing Design What makes an airplane fly? Discover the connection between Newton's third law of motion and flight in this interactive activity from the NOVA Web site.	6-12	Interactive
GPS: Where in the World Are You? This interactive activity produced for Teachers' Domain illustrates the concepts and technologies that enable the Global Positioning System (GPS) to identify a person's location within a range of a few meters.	9-12	Interactive
Graphing the Periodic Table This interactive activity from the American Chemical Society presents the properties and electron configurations for all the elements in the periodic table. Discover patterns by plotting the elements' properties according to their place in the table.	9-12	Interactive
Heat Transfer In this interactive activity adapted from the Wisconsin Online Resource Center, learn how heat can be transferred in one of three ways: conduction, convection, and radiation.	5-12	Interactive
History of the Universe This interactive timeline from the NOVA Web site recaps the theoretical origin and formation of the universe, and forecasts its eventual fate.	6-12	Interactive
How Is a Radio Wave Emitted? This illustrated essay from A Science Odyssey Web site explains the science behind radio waves, including the role of electrons and electromagnetic fields.	6-12	Interactive
Imaging with Radar This interactive activity from NOVA features synthetic aperture radar (SAR), which uses radio waves to create high-quality images. Examine SAR images of Washington, D.C., and learn about this technology's unique advantages.	6-12	Interactive
Infrared Gallery How would your world look if you saw heat instead of light? In this interactive resource produced for Teachers' Domain, see what familiar objects look like through an infrared camera and watch infrared videos of geysers, mudpots, and hot springs.	3-12	Interactive
Inside a Solar Cell This interactive activity adapted from NOVA Online features animations that illustrate the components of a typical photovoltaic cell and how it converts solar energy into electricity.	9-12	Interactive
Inverse Square Law This animation from KET's distance learning physics course demonstrates the mathematical formula for a scientific law as it applies to light.	6-12	Interactive
Ionic Bonding In this interactive activity from ChemThink, learn how ionic bonds are formed and how an ionic bond structure is represented by its formula.	9-12	Interactive
James Webb vs Hubble Compare two space telescopes—the Hubble Space Telescope and its planned successor, the James Webb Space Telescope —in this interactive activity from NASA.	7-12	Interactive
Let's Build Something Interactive Children learn about the types of machines on a construction site and the different jobs they do to help us build in this original interactive from KET.	Pre-K-2	Interactive
Lever an Obelisk Investigate the mechanical advantage of the lever in this interactive activity from the NOVA Web site.	6-12	Interactive
Lift and Drag In this interactive activity from NOVA, learn about the aerodynamic forces of lift and drag and how critical they are to the operation of all sorts of devices.	6-12	Interactive
The Light Stuff This interactive activity from the NOVA Web site asks which items in your home can slow down the speed of light.	6-12	Interactive
Light Wave Behaviors Discover the ways light interacts with objects in this interactive activity adapted from NASA.	9-12	Interactive
Loads Lab This interactive activity from the Building Big Web site examines different types of loads and how structures might be reinforced to withstand them.	3-8	Interactive
Masses and Springs In this interactive simulation adapted from the University of Colorado's Physics Education Technology project, hang various masses from different springs and see the kinetic, potential, and thermal energy of each spring system. You can even slow time or move your demonstration to another planet.	6-12	Interactive
Materials Lab This interactive activity from the Building Big Web site explores the properties of different types of building materials.	3-12	Interactive
Metals in Hydrochloric Acid In this interactive activity adapted from Iowa State University, observe how hydrochloric acid dissolves some metals to form oxidized metal chlorides and hydrogen gas.	9-12	Interactive
The Michelson Interferometer Learn about an important physics experiment that uses an invention that manipulates light in this interactive activity adapted from NASA.	9-12	Interactive
Mixing Colors Interactive Children learn the basics of mixing primary colors in this original interactive.	Pre-K-1	Interactive
Molecular Shapes In this interactive activity from ChemThink, learn about covalent molecules and how the VSEPR theory predicts the shapes of covalently-bonded molecules.	9-12	Interactive
Momentum In this interactive activity adapted from Wake Forest University, observe the effect of mass on velocity and momentum in elastic and inelastic collisions.	8-12	Interactive
Name That Shell The way a firework shell is designed and assembled determines the shape and color of a firework display. Choose a video clip and try to identify each firework variety in this interactive activity from the NOVA Web site.	6-12	Interactive
