Acids and Bases: Cabbage Juice Indicator
In this video segment, the ZOOM cast demonstrates how to use cabbage juice to find out if a solution is an acid or a base.
A nonsense sentence is provided and children are required to work out the answers to some questions.
Parallel Axes Theorem
Fact-sheet with a worked example on the use of the parallel axes theorem.
"I Will Kill Frick": Emma Goldman Recounts the Attempt to Assassinate the Chairman of the Carnegie S
Henry Clay Frick, chairman of the Carnegie Steel Company, was demonized by labor for his role in the violent Homestead strike in 1892 in which a pitched battle was fought between strikers and company-hired Pinkerton detectives. Known for his uncompromising and cruel tactics, Frick became an obvious target for labor activists looking to make a statement during the protracted strike. In this excerpt from her autobiography, Living my Life, radical Emma Goldman described how fellow radical Alexander
"I Started Filling Rifles": A Woman Strike Supporter Remembers the 1914 Ludlow Massacre
The brutal southern Colorado coal strike reached its nadir on Easter night, 1914, with the horrendous deaths by fire of three women and eleven children at the hands of the Colorado state militia. Mary Thomas, whose husband was on strike, was interviewed at age eighty eight by historian Sherna Gluck in 1974 for the Feminist History Research Project. Thomas vividly recalled the horror of the infamous Ludlow Massacre, described her efforts to save the lives of women and children by hiding them in a
"I Always Had Pads with Me": A G.I. Artist's Sketchpad, 1943-1944
In the wake of the attack on Pearl Harbor and the declaration of war, thousands of Americans enlisted in the U.S. armed forces. Among them was twenty-year-old Bronx resident Ben Hurwitz. Like many of the men and women who entered military service, Hurwitz (who changed his name to Brown after the war) kept a record of his experiences. But his "journal" was a sketchpad, and, during his two years in North Africa and Italy, Corporal Hurwitz drew and painted at every opportunity. Hurwitz's pictures a
Beyond Bed Pans: The Life of a Late 19th-century Young Nurse
In this autobiographical account of the life that awaited new nursing recruits in 1893, former nurse Mary Roberts Rinehart painted a vivid portrait of the daily obstacles that stood between nurses and the professional status they hoped to attain. Rinehart described the "simple, plain hell" faced by the young nurse, a description that challenged conventional expectations about professional work.
Booker T. Washington Delivers the 1895 Atlanta Compromise Speech
On September 18, 1895, African-American spokesman and leader Booker T. Washington spoke before a predominantly white audience at the Cotton States and International Exposition in Atlanta. His "Atlanta Compromise" address, as it came to be called, was one of the most important and influential speeches in American history. Although the organizers of the exposition worried that "public sentiment was not prepared for such an advanced step," they decided that inviting a black speaker would impress No
"We Didn't Have Flies Until the White Man Came": A Yankton Sioux Remembers Life on the Plains in the
In the era before the U. S. Army conquered the Great Plains Indians the region's giant buffalo herds provided the primary food and clothing source for the Indians who lived there. Indeed, in 19th century America buffalo were more numerous than people. The various Lakota Sioux tribes who lived in the area that became South Dakota and Nebraska depended largely on the buffalo hunt according to Paul Picotte, a Yankton Sioux born in 1880. In this transcript of a 1968 interview with historian Joseph C
A Mule Spinner Tells the U.S. Senate about Late 19th century Unemployment
Fall River, Massachusetts, mill worker Thomas O'Donnell (who had immigrated to the U.S. from England eleven years earlier) appeared before the U.S. Senate Committee on Education and Labor on October 18, 1883, to answer the panel's questions about working-class economic conditions. An unemployed mule spinner for more than half of the year, he described the introduction of new production methods at the Fall River, Massachusetts, textile factory where he worked as a mule spinner (a worker who tende
American Soldiers in the Philippines Write Home about the War
During the U.S. war in the Philippines between 1899 and 1904 (which grew out of the Spanish-American War that had erupted in 1898), ordinary American soldiers shared the nationalist zeal of their commanders and pursued the Filipino "enemy" with brutality and sometimes outright lawlessness. Racism, which flourished in the United States in this period, led American soldiers to repeatedly assert their desire "to get at the niggers." An anti-imperialist movement, which rejected annexation by the Uni
"Everything Was Lively": David Hickman Describes the Prosperity Late Nineteenth-Century Railroads Br
The availability of rail connections often determined whether a western community would survive or die. The rails fostered prosperity by bringing both goods and people. This trade, and the local service industries that sprouted up to capitalize on the movement of people and goods, drove many local economies. Here, David Hickman talked about the boom years that followed the arrival of the railroad in the Latah County, Idaho town of Genesee in the 1880s.
