Awareness Article #1 is due Feb 14th, 2008.
Please see Awareness Article format found in the labels on the right hand side of the front page.
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Sunday, February 8, 2009
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February 17, 2009
The Ageing Process
http://www.firstscience.com/home/articles/humans/the-science-of-skin-care_56829.html
2 Dec 2008
By Laura Starr
This article explains how overtime the collagen and elastic fibres, known as the dermis layer diminishes, resulting in lose of elasticity in the skin. This then makes the skin wrinkle and droop. Factors that cause premature aging are exposure to the sun, as in ultraviolet rays, and smoking, speeds the process of skin ageing by the contact of tobacco smoke.
Laila Mirza
SOUND
Mcgrath, Jennifer
06 February 2009
http://galenet.galegroup.com/servlet/SciRC?locID=winn39111&bi=SU&bt=%2522Sound%2522&c=1&t=1&ste=21&docNum=CV2434500478&st=b&tc=63&tf=32
Sound is made when an object vibrates and transports kinetic energy to the molecules of the object surrounding it. Kinetic energy uses vibrations from an objects molecule to move kinetic energy to new molecules. When we talk, air moves from our lungs past our vocal cords, causing vibrations. Vocal cords contain two flaps of tissue that can move together or away from each other. When the two flaps are together, they compress in the air between them. When they move farther apart, they cause a decrease in density. Sound waves are a source of entertainment to people for example they let us hear our favorite music or the soothing sounds of nature!
Katina S
Friday,feb.6/09
Jordan madick
Awareness article summery
Dealing with a difficult dog
i-love-dogs.com
a dog is going to brighten his master’s life. This is what most people expect when they bring their dog home.
You never knew he could be so naughty- ripping up the furniture and barking.
Some people can’t handle this behaviour, so they take their dog to the animal shelter. Other people are going to try to work with their dog and sort things out. If you want your dog to be successful:
Follow these 4 steps.
1. Get information at the library,pet store, news papers,etc..
about training your dog
2.Get a vet to check if your dog is healthy.
3. It can take time for your dog to correct his bad behaviour. If you loose your temper,
you will end up back in square one.
4. Get help from a dog trainer.
Title: Increased Risk Of Injury Even After First Alcoholic Drink
Author: Karalinska Institut
Date: March 25, 2009
Source: http://www.sciencedaily.com/releases/2009/03/090323093015.htm
This article explains the physical injury related to the consumption of alcohol causes substantial costs to society. But while the link between severe intoxication, road accidents and violence is well known, the consequences of ‘normal’ drinking are much less researched. Some results have shown that one in four of the injuries dealt with by the A&E unit had occurred after the consumption of alcohol, but also that this ratio varied widely at different times. Over 80 per cent of the injuries that had occurred on a Friday and Saturday night were alcohol-related. This thesis also shows that the risk of suffering injury, for whatever reason, increased even after the consumption of small amounts of alcohol. However, and hardly surprisingly, people who had drunk large quantities of alcohol suffered higher injury risk than people who had drunk only a little. However, the thesis also shows that most of the injuries that were judged to be due to alcohol occurred after only moderate consumption.
Kayla M
Water Purification
Robyn V. Young
This article is about water purification and how to make sure the water is safe enough for consumption. There are many unsafe things that are found in water and many different processes used to make this water safer, such as distillation and desalination, which are ways to get the salt out. Water must then be purified through several stages starting with filtration to remove large particles and goes through other steps to get rid of the smaller particles in order to make it completely safe for everyone to drink.
http://galenet.galegroup.com/servlet/SciRC?locID=winn39111&bi=SU&bt=Water&c=6&t=1&ste=21&docNum=CV2432500743&st=b&tc=63&tf=0
http://galenet.galegroup.com/servlet/SciRC?locID=winn39111&bi=SU&bt=drinking+water&c=14&t=1&ste=21&docNum=CV2644151472&st=b&tc=31&tf=0
Michelle
Why does metal spark in a microwave?
