The desert biome is characterized by low precipitation, a high rate of evaporation (seven to fifty times as much as precipitation), and a wide daily range in temperature. The dramatic temperature fluctuations are the result of low humidity, which allows up to 90 percent of solar radiation to penetrate the atmosphere and heat the ground during the day, then for this accumulated heat to be released back into the atmosphere at night. Precipitation in deserts, unlike other biomes, is highly irregula
Witness the destructive power of earthquakes, from home videos taken during a tremor. Video goes inside the Earth to show how an earthquake starts. Earth is covered by plates, when the plates are moved by the heat of the inner Earth, they grind against each other along lines called faults. When the plates motion is blocked stress builds up, finally the fault gives way. The released energy moves through the Earth called seismic waves. Sei
ZEN DEN: Power of the Sea
During the summers of 2007 and 2008, year-round Arctic sea ice shrank to its lowest level since satellite records began 30 years ago. Some scientists now predict an ice-free Arctic summer by 2012. As snow and ice levels decline, sea-levels and weather patterns are affected which in turn impact plant, animal, and human life. Run time 02:05.
Weather and Climate Video discussed seasons and where are there changes in seasons. The four seasons are; summer, fall/autumn, winter, spring. The northern and southern hemispheres experience opposite seasons. The seasons are caused by the tilt of the Earth at a 23 and a half degree angle and the orbit around the sun. Different parts of the Earth are closer to the sun at different times of the year. The seasons are measured in Equinoxes (March
Video discussed seasons and where are there changes in seasons. The four seasons are; summer, fall/autumn, winter, spring. The northern and southern hemispheres experience opposite seasons. The seasons are caused by the tilt of the Earth at a 23 and a half degree angle and the orbit around the sun. Different parts of the Earth are closer to the sun at different times of the year. The seasons are measured in Equinoxes (March
Understanding Shakespeare's Sonnets
In the year of the 400th anniversary of Shakespeare's sonnets (1609)Professors Stanley Wells, CBE, and Jonathan Bate, CBE, talk to Paul Edmondson about the content of these love sonnets. (37:58)
What is the Solar Cycle? (continued)
Part 2 "What is the solar cycle?" Joe Borovsky – Los Alamos National Lab. Examines space data from satellites. The effects of the solar wind on the earth changes with the solar year wind changes. Examines solar communication disruption during the geomagnetic storms. Run time 02:31.
Beethoven-Overcoming Dispair with Work
Returning to Vienna, the thirty-five-year-old Beethoven responded to his growing deafness by surrounding himself with work. He thought an opera would be a good endeavor.
In a groundbreaking move, he composed an opera - originally called Leonore (and later reworked as Fidelio) - with a female lead. Unfortunately, Leonore opened to a small crowd, even though Beethoven used a famous singer of the day - Anna Milder - to perform the main role.
Beethoven, once again, had to endure
Introduction to the Atom
In most topics you have to get pretty advanced before you address the most philosophical things. But in chemistry, it starts right from the beginning with what is arguably the most philosophically interesting part of the whole topic, and that's the atom. The word "atom" is actually Greek for the word "uncuttable." Instructor uses his computer screen and different colors to inform students about the atom in plain English. Instructor says this video introduces information covered in a firs
The Liturgical Year
A brief summary of the Church year, also known as the Liturgical Year, which does not follow the Gregorian Calendar.
Veronica Hill of California Travel Tips explores the magnificent Hearst Castle in San Simeon. Perched on a hilltop 1,600 feet above the crashing waves of the Pacific, Hearst's magnificent Castle is located halfway between LA and San Francisco near the town of Cambria. June 2008 marked 50 years since the castle opened to the public. Today, it draws more than 1 million visitors a year.
Going Bovine - Libba Bray Interview
Interview with Linda Bray. She talks about her book for teens. The story is about 16-year-old Cameron who wants is to get through high school and life in general with a minimum of effort. Its not a lot to ask. But that's before he's given some bad news: he's sick and hes going to die.
The Power of One
This motivational video is set to music with various images and thoughts running across the screen. It encourages "one random act of kindness" and would be nice motivation for students and/or teachers at the start of a new school year. Run time 02:58.
All the World is Human Part 4 - Conquistadors
In this video from BBC, Michael Wood continues his study of the Conquistadors, beginning to focus on Cabeza de Vaca's Extraordinary 8 year Journey Across North America, and the Sierra Madre Mexico, along with the Aztecs. This video is another excellent addition to the series.
Black History: 1968 Olympics
Nicholas Love discussed the actions of Tommie Smith and John Carlos during the 1968 Olympic Games. The year of 1968 was a transitional year in the Civil Rights Movement. Tommie Smith and John Carlos entered the 200 meter final with winning on their mind. They took the gold and bronze medal in these Olympics, as they were on the podium getting their medals, they held up their fists in the Black Power Salute. For doing this they were suspend
Olympics, Ancient - Honors for the Athletes
So highly regarded were winning athletes, in the ancient Olympic games, that their names were used in the Greek calendar. People referenced events by the year that a particular champion prevailed in his sport.
What other honors were bestowed upon winning athletes in the ancient games? Take a look at the very beginning of this clip from Seven Wonders of Ancient Greece.
Malaria in sub-Saharan Africa
This video segment adapted from Rx for Survival examines malaria in sub-Saharan Africa, a disease that kills more than one million children there each year. It explains how a deadly parasite, a member of the genus Plasmodium, enters the bloodstream via a mosquito bite and how it multiplies once inside host red blood cells. The video reveals that drug counterfeiting has increased malaria's death toll, and that newer drugs, while more effective than older ones, are too expensive for most Africans
5 Year Old, Mia, Sing 50 Nifty United States
This video features a five year old little girl named Mia who confidently (and correctly) sings all 50 states in alphabetical order.
Each state is highlighted on the map behind Mia as she sings. Run time 02:14.
The Office of Management and Budget
The federal budget is a financial plan for the coming fiscal year. The budget describes the revenues the United States government expects to receive from various sources and also what it expects to spend on entitlements, interest on the debt, defense, and other programs. The budget functions as a blueprint for operating the government and for implementing federal policy. It expresses the intent of the federal government in financial terms. (Video is narrated with slides and speeches.)
"The Office of Management and Budget (OMB) follows a schedule for preparing the annual presidential budget. Their deadline is the first Monday in February when the president delivers his budget to Congress amid great fanfare. The Congress then has until October first, the beginning of the U.S. fiscal year, to review, revise, and approve the budget." (Video is of high quality with slides and narration.)
Autism Symptoms & Treatments : Diagnosing Autism
Video is presented by Dr. David Hill. There are some tests that a doctor can do, a nine month old who doesn’t know his name or doesn’t understand the word “no.” The most diagnosis of autism happens in the second year of life, often at 15 – 24 months, the test is known as the MCHAT. The pediatrician should be doing some testing at the wellness exams. If initial exams raise some concern, then the child will need to see a psychologi