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died Aug. 28, 1818, St. Charles, Mo., U.S.
black pioneer trader and founder of the settlement that later became the city of Chicago.
Du Sable, whose French father had moved to Haiti and married a black woman there, is believed to have been a freeborn. At some time in the 1770s he went to the Great Lakes area of North A... | <urn:uuid:c7c44bd1-3600-48a9-b33a-acfce3aaa2c0> | {
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Tornadoes are the most intense storms on the planet, and they’re never discussed without at least some mention of the term wind shear. Many of us sitting at home, though, have no idea what wind shear is, or if we do, how it affects tornado production.
What is Wind Shear
Wind shear, although it might sound complex, is a... | <urn:uuid:7400301c-e625-46d5-be90-1020cf8d52f8> | {
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On this day in 1951, more than six years after the end of World War II in Europe, President Harry S. Truman signed a proclamation officially ending U.S. hostilities with Germany.
The official end to the war came nine years, 10 months and 13 days after Congress had declared war on Nazi Germany. The lawmakers had respond... | <urn:uuid:802d6d3f-73ff-4476-973b-a3c618ed8f7a> | {
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The significance of Alabama Unionists during the Civil War and Reconstruction has long been a subject of study among scholars. Largely centered in northern Alabama and to a lesser degree in the southeast region and in Montgomery and Mobile, Unionists were important both militarily and politically. Until recently, howev... | <urn:uuid:dcf6578e-71df-4e20-904c-5952df38fb9c> | {
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Uveitis is inflammation of the uvea, which is made up of the iris, ciliary body and choroid. Together, these form the middle layer of the eye between the retina and the sclera (white of the eye).
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Marion Levine teaches English, Literature and Film Production at Los Angeles Center for Enriched Studies, Los Angeles, CA
Measure for Measure, Act 4 or 5
What's On for Today and Why
Students will choose a character from Measure for Measure and create a "back story" for that character. This will encourage students to re... | <urn:uuid:86849ab7-4070-40ee-9f28-f23c0e6d4e97> | {
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Jim Lake and Maria Rivera, at the University of California-Los Angeles (UCLA), report their finding in the Sept. 9 issue of the journal Nature.
Scientists refer to both bacteria and Archaea as "prokaryotes"--a cell type that has no distinct nucleus to contain the genetic material, DNA, and few other specialized compone... | <urn:uuid:baf824b2-7e06-471a-8510-efd5abab1567> | {
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Mercury in the Morning
The planet Mercury -- the planet closest to the Sun -- is just peeking into view in the east at dawn the next few days. It looks like a fairly bright star. It's so low in the sky, though, that you need a clear horizon to spot it, and binoculars wouldn't hurt.
Mercury is a bit of a puzzle. It has ... | <urn:uuid:d0a1999f-a775-4afc-bcfd-ee6ff6243a0b> | {
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Black holes growing faster than expected
Black hole find Existing theories on the relationship between the size of a galaxy and its central black hole are wrong according to a new Australian study.
The discovery by Dr Nicholas Scott and Professor Alister Graham, from Melbourne's Swinburne University of Technology, foun... | <urn:uuid:e617c5fd-d556-4d43-be1f-042e7e7f2c60> | {
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Hoodoos may be seismic gurus
Hoodoo prediction Towering chimney-like sedimentary rock spires known as hoodoos may provide an indication of an area's past earthquake activity.
The research by scientists including Dr Rasool Anooshehpoor, from the United States Nuclear Regulatory Commission, may provide scientists with a ... | <urn:uuid:85a979cb-9571-4e06-b38a-2f79912abb44> | {
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Science Fair Project Encyclopedia
The chloride ion is formed when the element chlorine picks up one electron to form the anion (negatively charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. An example is table salt, which is sodium chloride with the chemical formul... | <urn:uuid:4e76b8fd-c479-45d7-8ee7-faf61495aecb> | {
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Fun Classroom Activities
The 20 enjoyable, interactive classroom activities that are included will help your students understand the text in amusing ways. Fun Classroom Activities include group projects, games, critical thinking activities, brainstorming sessions, writing poems, drawing or sketching, and more that will... | <urn:uuid:7da8e5fb-c5fb-415f-93c4-97d18531f703> | {
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What is bone cancer?
