Elementary School Tools is a site for sharing ideas and lesson plans. It is really new but the community is growing. As of today, I see eleven Halloween themed activity ideas.
Researchers at the University of New Mexico at Albuquerque looked a decade's worth of data, and showed that bicycle crashes are more likely to be deadly when the rider has been drinking, is an adult male, has a collision with a car, or is riding on a high-speed roadway. They also found that helmets have a significant protective effect, although they don't much help riders hit by cars. (The findings were presented at the American College of Emergency Physicians Annual Scientific Assembly.)
New pictures from the moon are drying up any ideas that its poles might have traces of ice that could hold water for future manned trips there.
The high-resolution images, shared in the recent edition of the journal Nature, dispute the theory of cold traps on the poles, particularly the moon’s south pole, where water particles were thought to possibly be found as ice. Radar shots from Earth can now look into these cold traps, which are permanently shaded craters on the moon’s south pole.
Such ice deposits have been found on the planet mercury using the same radar measurement techniques. But the latest images showed no traces of ice on the portions of the moon that radar imaging was done on.
Researchers point out that it doesn’t mean there is no ice on the moon’s south pole, just on the areas that were tested. But the bad news, to anyone thinking of making a manned mission to the moon, is that there probably wouldn’t be enough iced water on the pole to help support a long mission.
Six years ago, the Lunar Prospector orbiter found concentrations of hydrogen around the lunar poles. If that hydrogen could be combined with oxygen in some fashion, estimates were that there could be up to a 1 or 2 percent mixture of ice in the soil on the moon’s poles.
So if you’re planning on going to the moon anytime soon, still plan on bringing enough water for everyone in your party.
Autism is a serious concern in our country today, with 1 out of every 166 children diagnosed with some form of the disorder. But could the sharp rise in Autism (it was only 1 in 2500 30 years ago) be linked to the increased prevalence of TV in our homes? Economists from Cornell University say that the data shows a pretty strong correlation.
Michael Waldman and Sean Nicholson looked at populations in California, Oregon, and Washington using the Department of Labor's American Time Use Survey. They compared this information with clinical autism data and found a statistically significant correlation between and increase in early childhood hours spent watching TV and autism rates.
Well, the authors of the study will be the first to say that this isn't definitive proof that TV causes autism (or that autism causes TV...sorry, bad joke). And these guys are economists looking at population data not medical scientists studying individuals with autism. But that doesn't mean this study is without merit. Something in our environment causes autism and we don't really know what it is. I support any unique thought on the subject that gives us new research questions to evaluate.
Do you have a story or thought on autism? Have you heard of other possible causes of autism?
Physicist Kenneth Libbrecht used a high-resolution microscope to take pictures of snowflakes. These images were put on to four new 39-cent commemorative stamps by the United States Postal Service. The images were taken from snowflakes in Michigan, Alaska, and Ontario. To take the picture, Libbrecht used a paintbrush to transfer the snowflake onto a glass slide. He then took the picture using a digital camera through a high-resolution microscope. Libbrecht does most of his work outside to keep the snowflakes from melting. According to Libbrecht, there are 35 different types of snowflake crystals. The stamps feature two specific types, stellar dendrite snowflake crystals and sectored plate snowflake crystals.
Snowflakes are created when a water droplet inside a cloud freezes into an ice particle. The particle spreads out and becomes a six-sided prism as water vapor gathers on its surface. As more vapor accumulates, the prism grows branches and begins to look like a crystal. No two snowflakes are the same because, inside the cloud, the snowflake crystal is pushed around between temperature and humidity changes which affect the shape of the snowflake.
According to a graduate researcher at the Georgia Institute of Technology, giant pandas can see in color. Two pandas at Zoo Atlanta were tested over a period of two years, in numerous trials, to see if they could distinguish between colors and shades of gray. The bears were presented with three pipes- two pipes hanging over a shade of gray and one pipe hanging over a color, either red, green, or blue. If the bear chose the color, it received a treat. If it pushed a gray- labeled pipe, the bear got nothing. While the results of the tests for each color, red, green, and blue, were varied in their success, the results did prove that giant pandas have some color vision, though the level of vision they have remains in question. Reserachers say that the ability to see color could aid the bears in foraging for food, like being able to tell the difference between a patch of healthy, green bamboo and a patch of brown, dead bamboo.
