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Follow the history of hydroelectric energy and explore the process of turning the down flow of water into usable energy. Shows the function of the turbine and water level at the hydroelectric dam, as well as the scale of a dam construction.
(Source: DCMP)
To what degree are we genetically programmed with certain traits and abilities? Looks at recent technologies and scientific discoveries and considers the classic "nature versus nurture" discussion. Segments cover identical twins, the science of biotechnology, and the genetic inheritance of working dogs. Investigates the similarities in personality shared by identical twins. Explains how recent breakthroughs in genetics research and DNA have created new ways to solve crimes, breed (clone) animals, and extend human life. Discusses cross-species cloning, human cloning, and gene therapy. Shows how assistance and search-and-rescue dogs can be taught to overcome their inborn instincts and fear.
The engine's job is to convert the energy in fuel to speed. With the application of scientific principles, NASCAR mechanics have discovered ways to quickly and efficiently get the race cars the speed they need to compete. Part of "The Science of Speed" series.
Bill Nye unravels the mysteries of solar-powered space travel. See how NASA's “Juno” spacecraft uses the power of the sun to make the long journey to Jupiter. Part of the “Why With Nye” series.
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.
Host award-winning geoscientist, Richard Alley provides an eye-opening look at some of the world’s most important energy decisions, and an assessment of what it takes to build a sustainable energy infrastructure. Part 2 of Earth: The Operators’ Manual.
Hanna and Olli race to get to a distant island. They have a choice between a motorboat and a sailboat. Hanna chooses the motorboat and leaves Olli with the sailboat. Who will win the race? They both learn important lessons about energy and natural resources. Part of the "My Little Planet" series.
More energy from the sun hits the Earth in one hour than is consumed on the planet in a whole year. Caltech chemical engineer Sossina Haile and University of Minnesota mechanical engineer Jane Davidson are working to expand the nation’s renewable energy storage capacity. Their mission is to put the heat of the sun to work creating renewable fuels from sources that don’t need to be drilled out of the ground. Part of the National Science Foundation Series “Science Nation.”
Begins with rock concert footage interspersed with interviews with well-known
The honeybee is vital to the pollination process and to the food supply. Agriculture depends on increasing the number of honeybees on farms, and scientists are studying ways to save and increase the honeybee population.
MIT professor Tom Levenson retells the amazing history of planet Vulcan. It is a story that reveals how the power of an idea can shape the currents of thought, and sometimes, lead researchers down the wrong path. Meanwhile, Harvard experimental particle physicist Melissa Franklin reflects on how the lessons from Vulcan apply to research today and how, in the end, science manages to get things right. Part of the "Think Like a Scientist" series.
While Earth's weather reports center on precipitation, temperature, wind direction, and humidity, space weather forecasts attempt to predict activity that occurs on the sun. Scientists also study how the weather on the sun will affect Earth. At the University of Michigan a team studies solar storms as they form and then barrel off the sun. Sometimes these storms hit the Earth with damaging force. Space weather has the potential to interfere with everything from satellite communications to electrical power. This team is aiming for a five-day forecast capability to give government, private industry, satellite operators, and power grid companies more time to take necessary action to protect critical infrastructure. Part of the "Science Nation."
First in a three-part series exploring the history of race perceptions and behaviors towards races in the United States. Explores how recent scientific discoveries have toppled the concept of biological race. Follows a dozen high school students who sequence and compare their own mitochondrial DNA looking for a "race marker," with surprising results. Also looks at the history of racism in the United States, the advent of stereotypes based on physical attributes attributed to races, and somatotypes, with particular reference to African Americans.
Modern society is very much defined by its access to electricity. What if researchers could advance sustainable energy technologies to the point where everyone around the world had access to clean, cheap energy sources? Richard Smalley, 1996 Nobel Prize winning chemist, called it the greatest challenge facing the world in the 21st century and coined the phrase "terawatt challenge." Researchers at the Quantum Energy and Sustainable Solar Technologies (QESST) Center are hoping to meet much of the terawatt challenge with solar technology alone by vastly improving the performance of photovoltaic cells. Part of the National Science Foundation Series “Science Nation.”
In a gas turbine, the linear motion of gas causes rotors to spin, ultimately creating electricity. The forward rotating blades pump air under high pressure into the combustion chamber where natural gas ignites on contact with the air. At 1,500 degrees Celsius, the stream of gas rushes past the rear turbine blades, causing the entire rotor to spin. A generator transforms that rotational energy into electricity.
The National Science Foundation's National High Magnetic Field Laboratory, or National MagLab, is a global destination for ground-breaking research across scientific disciplines. Nearly 2,000 scientists from around the world use the MagLab's facilities each year to study the power of high magnetic fields. They explore new physical phenomena and develop materials for future technologies. Part of the "Science Nation" series.
Figure 2.7 (OpenStax, Biology 2e) caption: Bohr diagrams indicate how many electrons fill each principal shell. Group 18 elements (helium, neon, and argon) have a full outer, or valence, shell. A full valence shell is the most stable electron configuration. Elements in other groups have partially filled valence shells and gain or lose electrons to achieve a stable electron configuration.
(Source: OpenStax)
Using only gasoline to power cars back in 1905 was cheaper and easier, so the hybrid car was forgotten-until recently. The modern hybrid car has two distinct power sources working together to make it run: gas and electric power. Since the fuel widely used now is a non-renewable resource and becoming increasingly less affordable, the hybrid car is making a comeback. The benefit of the hybrid is that instead of running on gas, it uses non-polluting electric power when possible. Also, it helps cut pollution and saves drivers money at the gas pump.
Figure 2.9 (OpenStax, Biology 2e) caption: Two or more atoms may bond with each other to form a molecule. When two hydrogens and an oxygen share electrons via covalent bonds it forms a water molecule.
Solutions are classified as acidic or basic based on their hydrogen ion concentration relative to pure water. An acidic solution has a higher concentration of hydrogen ions, and a basic solution has a lower concentration of hydrogen ions. Other topics covered include chemical reaction basics, properties of acids and based, acid-base reactions, and other mixtures. Part of the "Chemistry" series.
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A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
Biology related concepts
A collection containing 59 resources, curated by Benetech
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