Nature's Pharmacy In this interactive activity from NOVA, learn about chemicals in nature that are used in medicine.	3-12	Interactive
New Ways to Catch Rays This interactive resource adapted from NOVA Online explores eight of the latest technological developments designed to harness the energy of the Sun.	9-12	Interactive
NOVA Elements Explore the periodic table, and build atoms and molecules in this web edition of the NOVA Elements iPad App.	6-12	Interactive
Ohm's Law In this interactive simulation of Ohm’s law, adapted from the University of Colorado's Physics Education Technology project, adjust the voltage and resistance in a circuit, and observe how this affects the flow of current.	3-12	Interactive
On Fire Learn about the chemical reactions that take place when things burn in this interactive activity from the NOVA Web site.	6-12	Interactive
Particulate Nature of Matter In this interactive activity from ChemThink, examine the basic properties of matter at an atomic level and consider how various atoms affect the way a substance behaves.	6-12	Interactive
Penn State University Combustion Lab Tour In this video, a fuels science professor tours a Combustion Lab where a team is investigating renewable, advanced and clean burning fuels. Overall, the researchers are interested in power, emissions, and performance.	9-12	Interactive
Periodic Table of the Elements This interactive periodic table developed for Teachers' Domain provides detailed information about the chemical properties of elements and illustrates the electron configurations that determine those characteristics.	6-12	Interactive
Physics of Arches In this interactive activity from NOVA, try your hand at constructing a stone arch and learn about the physics that affect the arch.	7-12	Interactive
Primary Colors of Light and Pigments In this interactive activity adapted from Shedding Light on Science, discover the difference between the primary colors of light and the primary colors of pigment—and the connection between the two.	6-12	Interactive
Projectile Motion In this interactive simulation adapted from University of Colorado’s Physics Education Technology project, learn about projectile motion by firing various objects from a virtual cannon into the air. Experiment with the settings and try to hit a target.	6-12	Interactive
Pyrotechnics: It's Elemental In this interactive periodic table from the NOVA Web site, find out the role of various elements in making fireworks.	6-12	Interactive
Radio Transmission This interactive activity from A Science Odyssey tracks the journey of a sound wave from the moment a musician sings into a microphone until his voice reaches the vibrating speakers of an AM Radio.	6-12	Interactive
Radio Waves & Electromagnetic Fields In this interactive simulation adapted from the University of Colorado's Physics Education Technology project, explore how a radio transmitter broadcasts electromagnetic radiation.	6-12	Interactive
Radio Waves: FM vs. AM This brief essay from A Science Odyssey Web site describes the difference between FM and AM radio waves.	6-12	Interactive
$Refraction of Light Demonstration$ Refraction of Light Demonstration In this interactive activity featuring videos adapted from the Rutgers PAER Group, observe how light bends when it travels through a convex lens, a concave lens, and glass.	5-12	Interactive
Ringed-Carbon Compounds In this interactive activity adapted from NOVA, learn about alkaloids and steroids, both examples of compounds with carbon rings. Short videos with interviews, animations, and photographs are featured.	9-12	Interactive
Rotations in Space Learn about rotational forces by watching astronaut Jeffrey Williams spin objects onboard the International Space Station in this interactive activity adapted from NASA.	9-12	Interactive
Scientific Processes In this interactive activity adapted from NOVA, expand your understanding of the scientific process. Watch two videos featuring animations and interviews with scientists, and notice how the processes unfold and vary from one investigation to the other.	9-12	Interactive
Shapes Lab This interactive activity from the Building Big Web site compares the strengths of the rectangle, triangle, and arch.	3-8	Interactive
The Skyscraper Challenge In this interactive activity from the Building Big Web site, investigate hypothetical structural emergencies and figure out how to repair them.	3-12	Interactive
Snowflake Physics Explore the science behind snowflake formation by examining water molecule structure and other conditions that affect snowflake growth in this interactive activity adapted from SnowCrystals.com.	6-12	Interactive
Sound This interactive simulation, adapted from the University of Colorado's Physics Education Technology project, illustrates sound waves. Adjust the frequency and amplitude to see and hear how the waves change.	6-12	Interactive
Sound Waves Underwater: True or False This interactive quiz from the NOVA Web site features an array of interesting facts about the nature of sound underwater.	3-12	Interactive
Sources of Radiation This interactive activity from the NOVA Web site explores sources of radiation, both harmful and beneficial, natural and manmade.	6-12	Interactive