I just signed up for the "Minnesota Energy Challenge". By pledging to reduce my energy use in specific ways, I will reduce CO2 emmissions and save dollars. I was given the option of adding my savings to a team of participants. I chose Saint Paul (which is beating Minneapolis 2905 to 2692 tons of CO2 saved). I wish the Science Museum of Minnesota had a team. I think it would be neat to have our staff, members, and visitors demonstrate that they are willing to "become the change they envision"(Ghandi). You can join up on the mnenergychallenge.org website.
The Minnesota Energy Challenge is a statewide initiative, developed by the Center for Energy and Environment" (CEE), to encourage every homeowner, renter, business owner, educator, worship leader, city manager and student to reduce their electricity and energy use. CEE has projected that a 2 percent annual reduction in electricity energy use will eliminate the need to build more coal-fired energy plants in Minnesota.
Minneapolis newscaster, Don Shelby, will be speaking at 7:30 p.m.
In addition to introducing the energy challenge, displays and demonstrations will cover topics such as energy-saving light bulbs, programmable thermostats, energy audits, high-efficiency furnaces, project financing, tax incentives, and preparing the home for the heating season. The first 500 attendees at each fair will receive free light bulbs, and there will be activities for the kids.
Thankyou missgo76 for alerting me about this on the Energista website.
What if Earth's oceans get so sick they start a chain reaction of death? Zones of death are showing up in the Gulf and off the coast of Oregon. The coral reefs off Madagascar, Australia, and Belize are dying.
More than 90 percent of the earth’s living biomass (weight of living matter) is found in the oceans, and 90 percent of that is made up of single cell and microbial species. ...
There are signs that marine life is failing right at the bottom of the food web as the result of global warming, which could start a series of aggravating feedback effects on climate change. Institute of Science in Society
"Increasing carbon dioxide in the atmosphere has had effects in the ocean, where it's causing increased acidity," says director of NSF's biological oceanography program, Phil Taylor, "This increasing acidity has the potential to disrupt the calcifying processes that lead to coral reef development, for example, as well as disrupt those same processes in the microscopic plankton that form the center of the ocean's food web." National Science Foundation
Since the industrial revolution began, ocean pH has dropped by approximately 0.1 units, and it is estimated that it will drop by a further 0.3 - 0.4 units by 2100 as the ocean absorbs more anthropogenic CO2 (Caldeira and Wickett, 2003; Orr et al., 2005) (via Wikipedia). Ocean life which use calcium carbonate find themselves dissolving when their environment is too acidic.
In a recent study, scientists discovered several small reefs near Madagascar with corals that appeared to be resilient to rising sea temperatures. These resilient areas could be used to reseed damaged reefs ensuring the continued existence of coral reefs around the world and the marine species that rely upon them for survival.
Coral bleaching should serve as a red flag warning us that we need to understand the complex interactions between changing ocean chemistry and marine ecology. We need to develop research strategies to better understand the long-term vulnerabilities of sensitive marine organisms to these changes.
Wind is usually stronger and more dependable at high altitudes. High towers are expensive, though. Why not use kites and strong string to capture power from high altitude winds?
This idea of using kites to generate electricity earned a 2006 World Renewable Energy Award.
The main idea of Kite Wind Generator is based on a vertical axis turbine whose blades are the flying airfoils. The plant is able to provide 1 GigaWatth/year, it is 25 metres high, it has a turbine radius of 800 metres and it requests ground wind speed of 3 m/sec to fully operate. The needed area is 4 km2, that is more than 80 times smaller than the area for the equivalent wind farm based on traditional eolic generators. The cost of this machine is around 300 Millions €, including transportation, installation, foundations and connection to the grid. World Renewable Energy Congress.
The way KiteGen works is to have a giant horizontal merry-go-round with kites attached to its perimeter. Sensors and controllers would fly the kites in a way that would spin the generators at its axis.(watch video simulation here).
Research by Sequoia Automation, the small company near Turin heading the project, estimates that KiteGen could churn out one gigawatt of power at a cost of just 1.5 euros per megawatt hour.
Outstanding questions about such a generator include location and possible bureaucratic headaches over permits for air space. Current speculation is that KiteGen may soar above the former Trino Vercellese nuclear power plant, already a no-fly zone, in the region.
Read more at Wired News.