Sunday, September 30, 2012

Chem blog week 2

 Even though I missed a few days of chemistry this week i still got a brain full! This week we were learning a lot about mass and volume. Before the two used to just get jumbled together but now I know the actual difference. While mass is the amount the object contains volume is the amount of volume it has. I was able to apply this knowledge to an experiment we had to do involving different  prisms. But when finding the measurements out we found that in order to be accurate I would have to use not only use the volume we measured, but the one we calculated. This is more accurate because sometimes we get things wrong but that is just human error and by calculating it we are able to be more sure in our results. The answer can also be different based on how you are measuring your object from on side the water was perfectly measured, and on the other it looked like it had less in the graduated  cylinder. Something else that was more reviewed than learned was that mass did not determine the size of the object and vice versa. We watched this cute video about it and though it was kinda funny it was completely true. For example, if you see a giant cube of  styrofoam next to a small block of lead some would believe that the larger block would have more mass. But the truth is that while the lead cube was smaller it was more massive. This is how volume and mass are different in one way: you can  determine volume based on the size of the object but you can't in finding the mass. I was gone Thursday and Friday but I was told that we did and experiment using different sized blocks and they needed to find their  mass and their volume. In order to find the volume we had to use the height and the length and in order to find find the mass we used the scale. That also brings up a point about accuracy. With the scale you have to very precise with your measurements, in not you overall data could be  incorrect and could affect the experiment greatly. They then learned that there is no actual relationship between mass and volume which is incredible to me because they used so much together. Overall this week has gone pretty well even though I missed a couple of days I should be able to catch up on everything the following week and do well on our first chem assessment but it is not the same as experiencing  the class and learning hands on. I believe that I put  in a lot of effort in chemistry this week and I was really involved with what we were learning. Next week I hope to learn more about volume and density and things that are connected with them. I am having a great time in chemistry and I am excited for next week to come!


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