Wednesday, March 13, 2013

Current Event 1 Quarter 3


Petra 7A
Science
Mrs. M.
http://www.cbc.ca/video/news/audioplayer.html?clipid=2329176123
http://www.cbc.ca/quirks/episode/2013/01/26/january-26-2013/#3
3/14/2013

In Newfoundland, Canada, something odd was found. A coyote roaming the countryside was reported to have a completely white pelt! On top of that, it was found that the coyote was not albino. It was found that this coyote had a gene mutation that is also found in golden retrievers and other red or gold dogs. The mutation shuts off the production of one pigment, namely the dark colour, and that makes the production of another pigment, namely gold or red. That is the case with golden retrievers. With these white coyotes, it seems that the other pigments did not get produced, so what was left was a white coyote. It turns out that this new ‘species’ appeared some time after a coyote and a golden retriever disappeared together during mating season. Scientists believe this is the reason of the white coyote.

Tuesday, February 5, 2013

Lab Report - Weights and Waves

Guiding Question
Does the size and weight of an object determine the size of the waves it makes?

Hypothesis
I think that the size/weight of an object does affect the amplitude of the waves produced.

Variables

  • Controlled: Water, pan
  • Manipulated: Size and weight of objects dropped in
  • Response: Amplitude of waves. 
Materials
Water
Pan 
1 pound weight
2 pound weight
cork
small metal ball

Procedure
  1. Fill pan with water.
  2. First, drop the 1 pound weight in. Record the height of the waves (roughly) in the data table. repeat the process two times. Remove the weight.
  3. Next, drop the 2 pound weight in, and so on. Record all of your observations in the data table. 
DATA TABLE


Item
Trial #1
Trial #2
Trial #3
1 pound



2 pound



Cork



Metal ball




Sunday, January 13, 2013

Wave Lab Report

Data Analysis

When a wave hit another wave, they bumped into each other, yet kept going on their own ways, like nothing had happened. When a wave hit a barrier, the wave would crash into it and would not keep going, because there was something blocking its way, so it would just dispel. If there was a split in that barrier, though, the part of the wave that was heading toward that split would keep going, and the rest of the wave would hit the barrier that was obstructing their path. When a wave hit the other side of the pan, it would just bounce back.

Simulation

In the simulation, I found many things, but quite a few of them were already covered by the lab. One thing that was shown was that the more drops that were dropped, the more waves were created. Also, the bigger the drop, the bigger the waves it creates. The simulation is a great was to find out things about waves.

CONCLUSION

1. When water is dropped from a pipette into a pan of water, how do the waves behave? The waves roll outward, away from the point of impact.
3. How do waves interact with each other and with solid objects in their path? When waves hit each other, they bump into each other, yet then move on and keep moving in their path. When they hit solid objects in their path, they crash into the objects, and that stops their movement.
My hypothesis was somewhat correct, but only somewhat. I wrote that when waves meet, they crash into each other, but not that they move on with nothing changed. I also wrote that when they hit solid objects in their path, they crash into them and find their way around, but that was proven not necessarily true in the lab. The waves crash into the objects and their path is interrupted, so they do not roll anymore. When the waves hit the side of the pan, however, they bounce back.

Further Inquiry

I think there were some things that went wrong, perhaps the time when the waves went under the cork rather that carrying it along with them. I think that's what should have happened. Also, what was interesting was that some water was stuck in the cork after the previous experiment, so that when we put the cork in the pan, the water leaked out of the cork, and, as a result of being in the cork for so long, the water that leaked was yellow. I would really like to find out why, when the waves hit the clay, they did not just bounce back like they did when they hit the side of the pan.

