613 resources and 4 collections matched your query.
Library of 3383 accessible STEM media resources.
Showing resources 601 to 613 of 613
Select a resource below to get more information and link to download this resource.
Earth's landscapes vary because there are different climatic zones that have unique, distinguishing conditions. One of these, the tropic zone, is divided into four more specific zones. The rainy tropics, wet-dry tropics, tropical and subtropical deserts, and tropical highlands are similar, yet different. Includes information on vegetation, animal life, human settlement, urban centers, and climatic conditions.
(Source: DCMP)
Host award-winning geoscientist, Richard Alley provides an eye-opening look at some of the world's most important case studies in smart energy. Alley travels to Spain and Morocco where large-scale solar farms and individual photovoltaic panels atop tents in the Sahara are beginning to bring the vast potential of the sun down to Earth. In Brazil, abundant natural resources are transformed into efficient, sustainable biofuel, making Brazil the only nation whose cars could keep running if all gasoline were to vanish. In Denmark, and West Texas, citizens have taken sustainability into their own hands by becoming stakeholders in wind turbines. And in China, he explores multiple sustainable energy technologies, including exclusive footage from GreenGen, the world's most advanced low-carbon emissions power generation plant. Part One Earth: The Operators’ Manual.
Pumpkins! Every fall we carve them for jack-o'-lanterns, munch their seeds, and cook delicious things with them. But where do they come from? How do they grow? Close-up and time-lapse photography chart the growth of the pumpkin plant from sprouting seed to maturity. Danny Glover narrates in verse accompanied by George Winston's music.
This program from the acclaimed PBS Nature series, "Forces of the Wild," shows how man risks everything by building on earthquake fault lines, farming the slopes of volcanoes, polluting the air and warming the Earth. Like children playing with matches, we have no idea of the consequences of what we are doing. Narrated by James Earl Jones.
Tongue taste areas The tongue is a muscular organ in the mouth of most vertebrates that manipulates food for mastication, and is used in the act of swallowing. It is of importance in the digestive system and is the primary organ of taste in the gustatory system. The tongue's upper surface (dorsum) is covered in taste buds housed in numerous lingual papillae. It is sensitive and kept moist by saliva, and is richly supplied with nerves and blood vessels. The tongue also serves as a natural means of cleaning the teeth. A major function of the tongue is the enabling of speech in humans and vocalization in other animals. The human tongue is divided into two parts, an oral part at the front and a pharyngeal part at the back. The left and right sides are also separated along most of its length by a vertical section of fibrous tissue (the lingual septum) that results in a groove, the median sulcus on the tongue's surface. There are two groups of muscles of the tongue. The four intrinsic muscles alter the shape of the tongue and are not attached to bone. The four paired extrinsic muscles change the position of the tongue and are anchored to bone. Do you have good taste? In this video segment, Dr. Linda Bartoshuk explores the sense of taste in humans - why we have it, and what happens when we lose it. Learn why the sense of smell is also important to our experience of food. Footage from NOVA: "Mystery of the Senses: Taste".
(Source: OpenStax)
Argentinean agriculture has one of the world’s highest productivity rates and is known for its soybean, corn and sunflower crops. However, the industry is also a significant contributor of greenhouse gas emissions. These climatic changes could in turn affect the productivity of the agricultural sector as well as impact economic aspects of the farmers’ lives. Chapter 3 of Air: Climate Change Series.
The Three Gorges Dam is the largest hydro-electric dam in the world. Yet questions abound over environmental and social issues, not to mention the logistic problems of moving ships up and down the river. An ingenious system of ship locks has gone towards solving that problem, echoing the techniques of Banaue farmers in the Philippines who mastered the art of managing water over two thousand years ago.
The evolution of the uses of corn coincides with some significant historical events. Throughout history, it has been a staple in the human diet, but in the 1950’s, it became the main ingredient in the meat industry. Farmers used corn to shrink the growth periods of cattle to meet the demand of the consumer. Corn syrup was born from the Cuban Embargo. Today, genetically engineered corn is seen in nonfood products.
Researchers at New York University are tackling one of the major challenges in agriculture. They are trying to raise healthy plants while minimizing the use of fertilizer and the leaching of fertilizer chemicals into the environment. A team led by scientist Gloria Coruzzi and computer scientist Dennis Shasha is using the latest tools to develop new plant varieties that don't need as much nitrogen to grow. The researchers are also investigating which of the plant's genes control fertilizer uptake. Part of the "Science Nation" series.
Consider the following: humans live twice as long as their ancient ancestors did even though their bodies contain different types of synthetic and sometimes toxic substances. This is an unpleasant part of life in the modern age. Explores the health impact, wide variety, and alarming ubiquity of manufactured chemicals. Shows how communities around the world, including Inuit seal hunters, Asian and African farmers, and residents of an industrial town in the United States address the pervasiveness of molecular compounds found in pesticides, plastics, and other products. The benefits of these chemicals are weighed against their dangers.
Timeblazers Jen and Sam travel back 63 million years before the first primitive people appeared on Earth, and they learn that people and dinosaurs never met. They jump to the Paleolithic age, when humans first appeared, to see some "cavemen," as they are often called. About 8000 BCE the first primitive civilizations began to develop after humans started farming. Then to 3100 BCE: The Egyptians. Around 750 BCE came the ancient Greek civilization; then from about 27 BCE to 476 CE came the Roman Empire. Then came the Middle Ages from 500 to about the year 1400, the Renaissance.
Left for dead after decades of neglect, the Colorado River in Northern Mexico was once a vibrant wetland ecosystem the size of Rhode Island. People have come together in an attempt to restore the delta of the river. They have instituted programs and policies to reconnect a healthy river to the sea.
Leaf cutter ants could be called the overachievers of the insect world. They are farmers, medicine makers, and green energy producers. With support from the National Science Foundation, bacteriologist Cameron Currie studies the complex evolutionary relationships between the ants, the fungi they cultivate and eat, and the bacteria that influence this symbiosis. At the University of Wisconsin-Madison, Currie works with the Great Lakes Bioenergy Research Center on campus to explore how the ants manage to degrade cellulose. Her goal is to discover new ways humans might break down biomass into biofuels. The bacteria component of the ant colony could also help scientists develop more effective antibiotics for human health and agriculture.
Showing collections 1 to 4 of 4
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
Resources related to vision
A collection containing 12 resources, curated by Charles LaPierre
Collection of anatomy resources
A collection containing 21 resources, curated by Benetech