"Cast Down Your Bucket Where You Are": Booker T. Washington's Atlanta Compromise Speech
In 1895, Booker T. Washington gave what later came to be known as the Atlanta Compromise speech before the Cotton States and International Exposition in Atlanta. His address was one of the most important and influential speeches in American history, guiding African-American resistance to white discrimination and establishing Washington as one of the leading black spokesmen in America. Washington's speech stressed accommodation rather than resistance to the racist order under which Southern Afric
"It Didn't Pan Out as We Thought It Was Going To"Amos Owen on the Indian Reorganization Act
The Indian Reorganization Act of 1934, which became known as the Indian New Deal, dramatically changed the federal government's Indian policy. Although John Collier, the commissioner of Indian affairs who was responsible for the new policy, may have viewed Indians with great sympathy, not all Native Americans viewed the Indian New Deal in equally positive terms. In this 1970 interview with historian Herbert T. Hoover, Amos Owen, Mdewakanton Sioux tribal chairman, gave a mixed verdict on the Indi
"I Glanced Up--The Statue of Liberty!": Emma Goldman Describes Her Deportation in the Era of the Red
After World War I, a "red scare" gripped the United States. One reflection of this climate of hysteria was in the "Palmer raids" on radicals. Striking without warning and without warrants, Attorney General A. Mitchell Palmer's men smashed union offices and the headquarters of Communist and Socialist organizations. They concentrated whenever possible on aliens rather than citizens, because aliens had fewer rights. In December 1919, in their most famous act, Palmer's agents seized 249 resident ali
"We Ought to Have the Right to Belong to the Union": Frank Smith Speaks on the 1919 Steel Strike
In the dramatic 1919 steel strike, 350,000 workers walked off their jobs and crippled the industry. The U.S. Senate Committee on Education and Labor set out to investigate the strike while it was still in progress. In his testimony before the committee, Hungarian-born Frank Smith, a Clairton worker, used his support for the war effort as evidence of his Americanism. "This is the United States," he argued, "and we ought to have the right to belong to the union."
"We Had to Be So Careful" A German Farmer's Recollections of Anti-German Sentiment in World War I
German Americans had a complex response to the attacks on their loyalty that emerged when the United States went to war against Germany in 1917. During and after the war, many German Americans began to conceal their ethnic identity--some changed their names; others stopped speaking German; still others quit German-American organizations. Many, like Frank Brocke, son of a German-American farmer, tried to keep a low profile. In this interview, Frank Brocke discussed his own assimilation (he later
"We Do Not Understand the Foreigners": John J. Martin Testifies on the 1919 Steel Strike
In the dramatic 1919 steel strike, 350,000 workers walked off their jobs and crippled the industry. The U.S. Senate Committee on Education and Labor set out to investigate the strike while it was still in progress. In his testimony before the committee, Youngstown steelworker John J. Martin expressed puzzlement over the grievances of the striking steelworkers and maintains that "the foreigners brought the strike on."
Ice Core Gateway: Vostok Ice Core CO2 Data
The Vostok ice core has a long record of global carbon dioxide concentrations, with variations caused by factors other than photosynthesis and human activity. Ice core data sets from three different authors are available for download. Users can also link to other NOAA paleoclimate projects and information.
Reinforcing quantitative skills with applied research on tombstone-weathering rates.
This Journal of Geoscience Education article describes a tombstone weathering exercise that reinforces quantitative skills with applied research. The article describes an exercise designed and carried out by students in a surficial processes course. Students measured the rates of tombstone weathering, compiled and analyzed data. The complexity of the data involved in this exercise helps students demonstrate for themselves that mathematical analysis can give meaning to data.