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What does a mirror tell us about light? Illustrates 11 computer-animated video units for one aspect of light's behavior-reflection. Euclid's geometric optics and his findings on the perception of distance and perspective lead to a discussion of the Law of Reflection, linking angle of incidence with angle of reflection, and the concepts of absorption, transmission, and diffuse reflection. Explains the principles involved with plane, concave, and convex mirrors, including vertex, principle axis, center of curvature, radius of curvature, and virtual image. Shows a group of "mirror equations" how an object's location can be determined by using the laws of reflection.
(Source: DCMP)
New discoveries regarding the Outer Planets are creating a fundamental rethinking of our solar system. Uranus is a toxic combination of hydrogen, helium and methane. Scientists speculate that the planet was knocked on its side after colliding with another body. Neptune's largest moon, Triton, is cold and barren, but some scientists speculate that liquid water might exist under Triton's icy surface. Cold and inhospitable, Pluto completes one orbit around the solar system every 248 years. Cutting-edge computer graphics are used to bring the universe down to earth to show what life would be like on other planets, and to imagine what kind of life forms might evolve in alien atmospheres.
The Hawaiian bobtail squid and its resident bacterium, Vibrio fischeri, have a powerful and still somewhat mysterious symbiotic relationship. The luminescent bacteria populate a small pouch on the squid’s underside called the light organ, and provide a sort of “Klingon cloaking device.” They produce light at night to offset the squid’s shadow and hide it from predators when it approaches the ocean’s surface to feed. At the University of Wisconsin-Madison, microbiologist Margaret McFall-Ngai studies this unusual relationship. An understanding of these creatures’ rhythms could lead to new ways to treat disease. She is also studying how the squid and bacteria communicate, so they don’t harm each other.
Chemist Paul Edmiston’s search for a new way to detect explosives at airports led to the creation Osorb. A swellable, organically-modified silica, or glass, capable of absorbing oil and other contaminants from water. Osorb has become the principal product of a company called ABSMaterials, where Edmiston is now chief scientist. With support from the National Science Foundation, Edmiston and his colleagues at ABSMaterials are developing water remediation technologies for cities and industries. ABSMaterials is creating formulas to address various contaminants, including hydrocarbons, pharmaceuticals, pesticides, herbicides, chlorinated solvents, and endocrine disruptors. Part of the National Science Foundation Series “Science Nation.”
Explains how raptors (birds of prey) fly and hunt, comparing their abilities to those of high-tech fighter aircraft. The peregrine falcon, for example, surpasses even the F-22 Raptor aircraft in its speed, agility, and accuracy on target. Also studies eagles, kestrels, owls, vultures, falcons, and hawks. Focuses on the tactics of raptors hunts from hawks, taking advantage of bats' nighttime flights to hawks' teamwork in capturing their prey.
With support from the National Science Foundation, Liangfang Zhang and his team at UC-San Diego have created a nanosponge to combat drug-resistant infections, such as those caused by Methicillin-resistant Staphylococcus aureus (MRSA). The nanosponge, made from biocompatible, biodegradable polymer nanoparticles, is camouflaged with a red blood cell membrane. It circulates in the bloodstream, absorbing the toxins produced by infection. Once the nanosponges are fully loaded with toxins, they are safely disposed of by the liver. They are designed to work with any type of infection or poison that attacks the cellular membrane. Part of the National Science Foundation Series “Science Nation.”
With support from the National Science Foundation, computer scientists at the University of Illinois at Chicago are pushing science fiction closer to reality. They have created a wraparound virtual world in which a researcher wearing 3D glasses can take a walk through a human brain, fly over the surface of Mars, and more. In the system, known as CAVE2, an 8-foot-high screen encircles the viewer 320 degrees. A panorama of images springs from display panels, conveying a sense of being able to touch what's not really there. Part of the National Science Foundation Series “Science Nation.”
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko learns about water tables and how streams develop. During the dry season, the river level drops and the remaining water turns to mud. He can't swim or drink the water. A man with a strange stick points the stick to the ground, and when Moko digs down there, water gushes out! Moko learns that even if no rain falls, Mother Earth could still be generous if you know the right way to ask her.