Bone is the framework that supports the body. Most bones are hollow. Bone marrow is the soft tissue inside hollow bones. The main substance of bone is made up of a network of fibrous tissue onto which calcium salts are laid down. This makes the bone very hard and strong. At each end of the bone is ... | <urn:uuid:cc6f91ff-3151-4cd9-8163-a7274ef9de2f> | {
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In the American electoral system, a primary election is an election that determines the nominee for each political party, who then competes for the office in the general election. A presidential primary is a state election that picks the delegates committed to nominate particular candidates for president of the United ... | <urn:uuid:c66cbd20-f2be-4f73-902d-7b0198351323> | {
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Learning is the means whereby we acquire new working knowledge about the world. Memory is the means whereby we retain that knowledge over time. Our abilities to learn and remember are essential to our sense of self and our ability to function effectively in daily life. Memory is the glue that holds our mental life toge... | <urn:uuid:6eafc168-0fd9-4248-ab08-030a35cb48b2> | {
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The Matter at Issue: The Throne of France
The Hundred Years War was fought largely over who would be the king of France. The English kings, who had originally been French nobles that invaded and conquered England in 1066, still held lands in France. The English lands in France had long been viewed uncomfortably by the ... | <urn:uuid:1f4f86d3-c09c-44ad-95d3-340f176f8e84> | {
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Like the Republican party, the Democratic party also cracked beneath the weight of the issues at hand. States that favored slavery in the territories walked out of the Democratic convention at Charleston, preventing nominee Stephen Douglas from winning the party endorsement. A reconvened convention eventually nominated... | <urn:uuid:13028e4a-e4c5-477c-ac63-506fc2400ab6> | {
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The following information was extracted from the publication "Threatened"
produced by BNZ in cooperation with the Department of Conservation
and Royal Forest and Bird Protection Society.
The Predation Threat
In 1987, a dog was on the loose in Waitangi State forest in the Bay of Islands. For six weeks it rampaged throug... | <urn:uuid:9a72a1b6-062c-472b-953a-6ed25e5be7b9> | {
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Too many of our young people are caught up in conflicts every day that they do not know how to manage -- teasing, jealousy, and physical aggression. Juvenile delinquency and violence are symptoms of youth's inability to manage conflict in their lives. Teaching youth how to manage conflict in a productive way can help r... | <urn:uuid:2117d9f1-3399-4b6a-929c-55e15ad30135> | {
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A tracheostomy (TRA-ke-OS-to-me) is a surgically made hole that goes through the front of your neck and into your trachea (TRA-ke-ah), or windpipe. The hole is made to help you breathe.
A tracheostomy usually is temporary, although you can have one long term or even permanently. How long you have a tracheostomy depends... | <urn:uuid:39ecdb48-857a-435c-acae-3974e2b40bfd> | {
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by I. Peterson
Unlike an ordinary, incandescent bulb, a laser produces light of a single wavelength. Moreover, the emitted light waves are coherent, meaning that all of the energy peaks and troughs are precisely in step.
Now, a team at the Massachusetts Institute of Technology has demonstrated experimentally that a clo... | <urn:uuid:5a667bf7-c324-483a-8231-ce8448d754f3> | {
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The American Revolutionary War began in 1775 and ended in 1783. The British ruled the American colonists and they had become increasingly rebellious. General Gage had ordered 700 British soldiers to Concord to destroy a weapon's depot belonging to the colonists. On the way, they are met by some rebellious colonists and... | <urn:uuid:1b7c2cbc-6535-49f1-a99b-cb3d06419f5a> | {
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This series enables children to use the computer for independent research into a range of curriculum related topics. They read the information from talking books and then link to writing grids so they can write about what they have read. High quality real speech gives added support on both the reading and writing activ... | <urn:uuid:14125662-fed3-4dd4-9f5f-a361aa89b968> | {
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The Online Teacher Resource
Receive free lesson plans, printables, and worksheets by email:
- Over 400 Pages
- Great Writing Habits.
- Character Sketches, Plot Summaries
- Excellent for students
Age Range: Kindergarten through Grade 2 (Early Elementary or Primary Level)
Overview and Purpose : In this activity, students... | <urn:uuid:51b12d2f-a0b8-428d-b6b2-849e0164d3d0> | {
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What is Rainwater Harvesting?
Rainwater harvesting is an ancient practice of catching and holding rain for later use. In a rainwater harvesting system, rain is gathered from a building rooftop or other source and is held in large containers for future use, such as watering gardens or washing cars. This practice reduces... | <urn:uuid:14a860e9-8430-426b-8c1a-80c7f022fb96> | {
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July 31, 1998
Explanation: Do you recognize the constellation Orion? This striking but unfamiliar looking picture of the familiar Orion region of the sky was produced using survey data from the InfraRed Astronomical Satellite (IRAS). It combines information recorded at three different invisible infrared wavelengths in ... | <urn:uuid:f2519e47-47f4-4694-91cc-e23c91d5d788> | {
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Combined Gas Law
The Combined Gas Law combines Charles Law, Boyle s Law and Gay Lussac s Law. The Combined Gas Law states that a gas pressure x volume x temperature = constant.