Microwaves are like sunlight passing through a window. They pass through materials such as; glass, plastic, and paper. But metal does not allow microwaves to pass through, they reflects them. The metal walls of the microwave act like a resonator, containing all the waves inside the space. This it called frequency resonance. This is similar to a wine glass that vibrates when you play the right piano key. They have the same frequency. Microwaves are electromagnetic wave. The active waves cause a current to run through metals and other conductors. A build up of current causes the metals to heat up. This is the purpose of the thin metal in the container for microwaveable lunches, to transfer heat. This is the same principle that makes metals to spark or even catch on fire in a microwave. The current can build up to an extreme point where it can light up. The electrical potential can be so vast that the air around it can conduct electricity which causes an arc between the two conductors.
Katelyn R.
http://www.thewireup.com/2008/10/why-your-fork-sparks-in-microwave.html
http://amos.indiana.edu/library/scripts/metalmicro.html
Making the world a billion times better
The first paragraph of the article is about how fast computer technology has changed in the last 50 years. This kind of increase in capability is growing in exponential rate, like solving a myriad of conundrums. During a disastrous time, like the Great Depression or the World Wars, the population and the technology have been growing steady. The solar energy cannot be used now, but soon developing the nano tech will make it possible. The author’s opinion is very positive in the article in that he thinks the world will become much better because of technology in a mind-blastingly fast speed. He also writes that the genome project has finished earlier than the prediction is an another example of an exponential growth. Even the biological technologies are showing the same progression. Scientist had succeed in turning off and on the insulin receptors in the mouse already. The point that writer is saying is that like a computers exponential growth, scientific technologies will grow more and faster each year. This will results the world a much better place in future.
http://www.washingtonpost.com/wp-dyn/content/article/2008/04/11/AR2008041103326.html
Global Warming
Publisher: Timothy Ball
Global Warming is human-made phenomenon that leads to increasing the sea level and addition of ozone layer by burning coils and producing massive carbon dioxide. The Green house gases, so-called GHG contributes to increased temperature and add ozone layer hence the layer absorbs sunlight in atmosphere. We have to stop cutting down the forests, and burning coal and oil. If the trend in global warming continues, next century the earth may be the hottest it has been in for some hundred thousand years.
Links:
http://galenet.galegroup.com/servlet/SciRC?locID=winn39111&bi=SU&bt=%2522Global+warming%2522&c=2&t=1&ste=21&docNum=CV2640300008&st=b&tc=63&tf=0
http://www.canadafreepress.com/2007/global-warming020507.htm
Title: Why animal research is bad science.
Author: Tatchell, Peter
Date of Article: 8/9/2004
Source: http://web.ebscohost.com/ehost/detail?vid=7&hid=105&sid=81cb8ab7-f608-4e3b-9519-5aca59a275c9%40sessionmgr109&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=rch&AN=14027536
Most diseases are specific to humans, species react differently. Strychnineis is toxic to humans but not monkeys. There are many cases where animal testing was used and people died or became seriously ill. The opposite effect can take place also, where something fails in animal testing, it’s decided it won’t work, but it could be a life saving cure, so animal testing is misleading.
Non-animal methods like cell backs, toxins in drugs, and simulations of the human body offer better data, without killing animals. Cures should be found by research of humans, not other animals, they have feelings too.
http://www.elements.nb.ca/theme/toxics/emily/emily.htm
http://www.animalalliance.ca/kids/anitest1.htm
This article explains sounds traveling. Did you know that sound cannot exist if it doesn't have something to travel through. Sound in water and sound in air are both waves that move similarly and can be characterized the same way. Sound travels a lot faster through water than air. Water travels 4 times faster through water than air. Think about how well whales can talk to each other over miles and miles apart. Even warm air is better than cold air for sound waves to travel through. When we describe a sound as loud or soft, scientists say that the sound has a high or low amplitude or intensity. Amplitude refers to the change in pressure as the sound wave passes by. If you increase the amplitude of a sound, you are making it louder, just as you do when you turn up the volume on your stereo. If you decrease the amplitude, you are making the sound softer, just as when you turn down the volume.
