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The decade saw The Great War, The Flu Epidemic and the Titanic disaster. Ten years into the 20th Century and the world is grappling with some serious growing pains. In a decade racked by conflict, there were inventions that made the world both safer and infinitely more dangerous. Featured inventions include: the parachute, the gas mask, the toaster, the Tommy Gun, and sonar.
(Source: DCMP)
Provides important steps you can take and become self-reliant to prepare for various emergency situations topics include: Weather-related disasters, hurricanes, tornadoes, blizzards, floods, wildland fires, earthquakes, power outages, terrorism, bio terrorism, pandemics, avian and swine influenza, radiation emergencies, effects of climate change, and other disruptions including civil unrest. Knowing what you and your family can do to prepare for any type of disaster will help reduce stress if a natural or man-made disaster occurs. Having the proper supplies and knowing how to use them can make a difference between life and death in time of an emergency. Explains how to store food and water and you can have hot, tasty meals without electric power.
Deep in Southern Mexico's jungle, the Villa Luz limestone caves support an ecosystem that thrives in a highly poisonous, acidic environment. This rare type of cave is found in few spots on Earth. Geologists and biologists wear gas masks and protective outerwear to explore the caves. All life forms, from microbial colonies to spiders, fish and bats, are interdependent upon the toxic soup of water, sulphur-oxide and hydrogen monoxide for survival.
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.
Gas hydrates are a significant potential energy source occurring in ocean-floor sediments at water depths greater than 500 meters. The USGS (US Geological Survey) operates a gas hydrates laboratory on its Menlo Park campus. USGS geophysicists Laura Stern and Steve Kirby detail how they study and create gas hydrates in their super-cooled lab.
Anything that takes up space or has mass is matter. Under certain conditions matter can be a solid, liquid, gas or plasma. Different states of matter can be combined in suspensions, and solutions and mixtures can be taken apart. Exploring the physical and chemical properties of matter provides insight into nature and a glimpse at how scientists and engineers use this knowledge to shape our world.
Wearing a mask is a cheap and easy way to help stop the spread of airborne infections like COVID-19. Here's some slow-motion Schlieren imaging experiments to demonstrate why masks work. Part of the "It's Okay to Be Smart" series. Please note this title contains mature themes and references.
What are the differences between solids, liquids, and gases? In this program, students will investigate real-life examples of the various phases of matter. Colorful animations illustrate how these states differ based on the movement of particles. Other topics covered include plasma, crystalline and amorphous solids, viscosity, freezing, vaporization, evaporation, and condensation.
Chemistry is the science of interacting particles and the various states of matter. Developing a better understanding of the atomic model through experiments with gases, scientists discovered the Ideal Gas Law, developed phase diagrams, and learned about the properties of supercritical fluids. Today's chemists are exploring new ways to control the interactions of atoms, with the goal of making better hydrogen-powered cars and new technologies for the long-term, underground storage of carbon dioxide to reduce greenhouse warming. Part of the series Chemistry: Challenges And Solutions.
Water commonly exists in three different forms: ice, liquid, and vapor. The different phases of water serve as the foundation to teach students about solids, liquids, and gases. Other common everyday examples of solids, liquids, and gases are also featured. Concepts and terminology discussed include: particles, volume, shape, and temperature.
Introduces the concept that everything is made of matter, and examines the three states of matter. Defines and examines a range of solids, liquids, and gases. Uses graphics to show the effects of heat on atoms and molecules in solids. Summarizes each segment.
A teenage narrator presents general information about matter: its characteristics, qualities, properties, and states and changing states. Gives definitions and a review.
Like everyone else, George Huber knows money doesn't grow on trees. But, ask him where gasoline comes from and he won't just tell you, he'll show you. To fully understand, Science Nation recently went with Huber to a local lumber yard in Amherst, Mass. A lumber yard is the perfect place to find cellulose, the key building block in plant cells and the organic material that gives plants their structure. So what does cellulose have to do with gasoline? A lot.
This chapter provides a summary of the material discussed in the previous twelve chapters. Some of the topics reviewed include: the greenhouse effect, global warming, and climatic changes. This chapter also highlights the consequences associated with global warming from major cities to the rural country side. Viewers also explore ways to lessen the impact of global warming and how to adapt to the new climate conditions. Chapter 13 of Air: Climate Change Series.
Argon is a chemical element with the symbol Ar and atomic number 18. It is a noble gas and the third-most abundant gas in the Earth's atmosphere.
(Source: Library Lyna)
Neon is a chemical element with the symbol Ne and atomic number 10. It is a noble gas. Neon is a colorless, odorless, inert monatomic gas under standard conditions.
In the Rosebud River valley, an hour east of Calgary, the water in many homes can be lit on fire. Everyone agrees there's gas in the water. Few agree on why. At Fiona Lauridsen's farm, just outside the hamlet of Rosebud, showering has become a dangerous activity. Fiona and her family developed skin burns from simply taking a shower and Fiona claims that EnCana, Canada's largest natural gas company is responsible. She claims that EnCana has contaminated the aquifer by drilling (fracking) for coal bed methane, a new source of natural gas extraction that often uses chemicals for drilling. Yet in the hamlet, where the Rosebud Theatre is a popular tourist attraction and graciously sponsored by EnCana, most residents refuse to even talk about burning water, for fear of harming the tourist industry.
Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements.
Sherlock Olmos decides to dig deeper into dark corner of this great house to investigate the suspicious behavior of some chemical elements. The exchange of electrons and the characteristics of hydrogen, fluorine gas, and the noble gases are the primary subjects of his investigation. Part of Chemistry: Solved by Sherlock Olmos Series.
With today's high fuel costs, it is time to start looking beyond petroleum and into renewable resources to power vehicles. Ethanol is a clean-burning fuel derived from plants, primarily corn. It is combined with gasoline to produce a cleaner fuel that doesn't emit as many greenhouse gases as pure gasoline. Pure ethanol has not yet been approved to fuel vehicles, but it is the fuel of choice for racecars. By mixing gasoline with ethanol, fuel supply can be extended. Explores the production of ethanol and highlights the importance it holds in the "green power" movement.
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
