https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k Let's share ideas about controlled variables! en-us 2016-08-29 17:22:33 UTC 2016-08-29 18:50:53 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Growing.png lyudmila_shemyakina https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120393808 Please write...
1. One variable you couldn't control and why. 
2. How you could control that variable in the future. 

]]> 2016-08-29 18:12:59 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120393808 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402087 One variable we could not control was the speed of the water droplet falling. We can control that by making a robot and having him/her do it for us]]> 2016-08-29 18:36:58 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402087 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402209 One variable we couldn't control was the speed of the water dropping and what height it dropped from. If we did this experiment again we could make a robot that drops water from the same heigh and speed every time.

]]> 2016-08-29 18:37:17 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402209 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402316 One variable you could not control was the different bumps on both sides of the penny. How you could control this variable in the future is by making sure you are using the same side for both pennies. 

]]> 2016-08-29 18:37:33 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402316 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402351 The ]]> 2016-08-29 18:37:38 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402351 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402366 The variables that you can control are how fast you drop the penny and how how high you drop the water from. The variable you can't control is how corroded the penny was. ]]> 2016-08-29 18:37:40 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402366 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402384 We could not control how fast the water dropped onto the penny. If we had a lot more money, we could possibly build a robot that would be able to do that much more precisely than a human could. ]]> 2016-08-29 18:37:42 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402384 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402392 A variable that we could not control are the coins because we cannot have two of the exact same coin. Ideally, we would have two recently made coins rather than coins made ten years apart or so]]> 2016-08-29 18:37:43 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402392 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402402 We could not control how level the paper towel was. We might be able to control it if we put something heavy on the corners or did not use a paper towel at all.

]]> 2016-08-29 18:37:44 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402402 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402403 One vriable ]]> 2016-08-29 18:37:44 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402403 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402405 A variable we couldn't control was the exact speed of the water dropping onto the penny and the exact distance from the penny to the pipette. This is because we aren't machines and can't exactly drop the water at the exact speed, or drop it from the same height because our hand may shake or we accidentally move it. 
If I had another chance at redoing the lab, I would get a machine to do the dropping to get more accurate results.]]> 2016-08-29 18:37:45 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402405 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402468 I can't control on wasting paper towels.  We can not waste paper towels, we need to save paper towels.  In the future, we should not use paper towels, we should use reusable wood so after the lab, we don't have to throw it away, we would just clean it and use it again for the next lab.]]> 2016-08-29 18:37:54 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402468 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402517 One variable we couldn't control was the speed the solution was dropped. You could control it by having a machine drop the solution at the same speed each time.]]> 2016-08-29 18:38:04 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402517 100020176 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402525 a variable we cannot control is the slight differences in area/shape of the penny, we can control it better next time by measuring and comparing two pennies that look very similar.]]> 2016-08-29 18:38:04 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402525 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402563 one veriable we can control is how fast you drop the water on the penny another on is how much soap you put in the water.

]]> 2016-08-29 18:38:14 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402563 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402574 one thing that we can change was how fast we dropped the water]]> 2016-08-29 18:38:16 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402574 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402619 We couldn't control the temperature of the water because we didn't have any of the materials such as a thermometer, or ice to keep it at a steady temperature. ]]> 2016-08-29 18:38:24 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402619 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402621 One variable we couldn't control in this experiment was the amount of rust on the coin. It could have made it less adhesive and added tiny bumps that could have offset the water. But one way we could have controlled it is it we had 2 brand new coins that had no rust on it.]]> 2016-08-29 18:38:24 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402621 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402826 One variable that we couldn't control was the water. One way way could control that in the future is using the same penny and dropping the water at the same height every time]]> 2016-08-29 18:39:01 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120402826 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120403003 We could buy new penny's in the future and put them on the same side. And also so that they don't have any rust on them.]]> 2016-08-29 18:39:29 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120403003 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120403545 One variable we couldn't control was the amount of amount of rust on the coin. The rust could have taken up space where the water could have gone.]]> 2016-08-29 18:41:18 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120403545 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120404009 We couldn't control how dirty or rusty the coin was so it could be unlevel. If we did control this then we could bring lots of pennies.]]> 2016-08-29 18:42:39 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120404009 https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120404088 We couldn't control the exact shape of the ridges and such on the penny ]]> 2016-08-29 18:42:51 UTC https://padlet.com/lyudmila_shemyakina/ro5a17ovkq1k/wish/120404088