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Space weather can have important consequences for everyday life, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation. The United States Geological Survey (USGS) Geomagnetism Program monitors variations in the Earth's magnetic field through a network of 14 ground-based observatories around the United States and its territories, providing data in real-time to a variety of customers.
(Source: DCMP)
Global warming is accelerating the melting of the world’s glaciers. The rate of glacial retreat has increased over the last hundred years due to global warming and the increase of greenhouse gas emissions. The increase in glaciers melting has significant impact on the water supply for many global communities. Glacial retreat also impacts world climate zones since glaciers help regulate the climate of the planet. However, scientists argue that it is not too late to reverse the effects of global warming in an effort to decrease the rate at which glaciers are melting. Chapter 11 of Air: Climate Change Series.
Students explore the outer planets of the solar system. Vivid, colorful images transmitted by exploratory spacecraft serve as the basis of this video tour of Jupiter, Saturn, Uranus, and Neptune. Often referred to as the "gas giants," the unique features of these large and distant planets are described. Jupiter's Giant Red Spot, Saturn's colorful rings, and the fierce storms of Neptune are highlights of the program. Important terminology includes: sun, rotation, revolution, orbit, ellipse, gravity, inertia, telescope, Hubble telescope, exploratory spacecraft, asteroid belt, meteoroid, and comet.
Explains the science behind the workings of a nuclear power station. The basic version explores what fission is; the role of cooling water in nuclear reactors; the nuclear fuel cycle on mining, milling, enrichment, fabrication, and spent fuel on storage and reprocessing; and other uses of nuclear energy, including "non-power" uses. The advanced version expands on this information with a specific example of a fission reaction; the use of water to vary reactor power; different methods of mining uranium; a detailed discussion of enrichment, including structure and properties of uranium hexafluoride; and two methods of enrichment: centrifuging and gas diffusion.
The Magic School Bus is an award winning animated children’s television series based on the book series of the same title by Joanna Cole and Bruce Degen. It is notable for its use of celebrity talent and being both highly entertaining and educational. The debate is intense: Should Walkerville get rid of the swamp by the river and replace it with a fantastic new shopping mall? Carlos, representing his class, is given the task of persuading the town council to keep the smelly old swamp. The kids learn that the swamp is an important habitat and natural water filter, but the council's not convinced until a flood occurs.
Everywhere one looks in Southern Louisiana there's water: rivers, bayous, swamps, the Mississippi River, and the Gulf of Mexico. And everyone in Cajun Country has a water story, or two or three or more. Its waterways support the biggest economies in Louisiana - a $70 billion a year oil and gas industry, a $2.4 billion a year fishing business, tourism and recreational sports. But these waterways are also home to some insidious polluters along a 100-mile-long stretch of the Mississippi known "Cancer Alley," the world's largest Dead Zone in the Gulf of Mexico and erosion that is costing the coastline twenty five square miles of wetlands a year.
Climb aboard the Cyclops, a microscopic research vessel, and investigate an amazing hidden world on which all living things depend. The Cyclops houses a team of scientists known as the Micronauts and guides them through their discoveries of biological classification, diversity, and ecology. In this episode, the Cyclops crashes into the bottom of the pond and discovers an ooze populated by bacteria. After gathering some, the Micronauts begin to investigate the chemical method the bacteria uses to decompose organic material. In the end, the bacterial also helps the crew escape the bottom of the pond so they can continue to explore. Part 5 of the Microscopic Monsters Series.
Gravity rules the life cycle of stars. During the Red Giant dying stage in the life of an average size star, its outer layers are blown off in vast clouds of dust and gas called "nebulae" that contain hydrogen, oxygen, and nitrogen. Gravity crushes the remaining atoms into a remnant core called a white dwarf. The gravity of giant stars-10 to 20 times larger than average-will, at the end of their life in a supernova explosion, crush together even mutually repulsive protons and electrons, leaving a remnant rotating core of neutrons (i.e., a pulsar). Also explains how stars 20 to 100 times average size collapse into a core so dense that its gravity doesn't even allow light to escape (i.e., a black hole).
