Yeast Cells Respire, Too (But Not Like Me and You)
Students set up a simple way to indirectly observe and quantify the amount of respiration occurring in yeast-molasses cultures. Each student adds a small amount of baking yeast to a test tube filled with diluted molasses. A second, smaller test tube is then placed upside-down inside the solution. As the yeast cells respire, the carbon dioxide they produce is trapped inside the inverted test tube, producing a growing bubble of gas that is easily observed and measured. Students are presented with
How Big? Activity
The objective of Lesson 2, Activity 1 is for student teams to determine the size of the caverns. Lesson two has student teams measure their classroom to determine area and volume; determine how many people could comfortably sleep in their classroom; scale this number up to find the required area for all Alabraskans. The lesson provides a good application of area and volume concepts. Students also perform math conversions between feet, meters, miles and kilometers.
What to Wear? What to Drink? Weather Patterns and Climatic Regions
How does our climate affect us? How do we decide what to wear each day? What factors determine if our clothing choices are comfortable? What is the source of our water? Students explore characteristics that define climatic regions. They learn how tropical, desert, coastal and alpine climates result in different lifestyle, clothing, water source and food options for the people who live there. They learn that a location's latitude, altitude, land features, weather conditions, and distance from lar
Students discuss the characteristics of storms, including the relationship of weather fronts and storms. Using simple materials, the students develop a model of a simple lightning detection system and analyze their model to determine its effectiveness as a storm warning system for a community.
What Do Bread and Beer Have in Common?
Students are presented with information that will allow them to recognize that yeasts are unicellular organisms that are useful to humans. In fact, their usefulness is derived from the contrast between the way yeast cells and human cells respire. Specifically, while animal cells derive energy from the combination of oxygen and glucose and produce water and carbon dioxide as by-products, yeasts respire without oxygen. Instead, yeasts break glucose down and produce alcohol and carbon dioxide as th
The Ancient Romans - Quiz
Test your knowledge on the Ancient Romans
Junior Geography - Quiz
How well do you know your Geography?
Theme Shopping - Quiz
Check out your Gaeilge
General Knowledge - Quiz
General facts on world affairs.
The Last Days Remembered: A Compatriot Recalls the Deaths of Sacco and Vanzetti in 1927
The emotional and highly publicized case of Nicola Sacco and Bartolomeo Vanzetti became a touchstone and rallying cry for American radicals. In 1920 the two Italian immigrants were accused of murder and although the evidence against them was flimsy, they were readily convicted, in large part because they were immigrants and anarchists. They were executed, despite international protests, on August 23, 1927. Aldino Felicani, printer and publisher of the anarchist paper Controcorrente, was a long-t
UMass Amherst protest ends
A group of minority students exit the New Africa House on the campus of the University of Massachusetts at Amherst. The students hold a press conference in front of the media and a group of supporters. An African American male student reads a prepared statement, announcing the end of the occupation of the New Africa House. The student says that the protesters are pleased that the New Africa House will be restored as a cultural center for African American and third world students. He adds that th
Documentary told from the point of view of a middle-aged Dutch man who visits his older marine biologist brother who lives in the Galapagos Islands. He explores the nature, history, and inhabitants of the island while observing and commenting on his brother's ability to communicate with nature. Contains beautiful scenes of the islands and their wildlife, while subtly commenting on man's interference on the islands. Interesting in that approximately half of the work consists of still shots. In Ge
Lies and Humiliations
'Brazilian artist Eder Santos tells the story of an elderly woman's reminiscence of an important relationship as seen through her possessions and the furniture in her home, which evoke memories of a shared lifetime.' This short piece shows the interior and exterior architecture of a house. Film footage is superimposed, and the outline of a figure sits down repeatedly. The words to a poem by Carlos Drummond de Andrade are incorporated. Music by Stephen Vitiello and James Kavoussi accompany the wo
'Collisions' was written by Jane Wagner and is an unusual comedy/drama. It stars Lily Tomlin and other well known performers, such as Dan Aykroyd and Gilda Radner. The work attempts to integrate short video works by Stephen Beck, Ed Emshwiller, Louis Falco, Ron Hays, Stan Vanderbeek, and William Wegman. 'Collisions' tells the story of Eartha, a creature from the planet of Zymus, who agrees to take a human form and to observe the planet earth. Eartha inhabits Beth Barber (Lily Tomlin), a news rep