These objectives overlay the content objectives, and are assessed in the context of those objectives.
1. Design experiments
Students should understand the process of designing experiments, so they can:
a) Describe the purpose of an experiment or a problem to be investigated.
b) Identify equipment needed and describe how it is to be used.
c) Draw a diagram or provide a description of an experimental setup.
d) Describe procedures to be used, including controls and measurements to be taken.
2. Observe and measure real phenomena
Students should be able to make relevant observations, and be able to take measurements with a variety of instruments (cannot be assessed via paper-and-pencil examinations).
Post Discussion questions here:
Lab Builder
- The above is a resource allowing you to review and preview your final report
I just wanted to point out that the mass of the gum after being chewed was already significantly less (~30 grams) even without waiting for the saliva to dry, so it seems likely that this experiment will be a success. Another thing to note is that so far the nutritional facts label has been spot on, since the box contained more (170) pieces than the front of the label stated (165). I was wondering what other methods people had for drying the gum besides just waiting for it to evaporate? Any kind of heating up of the gum would cause it to get runny and melt unless it was done at very low temperatures which probably wouldn't be much more efficient than the sun and time, correct? Perhaps microwaving the gum wouldn't cause the gum to melt but could lead to some other complications (i don't think you're supposed to microwave rubber??). My group didn't use our extra piece since we felt that two days in the sun evaporating would be enough time for all the saliva to exit the gum.
ReplyDeleteWhat about a heat lamp? I'm planning to bring one in for the sophomore mod 2 class. However I would like to see the results of other methods such as blow dryer, evaporation...
Deletei'm also curious. Perhaps a little premature but one group used an oven and measured the weight before and after. Their difference was much higher than the difference my group has gotten so far through pure evaporation in sunlight (our's after 1 day didn't have a measurable change). Of course the experiment isn't done yet so maybe it will even out.
DeleteWhen will this lab be do? As I was unable to complete the lab because of guidance and I need to get the data from my partner still
ReplyDeleteWell some people didn't finish chewing the gum yet and it takes at least 1 day for the gum to dry out so i'd say you have plenty of time to complete the lab and exchange data, p90.
DeleteShould we be writing and turning in a pre and post lab along with our other lab work? -Jaz Popa
ReplyDeleteIs just the abstract part of the lab due tomorrow?
ReplyDelete-Casey Butrus