Alright. In class you should have learned about the three different gas laws. the first one being Boyle's law and it talks about the relationsh... | <urn:uuid:5f1963a4-8da7-4d73-9dda-3c8691608115> | {
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Disease outbreaks, such as cholera, are commonly thought to happen after earthquakes and other natural disasters, but studies have found no evidence to support this. And the persistence of this belief may be hurting relief efforts.
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Woodrow Wilson, as described in the introductory section of the text, was the leader of the immediate post-war period and was the architect of an internationalist vision for a new world order. Yet, as discussed in the paragraphs below, he was not able to persuade the other Allied leaders at the peace settlement negotia... | <urn:uuid:54521255-4567-40ea-9b12-eccf47e11bd7> | {
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Biological species emerge and disappear in the natural course of evolution. There have been times in the Earth’s past when mass extinctions have occurred, causing a large number of species to disappear in a short time. This is generally believed to have happened due to external pressures on ecosystems, or sudden shocks... | <urn:uuid:258b17b0-2498-42ca-8464-cff1008bae7c> | {
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Introduction / History
Jews represent the oldest monotheistic religion of modern times. Because of the uniqueness of their history and culture, all Jews have a strong sense of identity. Persecution of and discrimination against the Jews have been the historical reasons for their migrations and settlements around the wo... | <urn:uuid:58c97692-7ec3-45e2-add2-5f67fd45724c> | {
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The Oregon Trail opened the way west for intrepid settlers and enterprising miners. Once it was well established and the roads were cleared and expanded, once towns had grown up along the route and locations in the Rockies and further west were settled, it was only natural that a new method of transportation would take... | <urn:uuid:44892bde-dc4e-4668-88dc-48f754c76b11> | {
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After the British Pyrrhic (costly) victory at Bunker Hill in 1775, British General William Howe decided a lethal blow needed to be delivered to the Patriot cause. Howe proposed to launch an attack on New York City using tens thousands of troops. He began mobilizing the massive fleet in Halifax, Nova Scotia. Meanwhile, ... | <urn:uuid:d9f94478-8f2d-45d3-b081-710593609b23> | {
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The Solar and Heliospheric Observatory (SOHO) spacecraft is expected to discover its 1,000TH comet this summer.
The SOHO spacecraft is a joint effort between NASA and the European Space Agency. It has accounted for approximately one-half of all comet discoveries with computed orbits in the history of astronomy.
"Before... | <urn:uuid:78cbe1bd-1849-4138-b59a-5521e93122a3> | {
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Teaching Strategies: Effective Discussion Leading
While lecturing is a fast and direct way to communicate a body of knowledge, discussion encourages students to discover solutions for themselves and to develop their critical thinking abilities. They learn how to generate ideas, consider relevant issues, evaluate soluti... | <urn:uuid:03dc16ec-33ae-4c39-a06b-93924571a72e> | {
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For many, 1066 is the date when the Middle Ages began. Centuries of castles, cathedrals and churches followed, busy with chivalry, the Crusades and crop-rotation, all ending some time around 1500.
This, of course, is an over-simplification, just as the term Middle Ages itself is. For a long time, the civilisations of t... | <urn:uuid:3430628b-d0a6-4d37-891c-b80e7d9c973f> | {
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Presenting - 'Amasia', The Next Supercontinent!
Ever since Earth has been in existence there have been the formation and breaking apart of many supercontinents - While Pangaea, that existed between 150-300 million years ago is the most well-known, prior to that was Nuna (1.8 billion years ago), Rodina (1 billion years ... | <urn:uuid:2d0e9c93-cfc6-4a81-aac7-dc1b77fe6e90> | {
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Researchers at New Jersey Institute of Technology (NJIT) have developed an inexpensive solar cell that can be painted or printed on flexible plastic sheets.
“Someday, homeowners will even be able to print sheets of these solar cells with inexpensive home-based inkjet printers. Consumers can then slap the finished produ... | <urn:uuid:ebbdca74-3fac-402d-ad43-fe49594f0872> | {
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|This is a measure of the brightness of a celestial object. The lower the value, the brighter the object, so magnitude -4 is brighter than magnitude 0, which is in turn brighter than magnitude +4. The scale is logarithmic, and a difference of 5 magnitudes means a brightness difference of exactly 100 times. A difference... | <urn:uuid:a13e5774-8a15-4ad6-bc01-def7c66a2edb> | {
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One of the basic tenets of teaching is that the student must learn the basics and foundation of a subject in order for them to master it eventually and reach full human potential.
