Crime Busters B

Birdmusic
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Re: Crime Busters B

Postby Birdmusic » February 6th, 2018, 6:48 pm

pandascienceolympiad wrote:
Birdmusic wrote:Hi, I'm new to this event (and chemistry in general), so I have a couple of questions.

1) When my partner and I mixed iodine with flour mixed with water or cornstarch mixed with water, it didn't turn dark blue, any ideas why? We tried increasing the amount of water, flour/cornstarch, and iodine, but nothing happened still.

2) If one powder in a mixture dissolved and another didn't, how would you know? Wouldn't the water just be cloudy if one dissolved? Also, how would you know whether only one thing reacted with the HCl and iodine or both reacted?


1) Try to not mix the flour or cornstarch in water first. Also, your solutes and solvents might be old, try using newer ones.
2) Try looking at the mixture under a microscope first, and try and come up with possible powders it could be based on your results

Thank you! We got a new KI, and it seems to work much better.
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2018 Results
Regionals/States
Crime Busters: 1/2
Disease Detectives: 1/5
Hovercraft (both builds failed, rip): 11/9

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Re: Crime Busters B

Postby lamppost » February 7th, 2018, 1:09 pm

I'm also new to this event and I'd like to know-are we allowed to put charts on our sheets? Or should we not waste pages on that and fill it with other useful info?
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shrewdPanther46
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Re: Crime Busters B

Postby shrewdPanther46 » February 7th, 2018, 1:53 pm

There is nothing saying you cannot have charts on your cheat sheet. You can put whatever you want...
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Re: Crime Busters B

Postby Tailsfan101 » February 7th, 2018, 3:02 pm

lamppost wrote:I'm also new to this event and I'd like to know-are we allowed to put charts on our sheets? Or should we not waste pages on that and fill it with other useful info?

2018 Crime Busters rules wrote:...Teams may bring five double-sided 8.5" x 11" sheets of paper with information from any source.
2019 Treasure Valley Homeschool Wiki (Division B)
2018
State/Nats
Crime: 1/35
Road: 1/44
DD: 2/37
MM: 3/46

2017
State/Nats
DD: 1/16
DP: -/50
Road: 2/51
FF: 4/59

2019 events: Road Scholar, Crime Busters, Disease Detectives, Heredity
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Re: Crime Busters B

Postby Polarrr » February 14th, 2018, 6:53 am

lamppost wrote:I'm also new to this event and I'd like to know-are we allowed to put charts on our sheets? Or should we not waste pages on that and fill it with other useful info?


I think that putting charts for helping with powder and fiber identification would be useful... you do have five sheets front and back and you'd be surprised how much you can fit on there.

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Re: Crime Busters B

Postby shrewdPanther46 » February 14th, 2018, 7:02 am

In my opinion, they should change the event so that no even sheet is allowed, and also cut down on some of the random trivia asked, and stick more to the concept of the crime itself.
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Re: Crime Busters B

Postby Polarrr » February 14th, 2018, 12:26 pm

shrewdPanther46 wrote:In my opinion, they should change the event so that no even sheet is allowed, and also cut down on some of the random trivia asked, and stick more to the concept of the crime itself.


In my opinion, that wouldn't be a bad idea. However, since you mentioned that there are so many trivia questions on the tests currently, it's kind of useful to have the cheat sheets. Also, it's pretty convenient for a gentle reminder sometimes for polymer density or powders. Probably not going to happen but a good idea if they removed trivia. Would make the event a lot more challenging.

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Re: Crime Busters B

Postby Birdmusic » February 16th, 2018, 7:17 am

Polarrr wrote:
shrewdPanther46 wrote:In my opinion, they should change the event so that no even sheet is allowed, and also cut down on some of the random trivia asked, and stick more to the concept of the crime itself.


In my opinion, that wouldn't be a bad idea. However, since you mentioned that there are so many trivia questions on the tests currently, it's kind of useful to have the cheat sheets. Also, it's pretty convenient for a gentle reminder sometimes for polymer density or powders. Probably not going to happen but a good idea if they removed trivia. Would make the event a lot more challenging.


I think the amount of cheat sheets should be cut down to just one, and i agree, less trivia would be a good idea. However, removing cheat sheets altogether would make this event much more challenging.
I like birds.

