Rohrbaugh,+Taylor

Can Cell Phones Damage Your Brain? (Article)
 * 8/31**

The article I read was interesting, yet disturbing. It's weird to think that the items that we use everyday could possible harm us later on in life. I knew that cells phones give off radiation, but I didn't know what exactly what radiation was. I learned that radiation causes the surface of the skin to heat up a fraction of a degrees, while killing brain cells. I also previously knew that scientists had been studying how our bodies actually react to radiation. I think it was crazy to read that two-thirds of children and older have cell phones and use them constantly everyday. I figured that constant interaction with radiation increased your risk of brain cancer. But, I thought it was interesting, but also true, that each cell phone gives off different amount of radiation.

Taylor, I think the "jury is still out" on whether cell phones cause cancer or not. BTW I'm pretty sure heating up your head by a fraction of a degree won't kill brain cells 5 stars. MW


 * 9/19**

Something I found interesting was that the hotter substances travel to the bottom of the container and the cooler things are at the top. This would be relevant to this class because of density and ways of separating things from one another in a mixture. I found this video very interesting with the way they separate the different substances from one another in the oil. I am looking forward to learning more about this process later on in class and the semester.

Taylor, Pretty basic but I did like the way you brought density in to your post. 5 stars. MW

Motion Detectors
 * 10/4**

Things I learned:
 * I learned that glass can block the detection of an object from seeing the detectors
 * I also learned that Einstein won the Nobel Prize in 1921 because of his work done on the Photoelectric Effect
 * Finally, I learned Heinrich Hertz was the first to discover the Photoelectric Effect.

Things I knew: Taylor, Looks good! 5 stars. MW
 * I knew that there were many different types of motion detectors and that they all had distinct functions.
 * I also knew that the detectors picked up light and movement along with a person body heat.
 * And finally, I knew that stores use motion detectors to open doors and they help turn on lights when they detect the presence of body heat.