Vanessa Phalen

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Recent Reviews by Vanessa


Tue Mar 16, 2010 1:19 PM
5 Newton's Third Law
For every action there is and equal and opposite re-action. This article was a nice break down of this concept and provided excellent animations for my students to see on my projector. With my students outside, I put vinegar in a film canister, covered it with the lid that has an Alka-Seltzer glued to it. The canister flies off in one direction and the lid takes off in the opposite direction. This helps the students see first-hand Newton’s Third Law of Motion.


Tue Mar 16, 2010 12:03 PM
4 Newton's Second Law of Motion- take 2
I tied this article into the activities we learned this summer at our PISA workshop. We were given two balls that appeared to be exactly the same- size and mass. When we dropped them at the same height, they reacted differently. The ball with the greater mass did not bounce back up whereas the ball with less mass bounced. In my lab class I have the student’s first try to move an eraser by blowing on it. Given that the eraser has a greater mass than the student's breathe, the eraser does not move. Next I trade the erasers for cotton balls and tell the students to blow once again. This time the cotton balls move due to the amount of force exerted from their breath.


Tue Mar 16, 2010 11:24 AM
5 Newton's Second Law of Motion
I tied this article into the activities we learned this summer at our PISA workshop. When two people of the same mass push against each other, neither move. When a larger person pushes against a smaller person the smaller person moves. In my lab class I have the students first try to move an eraser by blowing on it. Given that the eraser has a greater mass than the student's breath, the eraser does not move. Next I trade the erasers for cotton balls and tell the students to blow once again. This time the cotton balls move due to the amount of force exerted from their breath.