Links: http://www.dosits.org/science/ssea/3.htm
http://www.ldeo.columbia.edu/~vschmidt/mbcookbook/x145.htm
You Know More than You Think
By Jack Soll and Richard Larrick
June 2, 2009
This article explains the idea that two heads are better then one. When a small group of people answer a question such as estimating the room temperature (the example they use in this article) there is a much higher chance that they will get the answer right when they combine their answers and find the group average then if they just asked one person to share the answer. Although this article says that a couple people working together is smarter then one individually, it also explains how there is a difference in working in a group compared to a crowed. When a large group of people get together with all different opinions and ideas to share things can get complicated and confusing. So when doing a project make the groups of 2 or 3 and people with similar ideas.
http://www.scientificamerican.com/article.cfm?id=you-know-more-than-you-think
http://mansci.journal.informs.org/cgi/content/abstract/52/1/111
Tsunamis
Strieb, Max. Environmental Encyclopedia. Ed. Marci Bortman and Peter Brimblecombe. 3rd ed. Detroit: Gale, 2003.
http://galenet.galegroup.com/servlet/SciRC?locID=winn39111&bi SU&bt=%22522Tsunamis%2522&c=2&t=1&ste=21&docNum=CV2644151418&st=b&tc=63&tf=0
Tsunamis are big seismic sea waves that cause a lot of damage to areas along coastlines. They are caused by underwater seismic activity, such as an earthquake. Some people think that they are the same as tidal waves, but they are totally different. Tides are the up and down movement of the sea at shore due to the gravitational pull of the moon. The movement of the Earth’s crustal plates causes tsunamis. Tidal waves don’t cause nearly as much damage as Tsunamis. Tsunamis are so long that it could take up 60 minutes for one wave to pass a fixed point. They usually travel at a speed of 450 mi/h. Since scientists have gathered information from past tsunamis, they have been able to develop an early warning system. Having this can help people get ready.
http://www.geophys.washington.edu/tsunami/general/physics/physics.html
http://ffden-2.phys.uaf.edu/212_spring2005.2.phys.uaf.edu/212_spring2005.web .dir/Justin_Priest/Tsunami%20Home.htm
Jarrell
http://www.sciencedaily.com/releases/2009/06/090602192559.htm
June 3 2009
Secret Of Sandcastle Construction Could Help Revive Ancient Building Technique, Researchers Say
This article is talking about how people may be able to figure out how ancient civilizations were able to build some of the structures that they did by studying how sandcastle builders do what they do. Apparently, the amount of water in the soil is important to how stable the structure is. Engineers said that even though the soil dried up, there was still enough moisture left in it for it to be a sound structure. They called the material that was used to build stuff rammed earth, made up of sand, gravel, and clay.
Time Travel
Scientists have a theory that time travel is not impossible. On earth we move forward in time while in space they move forward and backward in time. Since time and space are linked there is a possibility of travelling through time backwards or further forwards.
http://www.crystalinks.com/timetravel.html
http://www.youtube.com/watch?v=DnLIxEso4rg
Titles
- Earth’s Water Cycle
- The Water Cycle
Authors
- Lisa Gardiner
- ETE Team
Date of Articles
- January 6, 2009
- April 28, 2005
Sources
- http://www.cotf.edu/ete/modules/msese/earthsysflr/water.html
- http://www.windows.ucar.edu/tour/link=/earth/Water/water_cycle.html&edu=high
Additional Source
- http://www.biology.ualberta.ca/facilities/multimedia/uploads/alberta/watercycle.html
Summary
The Water Cycle, it keeps us all alive, and yet is only one part of our remarkable planet on which we live. Water travels through the air by evaporation and gradually condenses into clouds. The clouds then eventually become too heavy, and so the water falls to the ground as precipitation. The water now on the ground joins rivers, streams and other water bodies and then eventually begins to evaporate once more.
http://www.doctorsexercise.com/journal/aging.htm
http://www.healthandage.com/html/res/primer/primer2.htm
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