Position and Velocity Related to Time

This was our first task, to create a straight line in the position/time graph. To achieve this we stood still and let the motion detector run until the end:

Screen Shot 2015-02-06 at 2.51.59 PM
Next we had to make the line go up, and for that I slowly went away from the detector:

Screen Shot 2015-02-06 at 2.53.06 PM
 

The last simple one we were “challenged” with was to make a downward line on the graph. To do this I started far away and walked toward the monitor:

Screen Shot 2015-02-06 at 2.59.28 PM

 

For the first difficult task we were to make a zigzag line on the monitor, this was difficult as it would require some more movement. What we did was we held the monitor facing away from the wall and passed our hands quickly back and forth through the monitor’s field of data collection:

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Then we got to the point where we had to download graphs which had built in line/trend to imitate. For this line I slowly backed off, stopped, slowly came forward, and finally stopped:

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The next trend was more difficult to achieve as there were closer and more precise movements to make. I made sure to start off far away and not to rush while closing in, I stopped and when there was the sharp fall I quickly stepped forward and stopped just after. Then there was a slow ascent so I slowly backed off.

Screen Shot 2015-02-09 at 2.59.53 PM

 

These last two were the velocity vs. time graphs and so they were much more difficult to replicate because of the space we were using and finding out the exact speeds. For the first graph there were two quick jumps, one moving away and one moving towards. When I walked backwards I tried my best to keep the same constant velocity throughout.

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In this final graph I had to walk away with increasing speed and finally walk towards the detector at a constant speed.

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Preparing for Life on Mars

 

This article writes about how there is a small team of 6 members who are undergoing an experiment on how travelling to, and living on mars would be. This is so NASA understands how people would react to living in a small group isolated from the rest of the world, for such a long time.

The way they are using science here, is that they are recreating the exact living qualities of how it would be on a spaceship, and on mars. They take precautions like the aesthetics, communication time lag and their daily routines. Their daily routines include exercise, meals + hygiene, and running experiments on growing food and making compost inside the dome, and excursions.

The science in this experiment will gravely affect on who will be chosen for the mission, and how to minimise their social disputes; and, in turn help the mission to mars flow much more smoothly. It may also help NASA economically as they may not need to use as much funds tweaking things for the comfort of the members of the mission.

Source:
Jonathan. “Volunteers Preparing For Life On Mars.” Teaching Kids News. Teachingkidsnews.com, 28 Oct. 2014. Web. 08 Dec. 2014. <http://teachingkidsnews.com/2014/10/28/3-volunteers-preparing-life-mars/>.

 

Science – Metals in the News

This article is about how banana peels can help clear heavy metals from polluted water. The way science is being used in this article, is they found out that in the banana peel there are compounds like carboxylic acids, and these acids bind to many metals that they come into contact with. Bonding is when two substances are chemically bonded. When carboxylic acids bond with reactive metals, they create harmless salts and hydrogen.

Economically, this discovery can save lots of money because current water purifiers are expensive, and need to be replaced persistently. But banana peels only have to be replaced after eleven uses instead of a one time use, then replace filter.
The only main fault of the banana peels is that they don’t kill bacteria, so after the main metal filtration there has to be a bacterial filtration method discovered or invented.

Article: Dolasia, Meera. “Banana Peels – The New Water Purifier?” DOGOnews. Dogo, 27 Nov. 2011. Web. 22 Sept. 2014. <http://www.dogonews.com/2011/11/27/banana-peels-the-new-water-purifier>.

Science – Reflection Criteria D

One improvement I could make to my transition metal research, is that I could have included a bibliography for the photo I took. I completely forgot to add the bibliography for it. But I did cite my sources well, and I made sure I added the author’s name and such.
Another improvement I could make, is I could explain the implications of extracting the metal and such.
Plus, I didn’t really use my scientific vocab well.