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Deserts are some of the harshest environments in the world. They can be found just about anywhere water is scarce, including in tropical rain forests and even in cold and snowy Antarctica. When most people think of deserts, they immediately think of scorching heat. However, it takes more than heat alone to create a desert. While each desert is unique, all share commonalities: they are dry, windy, arid lands with little annual rainfall.
(Source: DCMP)
Uses the extremes of temperature that occur in a day's skiing to show the range of mechanisms through which the human body maintains a steady internal temperature and protects its vital organs, such as shivering, hair erection, and rerouting of blood supplies to conserve heat. Increased blood flow to the body surface, sweating, and panting to lose heat is also reviewed. NOTE: Contains some nudity.
Join vulcanologists as they venture into the heart of Ethiopia's Erta Ale, the oldest live volcano in the world, to ply its secrets of creation. Their mission to sample molten rock from the lava lake requires hauling more than 1000 pounds of gear to the crater, and then rappelling into the active cone. Blistering heat and sulfur stench greet them as they battle this formidable boiling mountain for the sake of science. Segment of video from Wild Chronicles Series.
Energy has been essential for the development of human activities from the Industrial Revolution to present day. Over the course of history, human consumption of energy has increased significantly. Currently, society depends largely on nonrenewable energies that come from fossil fuels. However, the increase in greenhouse gas emissions has highlighted the need to change from fossil fuels to renewable energy sources that reduce environmental contamination. Many industries are committing to the development of alternative energy sources that don’t contribute to global warming. Chapter 9 of Air: Climate Change 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.
Learn about powerful cyclones happening on Saturn. From a distance, Saturn appears to be serene; however, the Cassini spacecraft has provided detailed views that show the planet's active atmosphere.
Students demonstrate the process for making cheese and how the composition of milk aids the cheese making process.
Learn the differences between sedimentary, metamorphic, and igneous rocks.
Scientists at MIT's D-Lab are turning trash into treasure. They are using trash to heat homes and cook in developing countries. Part of the "Science Out Loud" series.
This episode discusses the scientific method and the importance of using credible sources when conducting research. Other topics covered include control group, constants, independent variable, and dependent variable. Part of "The Amoeba Sisters" series.
Explore some properties of water with Petunia and Pinky. It's all about those hydrogen bonds. Terms discussed include adhesion, cohesion, surface tension, and specific heat. Part of "The Amoeba Sisters" series.
What makes a glow stick glow? And why doesn't it heat up from the light? The answer lies in the processes taking place during chemiluminescence.
Stuart Rowan, a professor at Case Western Reserve University, has created polymers that are able to self-heal when heat is applied using a special light. Part of the Fast Draw Series.
Tests the heat zones of a Bunsen burner and shows some elements' coloration when placed in the flame. Notes that chemistry is everywhere, in both natural and man-made components.
What's the difference between thermoplastics and thermoset plastics? The primary physical difference is that thermoplastics can be remelted back into a liquid, whereas thermoset plastics always remain in a permanent solid state. Part of the "Ask a Scientist" series.
What percent of earth's water is fresh? What are sources of freshwater? What is groundwater and how is it formed? Covers these questions and more in this discussion of water's characteristics, the water cycle, and freshwater's importance. Concludes with a quiz.
Unpredictable, stormy weather is a natural outcome of a warmer planet. As things heat, they become more volatile. From entire floating neighborhoods to massive harbor floodgates, cities around the world are trying to engineer their way to a safer future. Everything from farming to the insurance industry to building codes will have to change.
This video describes the five main forms of energy and how to differentiate between them. Students will learn how to calculate potential and kinetic energy. Everyday examples illustrate the impact of energy on daily life. Other topics covered include chemical energy, nuclear energy, electromagnetic energy, heat energy, mechanical energy, and the law of conservation of energy.
David Boboltz of the National Science Foundation provides information on where to obtain the appropriate glasses to view the solar eclipse. He advises those wishing to view the eclipse to check with their local libraries and various online sources.
Graphene could make it possible for electricity to move effortlessly through computer chips, thereby allowing computer systems to run faster than ever before. Savings in both heat and energy costs could have graphene replacing silicon as the basis of computer chip construction. Part of the Fast Draw Series.
Showing collections 1 to 3 of 3
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
Biology related concepts
A collection containing 59 resources, curated by Benetech
