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Library of 3383 accessible STEM media resources.
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In a decade dominated by the Great Depression, the inventors of the 1930s were desperately trying to make a living. They come up with some simple yet ingenious inventions that are still practical necessities in our fast-paced life. Featured inventions include: the helicopter, xerography, the parking meter, the walkie talkie, and the electric guitar.
(Source: DCMP)
Students learn the fundamental concepts of electrical energy. Easy-to-understand animations illustrate the concepts of electric charge and electric current. Static electricity and the role it plays in creating lightning is also described. Important terminology includes protons, electrons, repel, attract, charges, charged objects, electrical discharge, electric field, and electric force.
Students explore electric current and the role it plays in electrical circuits. They also compare parallel and series circuits. The video concludes by demonstrating some fundamental concepts of electrical safety. Other important terminology includes resistance, switch, fuse, circuit breaker, short circuit, ground prong, and electric potential difference.
Part of the "A 3-D Demonstration" series. Looks at physics principles behind AC and DC generators. Examines the relationship between a changing magnetic field and the induction of electric current. A hand rule is introduced to predict the generator effect in a linear length of conductor exposed to a changing magnetic field. The behavior of a rotating coil in a magnetic field leads to the practical construction of an AC motor. Introduces split-ring commutator generators, as well as the more common alternator as a means of generating DC electricity. Specific modules include Generating Electricity, Inductors, Generator Left-Hand Rule, Generator Electromotive Rule, AC Generators, and DC Generators. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).
Part of the "A 3-D Demonstration" series. Explores the basic principles behind the operation of AC and DC motors. Explains how one or more fixed magnets, either permanent or electromagnetic, can cause linear movement or rotation of a current-carrying wire. A hand rule is developed to predict motor force. Motor torque is explained as a prelude to the practical design of a direct current motor. Specific modules include Motors and Magnets, Current and Magnet Interaction, Left-Hand Rule, Motor Force, Motor Torque, and DC Motors. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).
Host Lisa Van Pay visits the scientists and engineers working to make the electric car of the future a reality today. One of the toughest parts is storing enough potential energy in the battery. Graduate student Katharine Stroukoff from the University of Texas-Austin explains how her research may help build a better battery, while Mike Nawrot and Dan Lauber, members of the MIT electric vehicle team, describe the advantages of their fully electric Porsche 914.
Students explore the many important uses of electricity. The nature of electricity and the formation of electric current are highlighted. Special attention is given to safety and electricity. Concepts and terminology include charge, current, lightning, battery, generator, and wiring.
Part of the "A 3-D Demonstration" series. Explores how electric energy became an essential tool with the advent of electricity storage, allowing the flow of current to do useful work. Defines and examines conductors, insulators, voltage, and current, using a water flow model to help ensure understanding. Explains the difference between electron flow and current flow models. Also develops the nature of direct and alternating current (both one- and two-phase). Specific modules include Tapping a Source, Conductors and Insulators, Direction of Flow, Potential Difference, Measuring Voltage, Measuring Current, Alternating Current, and AC Voltage. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).
Presents three key concepts of science: static electricity, magnetism, and generating electricity. Each concept is illustrated with a variety of experiments and computer animation to illuminate what is happening both visibly and at the molecular level.
Grab a balloon to explore concepts of static electricity such as charge transfer, attraction, repulsion, and induced charge.
(Source: PhET Interactive Simulations)
Electricity makes life easier every day. Because electricity is virtually unseen, it is often difficult to understand just where it comes from and how it works. Students will discover the properties of electricity and what is needed to keep the lights on. Part of the Real World Science series.
What is electricity and how is it made? What kinds are there? What are circuits and switches? Is electricity dangerous? Answers these questions with easy-to-duplicate experiments.
An electric eel can generate enough current to stun its prey. Johns Hopkins University neuroethologist Eric Fortune traveled to Ecuador to study electric knifefish in their native habitat. Back at Johns Hopkins University, research collaborator mechanical engineer Noah Cowan and the rest of the team use Fortune's field data to help with their observations and experiments in the lab. With support from the National Science Foundation, they are studying the knifefish to learn more about how the brains of animals work to control their behavior.
A lit up lamp is the end of an electrical circuit. How is energy produced? How is it distributed? A team traces the path of electricity from the power plant to its place of consumption. Part of Invisible Science and Technology Surrounding Series.
Explore the dynamic work environment of an electrical engineer who oversees large industrial projects. Watch as engineers interact with one another and use cutting-edge 3-D modeling. Learn how to become a licensed professional engineer. Part of the "Career Connections" series.
Revolutionary technologies now make it possible to harness a completely renewable energy resource-the natural power of the sea. Explores ways that electric power can be drawn from tidal forces or from fluctuations in ocean currents. Highlights several innovations, including a tide-driven rotor off the coast of Cornwall in the United Kingdom, a multi-rotor locks system in the English Channel, an OTEC (i.e., ocean-thermal energy conversion plant) in southern Japan, and another OTEC facility in Hawaii. Commentary from the inventors, designers, and managers of these systems is included along with animation that illustrates how each mechanism works.
Functional electrical stimulation technology (FES) is designed to interface technology with muscles and nerves in an attempt to restore some level of function for people with central nervous system disabilities. Visits several experimental programs that are using implanted electrodes, controlled by external computer devices, to enable people with spinal cord injuries to stand, transfer, and, under controlled conditions, even walk.
In this episode, the researchers in the A to Z Career Lab investigate the roles and responsibilities of electricians. Individuals in this profession specialize in electrical wiring of buildings. Part of the "I Can Be Anything I Want to Be A to Z" series.
Investigates some of the key concepts of physics. Using a drum kit, we look at how sound works, how we make it, and how it gets around. Also, examines electricity and electromagnetism and notes the similarities between a remote control car and a mobile phone charger. Finally, takes a look at radioactivity and identifies a radioactive device that can be found in almost every family home.
Part of the "A 3-D Demonstration" series. Traces the relationship between magnetism and electricity from the first accidental discovery of induced current. Introduces the concepts of electric and magnetic fields and explores their representation. Examines the features of coils and solenoids to develop the construction of practical electromechanical devices, such as solenoid switches and electromagnets. Also introduces hand rules to help determine the alignment of currents and fields. Specific modules include Electric Fields, Magnetism, Magnetic Fields, Electromagnetism, Left-Hand Rule, Electric Coils, Solenoids, Solenoid Switches, and Electromagnets. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).
Showing collections 1 to 3 of 3
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
Biology related concepts
A collection containing 59 resources, curated by Benetech
