Monday, October 3, 2011
If you are currently enrolled in one of my classes you can go here to view the virtual classroom: https://myecsd/schools/8405/Collaboration/Virtual%20Class%20Rooms/default.aspx
To login, use your school id and password.
Please contribute to the Team Discussion!
Sunday, September 11, 2011
This instructable shows you how to make your very own magnetic putty... and it is really easy!
See all the steps: http://www.instructables.com/id/magnetic-silly-putty/
Then you can play with it:
The shells, called tests, are made mainly of calcium carbonate, which the animals derive from carbon atoms in the air and water. Forams thus play a significant role in the carbon cycle. (Magnification 75x) [From Discover Magazine]
Here, the pink and red grains are garnet, but garnet can also be brown, black, green, or orange, depending on the chemistry. The bright green epidote in the center can also be gray, brown, or nearly black. The angular, black magnetite--the most common naturally occurring magnetic material on earth--is always black, however, and is frequently found near garnet. (Magnification 95x) [From Discover Magazine]
The raised bumps on the white grain represent the sites of insertion for the sea urchin's spines. The blue grain has eroded to the point that the raised bumps have been completely rubbed off. (Magnification 100x) [From Discover Magazine]
Wednesday, September 7, 2011
The trees were planted around 1930, and it is believed that they grew for 7-10 years before tree farmers used a mechanical device to hold the trees in the bent formation.
You can see more at the Discovery News site here.
Wednesday, June 1, 2011
It is important to understand how each technology works and to know the main energy transformations involved. You must also be able to differentiate between active and passive solar energy.
Coal-fired power plant:
Nuclear power plant:
Tidal power generating facility:
Passive solar heating:
Geothermal electricity generating facility:
Hydrogen fuel cell (automobile):
Monday, May 9, 2011
Test your own senses and take the BBC's sense challenge: http://www.bbc.co.uk/science/
Some sites that have specific illusions:
Spanish Castle Illusion: http://www.johnsadowski.com/
Watercolour Illusion: http://www.scholarpedia.org/
Many artists use a knowledge of perception to create art, but another famous and very clear example of this is M.C. Escher.
Thursday, May 5, 2011
Explore this website to see animations for all of these processes and mechanisms in the neuron: http://icarus.med.utoronto.ca/neurons/index.swf
A virtual neuron - see how it behaves here: lhttp://www.childrenshospital.org/research/Site2029/mainpageS2029P23sublevel51.html
See how resting membrane potential is maintained here: http://www.sumanasinc.com/webcontent/animations/content/electricalsignaling.html
An animation of an action potential here: http://outreach.mcb.harvard.edu/animations/actionpotential.swf
Another animation for nerve impulse/action potential here: http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter14/animation__the_nerve_impulse.html
This one shows the changes in the ion channels during an action potential. Make sure you know where sodium and potassium move during depolarization and repolarization. You can check it out here: http://www.blackwellpublishing.com/matthews/channel.html
More animations from the same organization that did the last animation. Check out "Propagation of an action potential" and "Synaptic vesicle fusion and neurotransmitter release" here: http://www.blackwellpublishing.com/matthews/animate.html
Thursday, April 21, 2011
Saturday, April 16, 2011
This photograph by Sandra Critelli is of Golden Rays taken off the Mexican Coast. Golden Rays grow up to seven feet across and migrate within the Caribbean. The spectacular scene was captured as the magnificent creatures made one of their biannual mass migrations to more agreeable waters. Despite having poisonous stingers they are known to be shy and non-threatening when in large schools. These schools can be as large as 10,000 stingrays. You can read more here and see more pictures here.
Blogger Alex "Sandy" Antunes wrote an article on Science 2.0 that explores which science causes the most deaths.
According to movies, physics would be the clear winner: car crashes, gunshot wounds, bicycle accidents, falling down, people hitting each other, and war are all physics-driven deaths.
Chemistry related deaths would be toxins, poisons, drugs, alcohol, or drowning.
But... biology is the deadliest. Since heart disease, cancer, and stroke kill the most people in North America, as well as disease and infection throughout the world's population.