2018 Results
Regionals/States
Crime Busters: 1/2
Disease Detectives: 1/5
Hovercraft (both builds failed, rip): 11/9

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Re: Crime Busters B

Postby shrewdPanther46 » February 16th, 2018, 8:23 am

Birdmusic wrote:
Polarrr wrote:
shrewdPanther46 wrote:In my opinion, they should change the event so that no even sheet is allowed, and also cut down on some of the random trivia asked, and stick more to the concept of the crime itself.


In my opinion, that wouldn't be a bad idea. However, since you mentioned that there are so many trivia questions on the tests currently, it's kind of useful to have the cheat sheets. Also, it's pretty convenient for a gentle reminder sometimes for polymer density or powders. Probably not going to happen but a good idea if they removed trivia. Would make the event a lot more challenging.


I think the amount of cheat sheets should be cut down to just one, and i agree, less trivia would be a good idea. However, removing cheat sheets altogether would make this event much more challenging.


With just a little bit of practice, it all becomes automatically ingrained. No need for a cheatsheet at all. But, the least they can do is cut it down to one sheet for years to come.
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Re: Crime Busters B

Postby Polarrr » February 16th, 2018, 10:07 am

shrewdPanther46 wrote:
Birdmusic wrote:
Polarrr wrote:
In my opinion, that wouldn't be a bad idea. However, since you mentioned that there are so many trivia questions on the tests currently, it's kind of useful to have the cheat sheets. Also, it's pretty convenient for a gentle reminder sometimes for polymer density or powders. Probably not going to happen but a good idea if they removed trivia. Would make the event a lot more challenging.


I think the amount of cheat sheets should be cut down to just one, and i agree, less trivia would be a good idea. However, removing cheat sheets altogether would make this event much more challenging.


With just a little bit of practice, it all becomes automatically ingrained. No need for a cheatsheet at all. But, the least they can do is cut it down to one sheet for years to come.


Yep, this is a great idea. When practicing with the powders and fibers continuously, this makes it very easy to recognize when in competition. However, maybe adding one cheat sheet for the uses of powders, metals, or information on soil or other miscellaneous things would be good. Definitely something they should change.

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Re: Crime Busters B

Postby Mcello5 » February 20th, 2018, 8:44 pm

knowthewrightstuff wrote:My team has had trouble identifying the difference between water and hydrogen peroxide since they are both odorless and have the same pH. We have tried shaking them and looking for bubbles, but both liquids bubble for us. Are there other methods we could try to effectively identify the difference between these liquids?


Try putting a few drops of iodine in with it and then shake it. Leave it sit for several minutes then if you see bubbles its hydrogen peroxide. Also try blue litmus paper but the more reliable route is the iodine.

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Re: Crime Busters B

Postby shrewdPanther46 » February 22nd, 2018, 1:07 pm

In terms of fibers, my partner and I are experiencing some difficulty. Since we must put animal, veg, or synthetic, is it possible for the ES to use some random fiber such as acetate or acrylic?

Also, tips for ID'ing between types as opposed to figuring out the specific fiber type?

Thank You!
salty

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Re: Crime Busters B

Postby SPP SciO » February 23rd, 2018, 2:49 am

lamppost wrote:I'm also new to this event and I'd like to know-are we allowed to put charts on our sheets? Or should we not waste pages on that and fill it with other useful info?


Something helpful if you're new: Write out a generalized template for the analysis portion. It will take up about 2% of your total "cheat sheet" area. Chances are you'll be rushing to finish this on time, and having a lot of it pre-written will help you remember how to maximize points on that section.
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Re: Crime Busters B

Postby dholdgreve » February 23rd, 2018, 12:05 pm

shrewdPanther46 wrote:In terms of fibers, my partner and I are experiencing some difficulty. Since we must put animal, veg, or synthetic, is it possible for the ES to use some random fiber such as acetate or acrylic?

Also, tips for ID'ing between types as opposed to figuring out the specific fiber type?

Thank You!

yes,... along with polyester, rayon, spandex, and nylon... Now the good news... It's all synthetic... You do not need (and should not) try to identify the specific type of synthetic... Many E/Ss will count it wrong if you try to be too specific!
Dan Holdgreve
Northmont Science Olympiad

Dedicated to the Memory of Len Joeris
"For the betterment of Science"

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Re: Crime Busters B

Postby shrewdPanther46 » February 23rd, 2018, 12:07 pm

Thank you for clarifying. So how would you go about ID ing juts the type as opposed to first IDing the exact fiber and then broadening to synthetic, animal, or veg?
salty


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