by Sami:
Items that are attracted to a magnet must be made out of metal but not all kinds. Some examples of items that are attracted to magnets are bottle caps, paper clips, and metal lids. Magnets are not attracted to plastic, wood, wax, and aluminum.
Friday, February 28, 2014
How do you change the motion of a pendulum? (Scenes from Science)
by Ava:
First we watched to see how long our pendulum would swing back and forth in one minute. It slowed down very quickly but it swung 23 times in a minute.
Second we tried starting the pendulum farther from the middle and we observed that it swung about the same amount.
Then we tried making the pendulum heavier by adding a weight into it. We observed that it still swung the same number of times, but it swung longer.
Afterwards we shortened the string and realized that it swung 31 times in a minute. Finally we put weights in the short pendulum and it swung the same time. We concluded the shorter the string the faster it swings.
First we watched to see how long our pendulum would swing back and forth in one minute. It slowed down very quickly but it swung 23 times in a minute.
Second we tried starting the pendulum farther from the middle and we observed that it swung about the same amount.
Then we tried making the pendulum heavier by adding a weight into it. We observed that it still swung the same number of times, but it swung longer.
Afterwards we shortened the string and realized that it swung 31 times in a minute. Finally we put weights in the short pendulum and it swung the same time. We concluded the shorter the string the faster it swings.
Who was Leonardo da Vinci?
Meet Bob (Scenes from Science)
Meet Bob!
Bob hangs from a string in our classroom. Bob is actually the scientific term for the object at the end of a pendulum. We've been experimenting with our pendulum, trying to figure out how to change the speed at which Bob swings. Stay tuned for some news from our science reporters.
Tuesday, February 25, 2014
Scenes from Science
by third grade reporter Madyson:
We wanted to find out if two objects with different wights would drop at the same time. First we tried dropping a tennis ball and a cube and they both dropped at the same time. After that we tried one cube vs. 9 cubes stuck together and they both dropped at the same time too. Next we tried a big block and a small cube and they both dropped at the same time too. I found out that all of them fell at the same time.
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