New research from the University of Missouri supports this notion, revealing that kids who understood numbers and quantity in the first grad... | <urn:uuid:513a84c9-3d3f-460a-87c7-d93d6bdabc54> | {
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Leaf Characteristics (PK1) This set introduces simple vocabulary to describe the physical features of 40 North American tree, garden, and house plant leaves. First - The child sorts 9 leaf characteristics cards (3" x 4") onto 3 control cards (10-3/8” x 5¼”) that identify characteristics of Leaf Types, Leaf Veins, and L... | <urn:uuid:d8d399d3-71ef-4f88-8432-8aa6553e707a> | {
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Scientists gets further evidence that Mars once had oceans
Mars, our neighbor, once the dreams of science fiction writers and astronomers, one of which only wrote about the live that could have lived on Mars, and still might; while the other seeks to prove that there might actually have been life on that red planet eon... | <urn:uuid:40e4be34-8172-4949-b887-cd566fea95cb> | {
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The Current Surface Analysis map shows current weather conditions
, including frontal and high/low pressure positions, satellite infrared
(IR) cloud cover
, and areas of precipitation
. A surface weather analysis is a special type of weather map that provides a view of weather elements over a geographical area at a spe... | <urn:uuid:4bf6a042-4fef-41c6-a3c8-799ab5420858> | {
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The knowledge, skills and understandings relating to students’ writing have been drawn from the Statements of Learning for English (MCEECDYA 2005).
Students are taught to write a variety of forms of writing at school. The three main forms of writing (also called genres or text types) that are taught are narrative writi... | <urn:uuid:817d308c-adeb-427a-9b89-415a8f96d2ec> | {
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LESSON ONE: Transforming Everyday Objects
Marcel Duchamp: Bicycle Wheel, bicycle wheel on wooden stool, 1963 (Henley-on-Thames, Richard Hamilton Collection); © 2007 Artists Rights Society (ARS), New York/ADAGP, Paris, photo credit: Cameraphoto/Art Resource, NY
Man Ray: Rayograph, gelatin silver print, 29.4×23.2 cm, 192... | <urn:uuid:31fab53b-eb78-4e38-ae2c-77d787710125> | {
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OurDocuments.gov. Featuring 100 milestone documents of American history from the National Archives. Includes images of original primary source documents, lesson plans, teacher and student competitions, and educational resources.
In 1866 the Russian government offered to sell the territory of Alaska to the United States... | <urn:uuid:8182aa95-78e2-42b3-a86d-30bb1a0fa8f8> | {
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Filed under: Foundational Hand
After studying the proportions of the Foundational Hand letters, the next step is to start writing the letters.
Each letter is constructed rather than written. The letters are made up of a combination of pen strokes, which are only made in a top – down or left – right direction. The pen i... | <urn:uuid:ebc9b632-c27d-4adb-85bd-b11864ab1adf> | {
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In January 1992, a container ship near the International Date Line, headed to Tacoma, Washington from Hong Kong, lost 12 containers during severe storm conditions. One of these containers held a shipment of 29,000 bathtub toys. Ten months later, the first of these plastic toys began to wash up onto the coast of Alaska.... | <urn:uuid:dfd00b67-c3db-464f-93c1-6d6c5508de9d> | {
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In mathematics, hyperbolic functions are analogs of the ordinary trigonometric, or circular, functions. The basic hyperbolic functions are the hyperbolic sine "sinh" (typically pronounced /ˈsɪntʃ/ or /ˈʃaɪn/), and the hyperbolic cosine "cosh" (typically pronounced /ˈkɒʃ/), from which are derived the hyperbolic tangent ... | <urn:uuid:34eefbfb-968b-4240-9caa-0182a3ca0559> | {
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Learn something new every day More Info... by email
A block diagram is a graphical method used to explain the concept of a system without the need to understand the individual components within that system. This type of diagram might be used in a variety of industries to illustrate and educate individuals about how a s... | <urn:uuid:2c34c5c0-a1b4-4d46-b4ea-5cdd8086df4a> | {
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Researchers at Stanford University have brought about a unique marriage between computer chips and living cells that could greatly accelerate everything from tests for new drugs to screening for diseases such as leukemia.