In this episode, Dr. Varoujan Gorjian discusses what happens when galaxies collide. Usually new stars form due to the impact of gases on one another. Part of the "Ask an Astronomer" series.
With recent advances in genetic and reproductive technology, couples can now rely on science to avoid giving birth to children with various genetic conditions. Explores the medical and ethical dilemmas that two couples face as they plan the birth of a child who may inherit their own genetic condition (dwarfism in one case, cystic fibrosis in the other). Bioethicists question the use of technology to ensure parents give birth only to a healthy child. NOTE: Includes footage of a baby being born via Caesarian section.
Part of a series that features a wide variety of video footage, photographs, diagrams, graphics, and labels. For this particular video, students will focus on the conditions that create the greenhouse effect, and its impact on the environment. Part of the Science Video Vocab series.
Part of the animated "Johan, the Young Scientist" series. Professor Hoo sets the group of young scientists off to another treasure hunt, this time using the primary colors as their clues. From there, the kids learn about the masking qualities of primary colors and also about camouflage.
What is the difference between hydrosphere, lithosphere, and atmosphere? What gases make up the atmosphere? How many layers are in our atmosphere and what are their differences? After answering these and other questions, concludes with a quiz.
Scientists have long chalked up ocean mixing of salt, heat, nutrients, and gases, such as oxygen and carbon dioxide, to wind and tides. New research is investigating another possible contributor: krill. Mixing ocean water may seem like a big job for such a tiny creature, but krill are a force of nature when they migrate in giant swarms to feed at night. Part of the "Science Nation" series.
New research reveals that loss of sleep leads to increased anger. Researchers are now studying the link between loss of sleep and aggressive behavior. Other segments include bacteria that consume greenhouse gases, a handy robot glove, and drones mapping marine megafauna. Part of the "4 Awesome Discoveries You Probably Didn't Hear About This Week" series.
Part of the "Branches on the Tree of Life" series. Phylum Mollusca is the second most diverse phylum of animals, with over 100,000 known species. First examined are the basic characteristics of the phylum-a soft body, muscular foot, mantle cavity with gill, and hard calcified shell. Studies the four most familiar classes of molluscs (chitons, gastropods, bivalves, and cephalopods) in depth, viewing structure, life history, adaptations, and ecological interactions.
Presents the principles of atmospheric dynamics. The Earth's atmosphere is a balance of gases and sunlight that allows for the possibility of life. It has a composition, structure, and life sustaining biological, geological, and chemical cycles in its lower reaches. Also, discusses how these atmospheric elements are being impacted by the unprecedented burning of fossil fuels.
Volcanoes are a part of the earth, and they have intrigued people for hundreds of years. Scientists study the earth's plates in order to understand the complexity of volcanic activity around the world. They also study different types of lava, rocks, and the gases that have dissolved into rocks. In the past, studying volcanic activity was extremely dangerous for scientists. Now they have access to tools, such as global positioning systems and seismometers, to help in predicting volcanic activity.
Humanity's appetite for the earth's resources and consumer goods has led to increased levels of carbon dioxide entering the atmosphere, trapping more heat from the sun, and leading to the warming of the atmosphere. Argues that action could and should be taken at both international and political levels. Also addresses the question of what each individual can do to reduce his/her use of nonrenewable energy sources and lower each personal "carbon footprint" on the planet.
As shown on the History Channel. Over 20 years ago, Mount St. Helen's--thought to be dormant--shocked America when it exploded. It is an acidic volcano--the magma beneath is full of volatiles making it highly explosive. A new plug has formed in its throat and is rising. When it blows, it will be like uncorking a champagne bottle, releasing pressure below and allowing dissolved gases to escape and explode. The question is, When will it blow again?
Showing collections 1 to 4 of 4
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
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
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