The fourth in a series of five documentaries focuses on the omnipresence of spirituality in the Greater Mekong. The values of prosperity, as they are enhanced by the Western World, are in complete opposition with the values of renouncement of material wealth commended by Buddhist philosophy. As a matter of fact, over 90 % of the population of the Greater Mekong is Buddhist. The region is full of temples and pagodas because the spirits, the gods and the demons too are part of everyday life. They are the heroes of all festive events. It is especially the dragon, a symbol of superhuman forces, of spirituality and supreme power that still lives in the heart of the festive traditions of this part of the world. Series: The Soul of Southeast Asia
The Center for Remote Sensing of Ice Sheets (CReSIS) is a Science and Technology Center established by the National Science Foundation (NSF) with the mission of developing new technologies and computer models to measure and predict the response of sea level change. CReSIS provides students and faculty with opportunities to pursue exciting research in a variety of disciplines; to collaborate with world-class scientists and engineers in the US and abroad; and to make meaningful contributions to the ongoing, urgent work of addressing the impact of climate change. Part of the National Science Foundation Series “Science Nation.”
David Stahle travels to ancient forests around the world, collecting tree rings to learn more about major climate and historical events dating back hundreds and thousands of years. With help from the National Science Foundation, he uses dendrochronology, or tree-ring dating, to get a snapshot of climate change over time. Stahle runs the Tree-ring Lab at the University of Arkansas, where he and fellow tree-ring researchers are learning that a trend of global warming began in the 1800s and continues today, brought about by changes in tropical sea surface temperatures of no more than a few tenths of a degree Celsius. Today Stahle is working with hydrologists and government planners in California and throughout Mexico to plan for drought and climate change events.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko bids farewell to Totemie. As promised, he gives Mei Li's stone and Alarick's flute. She in turn gives him a present that he may only open when he arrives at his destination. One morning, he sees the coast of his land after battling through a tornado! When he gets to shore, he opens Totemie's gift and finds not only her bracelet, but also Mei-Lei's stone and Alarick's flute and realizes that the greatest gift has been meeting his new friends.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko had gone to see his friend, the wise old man who lives on the other side of the village. There were such pretty flowers that Moko could spend the entire day contemplating them. The old man picked a beautiful rose and handed it to Moko. But on the way back, the sun was so hot that the flower began to wilt. Moko was so sad that he laid the withered rose on the ground and started to cry. The wind rose, sweeping across the ground. Moko then saw that his rose was still there, more beautiful than ever and sparkling, its petals solid as stone. It had become a desert rose, as rare as water in the desert.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, on this morning, Moko is rowing relentlessly to bring back the barge as Mei-Lei sleeps. Suddenly the current shirts, he can't seem to make the oar move at all. He wakes Mei-Lei so she can help him row, but it is no use, the barge starts moving in the opposite direction. In the distance they notice a fisherman and try to call out to him, but he is too far and cannot hear them. Beyond a huge boulder they see a forest and start rowing furiously in its direction. Finally ashore, Moko and Mei-Lei think that the sea still had another secret in store for them, this new part of Mei-Lei's island.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko wants to head off and tells Totemie that he must find the end of the world. But a fisherman tells them that no one will find what it is that they seek unless they have passed by the blue holes, or underwater cave. Moko doesn't understand but follows the path of a mysterious and immense blue hole in the middle of the ocean. This is when strange things begin happening. The sea is swirling and the sky changes color. Strange lights appear in front of their raft, then disappear. They get the impression that they are flying high above the ocean, then mysteriously they find themselves back on the beach. Moko remembers his first trip and thinks that this must be the heart of the ocean beating for his old friend.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story;" approach to explaining these natural phenomena. In this episode, it is night time and Moko can't sleep. Looking out to the horizon, he notices a shot of color at the water's surface. He wakes Mei-Lei to ask her what he is seeing. Together they take a barge and set off. Under them, a rainbow of colors is dancing in the waves. Moko and Mei-Lei think that the fish must be organizing a party and decide to dive in. Bit by bit the sun is rising and day is breaking. The two friends return to the village, overjoyed at the wonders of the ocean.
Showing collections 1 to 4 of 4
Collection of anatomy resources
A collection containing 21 resources, curated by Benetech
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
Biology related concepts
A collection containing 59 resources, curated by Benetech
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