The basic living element in every organism is the cell. Humans have at least 100 trillion of them,... | <urn:uuid:25d0a31b-a38a-423e-a508-770337d9c34f> | {
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Hydrothermal circulation in its most general sense is the circulation of hot water; 'hydros' in the Greek meaning water and 'thermos' meaning heat. Hydrothermal circulation occurs most often in the vicinity of sources of heat within the Earth's crust. This generally occurs near volcanic activity, but can occur in the d... | <urn:uuid:0e4197df-03b2-41c6-9c75-3c14bfc507e3> | {
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Naval aviation is the application of military air power by navies, including ships that embark fixed-wing aircraft or helicopters. In contrast, maritime aviation is the operation of aircraft in a maritime role under the command of non-naval forces such as the former RAF Coastal Command or a nation's coast guard. An exc... | <urn:uuid:dce24d4c-ba86-4eb1-8f8c-4d1458a66b64> | {
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Science Fair Project Encyclopedia
Trier (French: Trèves), is Germany's oldest city. It is situated on the western bank of the Moselle River in a valley between low vine-covered hills of ruddy sandstone. It is located in the state of Rhineland-Palatinate near the German border with Luxembourg. Trier had around 100,000 i... | <urn:uuid:70ae6338-65ea-4c96-b633-8e96a8846182> | {
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Surface area is a two-dimensional property of a three-dimensional figure. Cones are similar to pyramids, except they have a circular base instead of a polygonal base. Therefore, the surface area of a cone is equal to the sum of the circular base area and the lateral surface area, calculated by multiplying half of the c... | <urn:uuid:8c57b621-6116-4614-a9fc-c31bd7ee9c11> | {
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Use the Activities
Putting It All Together
All the events prior to and during the American Revolutionary War in central New York are interrelated, and these had profound effects on the people who lived there. In these activities, students will compare their lives in their community to what it would be like to live in c... | <urn:uuid:9c761991-f1fc-409e-99b2-0967d23bc295> | {
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In this lecture you will learn how to undertake Solving Quadratic Systems. First you will start with Linear Quadratic Systems as well as their Solutions, before you move into Quadratic Quadratic Systems and their Solutions. Lastly, you will learn how to solve Systems of Quadratic Inequalities.
linear-quadratic system, ... | <urn:uuid:11f102ce-459d-4c2d-8912-6980537bf6dc> | {
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Magnetic Resonance Imaging (MRI)
Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to make pictures of organs and structures inside the body. In many cases MRI gives different information about structures in the body than can be seen with an X-ray, ultrasound, or comp... | <urn:uuid:7f30a731-3566-4958-a617-c1d4d728fdb0> | {
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In 2006, high sea temperatures caused severe coral bleaching in the Keppell Islands, in the southern part of the reef — the largest coral reef system in the world. The damaged reefs were then covered by a single species of seaweed which threatened to suffocate the coral and cause further loss.
A "lucky combination" of ... | <urn:uuid:5e2f2baf-ab5a-40e4-ad86-116c02b20572> | {
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Earth from Space: Easter Island
Easter Island as seen by astronauts aboard the International Space Station on Sept. 25, 2002.
On Easter Sunday in 1722, Dutch explorer Jacob Roggeveen became the first known European to encounter this Polynesian island and gave it the name it has become most widely known by.
Easter Islan... | <urn:uuid:02e8e579-65c8-4c0a-b405-7a29e289fea9> | {
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High blood pressure, or hypertension, affects almost one in three adults in the United States. However, this serious health condition isn't limited to just those ages 18 and older.
The number of children and adolescents with high blood pressure is increasing. This rise can be partly blamed on the increasing number of o... | <urn:uuid:83301d2b-55fc-46d7-9610-72e8d22fefa8> | {
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During this tutorial you will be asked to perform calculations involving trigonometric functiions. You will need a calulator to proceed.
| The purpose of this tutorial
is to review with you the elementary properties of the trigonometric functions.
Facility with this subject is essential to success in all branches of sc... | <urn:uuid:00f865ac-a066-4877-8d69-479bd1350ad2> | {
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Let's Talk About: Cosmic collisions
Share with others:
It has been almost 100 years since Edwin Hubble measured the universe beyond the Milky Way Galaxy. Today, astronomers believe that as many as 100 billion other galaxies are sharing the cosmos. Most of these cosmic islands are classified by shape as either spiral or... | <urn:uuid:ebb1ace8-11cc-4b0f-87f2-0f8f23923491> | {
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Modeling is the process of taking a shape and molding it into a completed 3D mesh. The most typical means of creating a 3D model is to take a simple object, called a primitive, and extend or “grow” it into a shape that can be refined and detailed. Primitives can be anything from a single point (called a vertex), a two-... | <urn:uuid:cbdd5ef3-8a0e-4e76-9220-168c785b09a8> | {
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"language... |
Is there such a thing as too much money?
by Fred E. Foldvary, Senior EditorWhat is inflation? There are two economic meanings of inflation. The first meaning is monetary inflation, having to do with the money supply. To understand that, we need to understand that the impact of money on the economy depends not just on t... | <urn:uuid:accf12a7-8aaf-4627-9f32-8cccc672aeeb> | {
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Indian removal had been taking place in the United States since the 18th Century as more Americans made the move westward. In the early 19th Century, Andrew Jackson and the majority of white Americans like him, wanted the Indians to move west of the Mississippi, out of the way from white expansion. Popular thought was ... | <urn:uuid:323ada14-c2ab-40ad-a3b6-39c9c51e30e5> | {
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There are many techniques available to help students get started with a
piece of writing. Getting started can be hard for all levels of writers.