Tuesday, April 24, 2012

H1N1 Essay


H1H1-The Swine Flu
Petra 6A
               In 2009, something dark swept across the world; something dangerous, something… invisible; something new. Many medications and vaccines were prepared, and many were still saved even though many weren’t, falling to this mystery. It flew through coughs and broke through defenses. Descending upon Earth, the H1N1 virus caused deaths and sadness, but also awareness and medicine.
              The H1N1, also called the swine flu, was a new influenza first found infecting people in the U.S., in 2009, and quickly spread, through coughing, sneezing, or talking with someone who was infected with the influenza, and even sometimes by touching something with the flu viruses on it and then touching one’s nose or mouth. It was called the swine flu because it was found similar to a flu virus that had infected pigs, but scientists soon found that it was quite different and infecting people fast. When a person started coughing violently, having fevers, runny or stuffy noses, body aches, chills, and fatigue, they most often had the influenza, or the H1N1. Really bad cases included vomiting and diarrhea, and, sadly, many of the H1N1 cases resulted in death. Many people with other illnesses, such as asthma or heart failure, often became worse if the person with those illnesses was infected by the flu. People often fell to this illness. Death and sickness cascaded on the land when the H1N1 took place.
             Even though the 2009 H1N1 virus was dangerous and life-taking, vaccines were soon developed and were spread across the world.   It was made so that everyone six months and older was recommended to get the vaccine. Everyone had to get the vaccine each season, but certain people were urged to, because they were more at risk, such as pregnant women, children younger than five, but especially children younger than two years old, people 50 years of age and older, people of any age with certain chronic medical conditions, and people who live with or care for those at high risk for complications from flu, including: Health care workers, caregivers for people at high risk for the flu, caregivers of children less than 6 months of age (those under 6 months were too young to get the vaccines). Now, people might ask; “Why do I have to get another vaccine each season? I got one not too long ago”. The answer to that is that the immunity could decline after a while, and it is safer to get another to keep it up. So go and get your vaccines, if H1N1 is coming your way!
           Do you want to know how bad it was? Around 43,771 people in the U.S. were reported infected between April and June 2009 only, and, out of those cases, 5,011 were hospitalized and 302 people died. Though, these reports couldn’t have been too accurate, because some people weren’t very badly affected with the flu, only mildly, and so never sought medical attention. Others got medical attention, but were never tested or diagnosed, and so that means that the count was only a small bit of the true H1N1 attack. It’s estimated that, instead of 43, 771 people, over one million people got infected with the swine flu. That is a lot of people, and a huge loss.
             The H1N1 flu spread across the world, but luckily vaccines came to the rescue and kept many from getting it. This new influenza took many lives, leaving that many families sad. It was terrible, but we were able to help others, keeping others from death. Hopefully, next time the swine flu strikes in full force, we will be ready.
           

Friday, March 23, 2012

Are Viruses Alive? Or not.....?

I believe that viruses, are not alive, and yet they are. They are in between our definitions of living and non-living. They have many characteristics of life, and yet they lack some that would make them technically "alive". For instance; they reproduce (though only through using a cell to replicate itself), they respond to their surroundings, and they grow, but they do not use energy or have their own cells. They are simple beings that use host cells to run their primary functions, and so technically can not "live" on their own. So therefore, they could be alive, but do not have all the necessities of life, and so are kind of in the middle. It is certainly very puzzling...

Resources:
http://serc.carleton.edu/microbelife/yellowstone/viruslive.html 
http://answers.yahoo.com/question/index;_ylt=AjyfHkZ.7arQCjpdnEvtQRAjzKIX;_ylv=3?qid=20080818175050AAVzWEg 

Clostridium perfigens -- Gas Gangrene (Wanted Poster)

 

Sunday, March 11, 2012

Cur. Ev. 3rd Quarter No 1


Current Event
Petra 6A
Science
Mrs. M.
3/8/12
Good Bacteria, Bad Bacteria
             There are so many harmful bacteria, but there are also very helpful bacteria. When bad bacteria are attacking the body and causing sickness, there is the immune system which fights the sickness, but how on earth does the immune system know good from bad? Scientists from the Northwestern University Feinberg School of Medicine have found a special white cell called macrophage, which is one of the first to find the harmful cells and kill them. They found that a protein called “NLRP7” finds out if a bacterium is good or bad. It kind of acts as a little “scout” that searches the different aspects of the bacterium and decides whether it’s good or not. Finally understanding how the body fights these little creatures could lead us to, in the future, maybe solving the problems of brain disease.
My Thoughts
            I think that it is amazing that this has been discovered. I found it really interesting to read, it was a topic that I found myself pulled into, probably because I like to understand things that go on in the world I live in. The fact that we might, one day, be able to cure brain disease excites me, but it also troubles me. Diseases of all sorts are on this Earth for a reason. If we suddenly cured all sicknesses and diseases in the world, not so many people would die! Yeah, I know, you’re probably all thinking: ‘But isn’t that a good thing?’ Well, let me ask you, how many people do we have in the world today? That’s right, 7 billion+. And how many more people would be added to that figure if there were tons of fewer deaths? That’s just something to think about when you’re reading things like this… J