Water Cohesion Lab Variables (p2) by Lyudmila Shemyakina https://padlet.com/lyudmila_shemyakina/g2ir14862o8p Let's share ideas about controlled variables! en-us 2016-08-29 05:09:12 UTC 2016-08-29 17:09:32 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Growing.png Directions lyudmila_shemyakina https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120231318 Describe at least ONE variable you didn't control in Friday's lab and how you COULD control it! Use complete sentences.  ]]> 2016-08-29 05:11:29 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120231318 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361478 One variable we didn't control was the angle and height. We should have collaborated on the angle and height we wanted to drop the water on the coin. ]]> 2016-08-29 16:38:28 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361478 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361493 One variable that my partner and i  couldn't control was the amount of water the pipette would let out . A way that you could control it would be how hard you squeeze the pipette 

]]> 2016-08-29 16:38:30 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361493 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361588 One variable my partner and I did not control is the height that we dropped the water at. One way we could have controlled it is we could have used a ruler to measure the desirable height. Every time we drop the water, we need to drop it at that height. to make it equal.]]> 2016-08-29 16:38:43 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361588 One variable that was uncontrollable was the drops being the exact same size. If I was able to control this variable I would need one of those expensive pipets to get the exact amount. https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361701 2016-08-29 16:39:01 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361701 Water Cohesion Lab Variables (p2) 100020285 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361832 Something that we couldn't control was if the paper towel which we placed the penny on was 100% flat. Had there been a slight tilt, there would have been a greater chance of having it spill. We could use a different, more flat and less malleable material to place the penny on such as a sponge. 

]]> 2016-08-29 16:39:16 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361832 what i did not control https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361890 i did not control my partners stability. i coulve tried telling my partner to put their elbow on the table to have a bit more stability.]]> 2016-08-29 16:39:24 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361890 ojrollet https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361912 One variable that we wanted to control but couldn't was the drop height like most people. We were dropping the droplets at different heights which gave us different results.

]]> 2016-08-29 16:39:28 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361912 One variable I could't control was the hight and the pressure of the water drops. With different drops it would either splash and make the water fall off the coin or if it was soft enough it would just connect with the former water. If I was to be able to control it I would most likely use a ruler and use an exact height the same time. For the pressure part I would most likely just try to assume what is right and what is wrong.  100020090 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361918 2016-08-29 16:39:28 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361918 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361921 One thing we didn't control in Fridays lab was the amount of drops that we could fit onto the penny. One way we could have controlled it is by the size of the coin.]]> 2016-08-29 16:39:29 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361921 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361955 One variable we didn´t control is the height of the drop. We could have controlled it using the ruler from a certain height]]> 2016-08-29 16:39:32 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361955 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361957 We were not able to control the amount of drops that could fit onto the penny.  I was also not able to control how many drops my partner could fit onto the penny.


]]> 2016-08-29 16:39:33 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120361957 Distance of the Pipette from the Penny https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362034 One variable I didn't control in Friday's lab was the distance of the pipette from the penny. We could have controlled this variable by measuring the distance of the pipette from the penny with a ruler. ]]> 2016-08-29 16:39:43 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362034 The cleanliness of the penny - there may have been grime or something that de/increased the cohesion of the water on one of the pennies.  A way we could have controlled this variable would be to clean all the pennies with tomato sauce/lemon/ vinegar or however you are supposed to clean pennies 100020480 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362125 2016-08-29 16:39:56 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362125 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362218 One variable that was uncontrolled was the size of the drop. We could have controlled it by holding the pipet the same way and placing water at the same angle]]> 2016-08-29 16:40:09 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362218 We did not control the distance from our dropper to our coin. This definitely affected our results because the drops fell at different speeds. The farther away the drop fell from the coin, the faster it hit. Generally this would make the water spill over faster than if it was dropped from closer. We could control it by measuring the distance from our hand to the coin with a ruler and making sure our hand was in the right spot before each drop https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362350 2016-08-29 16:40:25 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362350 100020926 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362358 One variable we couldn't control was the amount of water that came out with every drop. One way we could have controlled it was by letting one person put both liquids in the penny

]]> 2016-08-29 16:40:27 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362358 Reasonable Solutions 100021236 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362371 One variable that could not be controlled was the exact amount of water that escaped the pipette. We could control it by using the thousand - dollar pipettes. Another variable was the rotation of the Earth and its internal vibrations. To achieve zero vibration, we could experiment on a tidally locked planet with no atmosphere, core, or moon. Expect results sometime in the next million years.

]]> 2016-08-29 16:40:29 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362371 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362708 One variable that was not controlled was the size of the drop. Also, sometimes I went in a circle around the penny instead of the center.]]> 2016-08-29 16:41:28 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120362708 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120363106 ONE VARIABLE THAT WE COULD NOT CONTROL WAS THE DROPS EVERYTHING ABOUT FROM THE PRESSURE THAT OUR PARTNERS PUT TO THE ANGLE THAT IT WAS AT HOW WE COULD CONTROL THIS IS BY HAVING SOME SORT OF SUPPORT AND THE SAME PERSON PUT THE SAME PRESSURE ON THE PIPETTE EVERY TIME. t(-_-t)]]> 2016-08-29 16:42:20 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120363106 https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120363350 One variable we didn't control was how high up the pipette was from the coin. Since the distance from the coin may have  greater for me, there may have been more of a splash , causing some water to fall out and making the amount of water in the penny less.]]> 2016-08-29 16:42:52 UTC https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120363350 TITLE https://padlet.com/lyudmila_shemyakina/g2ir14862o8p/wish/120364031
The cleanliness of the penny - there may have been grime or something that de/increased the cohesion of the water on one of the pennies.  A way we could have controlled this variable would be to clean all the pennies with tomato sauce/lemon/ vinegar or however you are supposed to clean pennies

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