Freewriting is one great technique to build fluency. That was
explored in an earlier lesson plan: http://www.thirteen.org/edonline/adulted/lessons/lesson18.html
This unit offe... | <urn:uuid:8337696e-d794-475f-9207-8e5f70d2fabe> | {
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No one knows how the first organisms or even the first organic precursors formed on Earth, but one theory is that they didn't. Rather, they were imported from space. Scientists have been finding what looks like biological raw material in meteorites for years, but it's usually been shown to be ground contamination. This... | <urn:uuid:3687b7dc-36d0-40be-aad4-b342f2eaf02b> | {
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Given all the evidence presently available, we believe it entirely reasonable that Mars is inhabited with living organisms and that life independently originated there
The conclusion of a study by the National Academy of Sciences in March 1965, after 88 years of surveying the red planet through blurry telescopes. Four ... | <urn:uuid:132d7809-ba28-4c89-8ce0-867a2a81c1e6> | {
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As the years tick by with most of the planet doing little in the way of reducing carbon emissions, researchers are getting increasingly serious about the possibility of carbon sequestration. If it looks like we're going to be burning coal for decades, carbon sequestration offers us the best chance of limiting its impac... | <urn:uuid:0f4b5328-483d-437b-b4b6-8cf4bfa3968b> | {
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Chandra "Hears" a Supermassive Black Hole in Perseus
A 53-hour Chandra observation of the central region of the Perseus galaxy cluster (left) has revealed wavelike features (right) that appear to be sound waves. The features were discovered by using a special image-processing technique to bring out subtle changes in br... | <urn:uuid:7c5032f8-872f-474b-bda7-8c70bc31adaa> | {
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SL Psychology/Intro to Research Methods
The following items should be included in this section: The Hypothetico-deductive (scientific)method, types of psychological research methods, research designs, sampling, reliability, validity, and triangulation.
Research into mind can be traced back to Ancient Greece. However, e... | <urn:uuid:defcc62e-94ff-4b7f-9ff7-845347fa405d> | {
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The Farmers Alliance
The populist movement first came into being in small communities far from any cities or centers of political or cultural activity. During the summer of 1890 farm families in the agrarian South and West gathered in their respective areas to discuss their problems. At these gatherings, agrarian famil... | <urn:uuid:c33d073b-2ea0-475d-accb-a6ce40ed0fd8> | {
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Mario Schenberg, Brazil’s most important theoretical physicist, who researched the formation of supernova stars, was born in Recife on this date in 1914. In the 1940s, together with Indian physicist and Nobel laureate Subrahmanyan Chanrasekhar, he discovered the Schenberg-Chandrasekhar limit, which is the maximum mass ... | <urn:uuid:bfddf4ad-3eec-48fc-951c-80a9c0d0b740> | {
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Sickle cell disease. It's a strange sounding name — and, no, the word "sickle" isn't related to "sick." The disease got this name because it causes blood cells to be curved or C-shaped, like the shape of an old-fashioned farm tool called a sickle.
Normally, blood cells are round and look a bit like donuts. In people wi... | <urn:uuid:3628f2cc-64aa-4beb-a0ae-8269cadc74fc> | {
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|U.S. Naval Observatory||Earth Orientation Department|
In 1956, following several years of work, two astronomers at the U. S. Naval Observatory (USNO) and two astronomers at the National Physical Laboratory (Teddington, England) determined the relationship between the frequency of the Cesium atom (the standard of time)... | <urn:uuid:ad3517d5-9fdc-41be-abb7-3b5ca1eaa42c> | {
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The research, which is featured on the cover of the July 17, 2005 issue of The Journal of Experimental Medicine, focused on the major human pathogen Staphylococcus aureus and the characteristic yellow-orange color for which it is named ("aureus" is Latin for "golden").
Among the deadliest of all disease-causing organis... | <urn:uuid:3c96fe0a-54d6-4eb5-a657-efb04f563b88> | {
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The steps by which molecules in the primordial soup came together to form the genetic backbone of life are largely unknown. One approach to finding out is to artificially create basic life functions in the laboratory and consider if such conditions might have been possible in the Earth’s past. Writing in Physical Revie... | <urn:uuid:4667167f-2026-4584-834a-5892652dce7e> | {
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When the Manchu ruled China during the Qing Dynasty, certain social strata emerged. Among them were the Banners, mostly Manchu, who as a group were called Banner People.
Manchu women typically wore a one-piece dress that came to be known as the cheongsam. The qipao fitted loosely and hung straight down the body. You ca... | <urn:uuid:6f89fcf0-c3ef-4ca1-b24f-2f378b39b848> | {
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Light glowing from a "super-Earth" planet beyond our solar system has been detected by Nasa’s Spitzer Telescope.
Until now, scientists have never been able to detect infrared light emanating from 55 Cancri E, a super-hot extrasolar planet twice the size and eight times the mass of our own.
