Tuesday, March 11, 2014
Making a Solution
In today's lab, which of the measurements were direct and which were derived? What other examples can you think of for direct and derived measurements? Why do you think we saw such a variance in our measurements today? What did your measurements prove in terms of the final mass of solutions?
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Quinn, the direct measurement was the plain water and the derived was the water with salt or salt water. Some other directs are O.J and water some derived would be lemonade and Pie
ReplyDeleteSorry I forgot the rest
ReplyDeleteQuinn's
I think we saw a variance in our measurements today because some people weren't as accurate our measurements proved that adding salt to water will change the mass : )
kaitlin,
ReplyDeleteHi miss yates. It's kaitlin. The measurements that were direct were 55-47 and the measurements that were derived were 55-50. Some other measure ments that were direct and derived were 59-48 and 50-45. I think we saw so many variances because it is pretty hard to tell the difference between even and non even. Our measurements proved in the final mass of solutions that all of our measurements were all really close to 5 or they were 5, and the answer was 5.
the direct was saltwater and the divered was the grams. I think others can be gravel and water. I think that we got the measurement different from the saltwater because salt can wieght some grams.we got 49 and 56 and 8.
ReplyDeleteAmelia
ReplyDeleteThe direct measurements was the salt and the derived measurements were the water and salt water.Kool aidhas derived and direct measurements! The direct measurements would be the kool aid powder, and the derived measurements would be the water and the actual drink. We probably saw a variance in the measurements because we did not all get the EXACT water and salt. This lab proved the final mass of absolution because we did several different trials.
In today's lab, which of the measurements were direct and which were derived? What other examples can you think of for direct and derived measurements?
ReplyDeleteI Did all the reviews once exert loved and 5 stars those I did twice I sat alone who am I
direct, salt solution water my height.
derived, salt, 64g+64km
Why do you think we saw such a variance in our measurements today? What did your measurements prove in terms of the final mass of solutions?
The levelness of the scoops might of been different, the water may have leaked like mine.
47 water I forgot the salt solution and salt
Rachel
ReplyDeleteWhat could have happened was that maybe someone was putting more or less water and salt, or they didn't quiet stir the water and salt all the way were some of salt dissolved. Also, the salt water was heavier than the water because salt has to weigh something, so it added 10 more grams of weight to the water. Ms. Yates i forgot what derived means again, i looked it up but couldn't get the concept.
The direct measurements were the amount of salt solution and water. The derived measurement was the amount of salt because we used the other information to find it. Other examples are finding perimeter, area, and the number of something by subtracting, dividing, adding, or multiplying.
ReplyDeletekatherin
ReplyDeletedirect= the amount we got
mass of OUR 50 ml of water
derived=the amount we calculated
mass of what we should have gotten close to
the amounts we got arrived because we might have not gotten exactly the same amount of salt or water
Pragathi
ReplyDeleteIn today's lab, the direct measurements were the water and saltwater weight. the derived measurement was the salt's weight. One example of direct and derived measurements is measuring the length and width of a box being the direct measurement, and the area being the derived measurement. I think we saw such a variance in our measurements today because of the variance in salt. Everybody does not have the same exact amount of salt. My measurements proved in terms of the final mass of solutions that saltwater weighed more than regular water because in the change of mass.
1) The salt solution was direct and the water was derived
ReplyDelete2) There was such a variance in our measurements because the solution weighed a little more because of the salt and the water had nothing in it so it weighed a little less.
3) It proved that there is more solution then water and then if you subtract the measurements they should be around 5g and that's what me and Auhona got.
PS: I sorry that I could not find the answer to the second one because I forgot my journal at school and forgot the diff. between direct and derived. :(
-Taylor
1) The direct was the water and salt solution. The derived was just the salt. 2) Some examples are sugar and water and tang powder and water. 3) I think we saw such a variance because salt and water solution can vary.
ReplyDeletePS. Sorry about #4. -Auhona
rohan
ReplyDeletewater and salt water were direct and salt was derived. Powder water is an example of a type. We saw a variation because some people had more water or salt added. Salt makes water heavier when it is added to it. That was my conclusion
From: Avinash
ReplyDeleteTo:Mrs.Yates
1) The salt any water measurements was derived because we couldn't clearly see the water.
2)The water only was direct because I could see the water clearly(sooo clear because water is transparent(: ).
3) We saw variance because some people probably estimated and some people probably didn't wait long enough for the balance to settle down.
4) In my final mass solution I weighed 56 grams.Probably got this answer because the cup itself is approximatley 0.5 grams. Next time you do this experiment I would reccomend asking the students to use foil. You would wrap the foil all around the hole where the cups went and then push the cup through the first layer to make the cup stable. Then, on the first layer around the hole created by the cup point some of the foil up to stablize the cup even more. You could aslo add tape to this. Just a suggestion, you don't have to do this though.
5) Next time I would aslo have another variable to put in the cup such as powder and then compare it to the other two cups.
6)The powder and salt thing aslo reaktes to our last experiment.
7)This was a great experiment, and I hope you consider my suggestions for nnext year.
Maria
ReplyDeleteWhy do you think we saw such a variance in our measurements today? What did your measurements prove in terms of the final mass of solutions?
In today's lab, the direct measurements were the weight of the water and the weight of the salt water. The derived measurement was the weight of the salt. An example that I can think of is: measure the length and width, but you calculate the area. I think that we had such a variance because people might have not have a level scoop of salt or the scales were not completely balanced. Also some people might have not waited for the scale to settle down completely. My final result were: 49 grams of water, 59 grams of saltwater, and 10 grams of salt.
Direct-measured(water and salt water)
ReplyDeleteDerived-figured out by calculations(salt)
Other measurements can be the weight of sugar figured out by measuring sugar without and sugar with water.
We could have seen such a variance because people could have measured the water wrong. People could have dropped or spilled salt or water.
The final mass of salt should have been 5.
Sourav