You can read the full article here: http://www.science20.com/daytime_astronomer/which_science_kills_more_people-77520
Six years ago, he spotted a small opening on the edge of Mendenhall Glacier in Juneau, Alaska. He hiked to it with the intent of walking around as he'd seen others do before. But something compelled him to look inside."
Now he has spent the last six years searching for glaciers, exploring them, and photographing the formations.
You can read more about Eric Guth and see more of his photographs at http://www.mymodernmet.com/profiles/blogs/inside-glacier-caves-17-photos
But according to the UK government, which assisted in the flood release effort this may have actually had a positive health effect: On-the-ground reports suggest that there are fewer mosquitos than would have been expected after the influx of so much stagnant water. This, in turn, may have reduced the very real risk of malaria to local populations afflicted with flooding. The web-coated trees, however, remain scary-looking."
This information and the pictures were taken from http://www.geekosystem.com/spiderweb-trees-pakistan/
"Maria and Igor Solovyov (Solovyov Design) are industrial designers based in Minsk, Belarus. One of their recent projects is “Insight”, the ingenious concept for an energy efficient lamp shaped like the human brain."
You can see more pictures at http://viacomit.net/2011/04/04/insight-by-solovyov-design/
Sunday, March 6, 2011
Research on domesticating wild animals has gotten some press lately. Not only does this research provide a possibility for neat pets... but we are learning more about genetics and selective breeding.
Foxes have actually been used in this research for many years. One study has been continuing for 45 years! Each generation has been selectively bred for tameness—fearlessness and nonaggression toward humans. By now the foxes in the project behave like pet dogs, barking and wagging their tails at humans. Also, instead of having a red coat colour, these domesticated foxes have a "piebald" colour.
National Geographic has a great article this month on taming wild animals. You can read more and see more pictures on the website: http://ngm.nationalgeographic.com/2011/03/taming-wild-animals/ratliff-text
Would you like a pet fox?
The field of culinary evolution faces one great dilemma: why do most cooked, exotic meats taste like cooked Gallus gallus, the domestic chicken?
It is curious that so many animals have a similar taste. Did each species evolve this trait independently or did they all inherit it from a common ancestor? That is the burning question.
Using a diagram that shows how some kinds of organisms evolved from other kinds of organisms. This is a "tree" of evolutionary ancestry. Then the author and researcher created a tree using flavours of their meat to see if animals that taste similarly have similarly tasting ancestors.
You can read more about the process through this link: http://www.neatorama.com/2011/02/22/tastes-like-chicken-2/
Comic from Toothpaste for Dinner 2006
It’s a simple process. Just drain the contents of a magic marker into a jar of water. Cut the stems off of some flowers and stick them in the jar. Let the flowers sit in the solution overnight. In the morning, after they have absorbed the fluorescent dye, they’ll glow in the dark when exposed to ultraviolet light.
You can make... GLOW STICKS:
Tuesday, February 15, 2011
DNA Transcripion/Translation Video:
DNA Replication Animation:
(Please go through the entire animation)
This website has shorter animations of Replication, Transcription, and Translation with quizzes as you work through the steps. To get to the other processes, use the left toolbar.
Thursday, February 10, 2011
BUT... the most interesting thing about these bacteria is that they are bioluminescent, or "glow" when there is any movement. This means that this bacteria will light up when there is a wave or ripple in the water, and wherever people played in the water. Read more about bioluminescence here.
Here are some spectacular pictures of these lakes. You can also see more here.
This is a picture of a rock skipping across the water.
The structure represents a bridge with large wind turbines mounted under it, between the pillars. The bridge will traverse a valley with large open space and the wind turbines will operate at high altitude where the speed of wind is higher, thus more green energy will be collected.
In addition, the "Solar Wind" will be able to harness solar energy, since its entire road will be covered with a dense network of solar cells. The latter will be coated with a see-through and highly resistant type of plastic.
It was said that the bridge will be able to generate 40 million kWh per year! (This would power half of the United States -- the largest energy consumer -- for the entire year.)
Her attention to detail is very impressive!