55 Cancri E is one of five ex... | <urn:uuid:ee2e220e-a6e4-4be3-b81d-28773e170e84> | {
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The Savage Islands, or Ilhas Selvagens in Portuguese, are a small archipelago in the eastern North Atlantic Ocean between the archipelago of Madeira to the north and the Canary Islands to the south. Like these other island groups, the Savage Islands are thought to have been produced by volcanism related to a mantle plu... | <urn:uuid:e698619d-b5f7-457e-a7c2-18345ce4f693> | {
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In 1621, the Plymouth colonists and Wampanoag Indians shared an autumn harvest feast that is acknowledged today as one of the first Thanksgiving celebrations in the colonies. For more than two centuries, days of thanksgiving were celebrated by individual colonies and states.
It wasn't until October 1777 that all 13 col... | <urn:uuid:edb5a441-8784-4e07-bb35-02826d98185c> | {
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Why does this galaxy have so many big black holes?
No one is sure.
What is sure is that
NGC 922 is a ring galaxy created by the collision of a large and small galaxy about
300 million years ago.
Like a rock thrown into a pond, the
ancient collision sent ripples of
high density gas out from the impact point near the cen... | <urn:uuid:3231bdb9-63f9-4af7-ba27-fa67dc6013bb> | {
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Torque is an important factor in much of the equipment on a factory floor. Measuring torque is often something that's misunderstood, which can lead to over- under-designing of measurement systems. This article addresses the many techniques and tradeoff of torque measurement techniques.
Torque can be divided into two ma... | <urn:uuid:7e584480-c9d7-4240-b445-695a01167c63> | {
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How Beans Grow
by National Gardening Association Editors
If you've ever walked by containers of bulk seed in a garden store, you may have been surprised by the many different colors, sizes and shapes of the beans -- even by the variety of designs on the seed coats and their descriptive names: 'Soldier', 'Wren's Egg', '... | <urn:uuid:c093810a-407f-4b82-8b42-656f230c30e1> | {
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- Hypothermia occurs when the body's core temperature drops below 37°C.
- This typically results from prolonged exposure to cold conditions, especially in damp, wet or snowy weather.
- Early signs: shivering; listlessness; cold, pale, puffy face; impaired speech and impaired judgment.
- Later signs: drowsiness, weaknes... | <urn:uuid:a2ba41f1-bb16-4bb4-ae10-76981841b1f9> | {
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Most common smoke detectors (Fig. 13-2) contain a small amount of 241Am, a radioactive isotope. 241Am is produced and recovered from nuclear reactors. Alpha particles emitted by the decays of 241Am ionize the air (split the air molecules into electrons and positive ions) and generate a small current of electricity that... | <urn:uuid:7c528fd1-8760-4d5e-898c-fba0c1ae355c> | {
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Lesson Plans and Worksheets
Browse by Subject
Blood Teacher Resources
Find teacher approved Blood educational resource ideas and activities
A series of diagrams and photographs is a vivid tool for delivering a lesson about blood vessels. Each slide has notes for the lecturer to use to explain each slide. Your young bio... | <urn:uuid:38c78de4-6fd8-4840-9a4b-d7d98773d9ef> | {
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Carl Friedrich Gauss (1777-1855) is considered to be the greatest German mathematician of the nineteenth century. His discoveries and writings influenced and left a lasting mark in the areas of number theory, astronomy, geodesy, and physics, particularly the study of electromagnetism.
Gauss was born in Brunswick, Germa... | <urn:uuid:19e829d4-ba9a-46ad-92b3-9e91526f1816> | {
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Spider silk can be scary enough to insects to act as a pest repellant, researchers say.
These findings could lead to a new way to naturally help protect crops, scientists added.
Spiders are among the most common predators on land. Although not all spiders weave webs, they all spin silk that may serve other purposes. Fo... | <urn:uuid:2bf9f9b2-3cdc-4ce4-979e-a8d74b24efa5> | {
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Standing Bear in his formal attire
National Anthropological Archives, Smithsonian Institution
On their journey westward in 1804, Lewis and Clark learned about the Ponca, a small tribe living on the west bank of the Missouri River and along what are now the lower Niobrara River and Ponca Creek in northeast Nebraska. The... | <urn:uuid:fdc02ec5-7827-476b-a491-e9263d13bcc0> | {
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S-1. Sunlight & Earth
S-1B. Global Climate
S-3.The Magnetic Sun
S-4. Colors of Sunlight
Optional: Doppler Effect
S-4A-1 Speed of Light
S-4A-2. Frequency Shift
S-4A-3 Rotating Galaxies
and Dark Matter
S-5.Waves & Photons
Optional: Quantum Physics
Q3. Energy Levels
Q4. Radiation from
One widely used property of waves is ... | <urn:uuid:9268091d-e08f-49a1-9c2a-bfdc6d447834> | {
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Teacher's Resources - A Question of Ritual
For the people of the ancient Americas as for many other humans worldwide, ceremonies formed a bridge between their world and that of deities and spirits. Through sacred rituals they communicated to their gods and ancestors their hopes for a bounty of food, protection from the... | <urn:uuid:45964684-0e7b-4afe-9a67-a3dadf9ff5d0> | {
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Until the Aswan High Dam was built, Egypt received a yearly inundation - an annual flood - of the Nile. The ancient Egyptians did not realise this, but the flood came due to the heavy summer rains in the Ethiopian highlands, swelling the different tributaries and other rivers that joined and became the Nile. This happe... | <urn:uuid:40a922c3-bf31-46e4-ae3c-63d90ee50283> | {
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"language_score"... |
Want to stay on top of all the space news? Follow @universetoday on Twitter
Currently, astronomers have two competing models for planetary formation. In one, the planets form in a single, monolithic collapse. In the second, the core forms first and then slowly accretes gas and dust. However, in both situations, the pro... | <urn:uuid:dd183d74-6efe-4b52-a5fd-55d21cf5c3b4> | {
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The Philippines had suffered under the Japanese occupation. A highly effective guerilla campaign controlled sixty percent of the islands, mostly jungle and mountain areas. MacArthur had supplied them by submarine, and sent reinforcements and officers. Filipinos remained loyal to the United States, partly because of the... | <urn:uuid:62c223bb-a66e-4c40-81be-9f23e4e46529> | {
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"file_path": "s3://commoncrawl/crawl-data/CC-MAIN-2013-20/segments/1368706499548/warc/CC-MAIN-20130516121459-00000-ip-10-60-113-184.ec2.internal.warc.gz",
"language": "en",
"language_scor... |
Evidence from caves in Siberia indicates that a global temperature increase of 1.5° Celsius may cause substantial thawing of a large tract of permanently frozen soil in Siberia. The thawing of this soil, known as permafrost, could have serious consequences for further changes in the climate.
Permafrost regions cover 24... | <urn:uuid:867e4ca7-5a93-4c6d-b021-8088aa153645> | {
"dump": "CC-MAIN-2013-20",
"url": "http://arstechnica.com/science/2013/02/small-rise-in-global-temperatures-could-thaw-permafrost/",
"date": "2013-05-18T17:27:30",
"file_path": "s3://commoncrawl/crawl-data/CC-MAIN-2013-20/segments/1368696382584/warc/CC-MAIN-20130516092622-00000-ip-10-60-113-184.ec2.internal.w... |
Storytelling in the Classroom
Storytelling is not the same as reading aloud because it requires greater interaction between the teller and the listener. Therefore, storytelling is a great tool for improving children's communication skills, as well as developing language skills, comprehension, and self-awareness. (Readi... | <urn:uuid:16cca657-1e65-4040-9db7-6bc51ce437c3> | {
"dump": "CC-MAIN-2013-20",
"url": "http://bblocks.samhsa.gov/educators/lesson_plans/teachingwithstories.aspx",
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"language":... |
What's the Latest Development?
Using location data gathered by personal mobile phones, researchers from Carnegie Mellon University have created the first map that tracks the spread of malaria by examining movement patterns among Kenya's population. Between 2008 and 2009, researchers followed the movement of 15 millions... | <urn:uuid:8bee974a-a16f-4213-9552-52fa20c4d393> | {
"dump": "CC-MAIN-2013-20",
"url": "http://bigthink.com/ideafeed/how-mobile-phones-combat-the-spread-of-global-disease",
"date": "2013-05-18T17:58:26",
"file_path": "s3://commoncrawl/crawl-data/CC-MAIN-2013-20/segments/1368696382584/warc/CC-MAIN-20130516092622-00000-ip-10-60-113-184.ec2.internal.warc.gz",
"l... |
Douglass Jacobs, an associate professor of forestry and natural resources, found that American chestnuts grow much faster and larger than other hardwood species, allowing them to sequester more carbon than other trees over the same period. And since American chestnut trees are more often used for high-quality hardwood ... | <urn:uuid:ade2c38d-a45b-4987-9c84-8d2fc184da53> | {
"dump": "CC-MAIN-2013-20",
"url": "http://carbon-based-ghg.blogspot.com/2009/06/reviving-american-chestnuts-may.html",
"date": "2013-05-18T18:06:18",
"file_path": "s3://commoncrawl/crawl-data/CC-MAIN-2013-20/segments/1368696382584/warc/CC-MAIN-20130516092622-00000-ip-10-60-113-184.ec2.internal.warc.gz",
"la... |
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