Crime Busters B

CVMSAvalacheStudent
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Re: Crime Busters B

Postby CVMSAvalacheStudent » Wed Feb 08, 2017 11:34 pm

I still remember doing this event. The fingerprints was the most confusing part, everything else was easy.
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Skink
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Re: Crime Busters B

Postby Skink » Thu Feb 09, 2017 2:39 am

23aeg01 wrote:I was wondering if anybody could give me some tips on how to tell if during powder analysis, which powders are mixtures.

Per 3.a. in the rules, you'll be told if they're mixtures or not. The tricky part is figuring out what their components are, and there are too many to practice every combination. I'd make a handful and really work out the process of identifying one component followed by the other. Also, think like a supervisor. It's a far better question to mix sugar with cornstarch than it is to mix sugar and salt, for example.

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Re: Crime Busters B

Postby Vince » Fri Feb 10, 2017 3:33 am

CVMSAvalacheStudent wrote:I still remember doing this event. The fingerprints was the most confusing part, everything else was easy.

Fingerprinting is actually the easiest. It's just matching.

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Re: Crime Busters B

Postby Hermione » Thu Feb 16, 2017 7:50 pm

Is there any burn tests for fibers in invitationals? Please Answer I have a tournament this saturday :P

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Re: Crime Busters B

Postby egbertghost » Thu Feb 16, 2017 11:52 pm

Hermione wrote:Is there any burn tests for fibers in invitationals? Please Answer I have a tournament this saturday :P


I had the burn test at an invitational (MIT Kingwood), and sadly I didn't leave room in my notes for burn tests. :cry: I would recommend that you add information just in case, because you can never be sure what they will put.
Good luck!!
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Re: Crime Busters B

Postby BobbyJoe » Tue Feb 21, 2017 11:54 pm

egbertghost wrote:
Hermione wrote:Is there any burn tests for fibers in invitationals? Please Answer I have a tournament this saturday :P


I had the burn test at an invitational (MIT Kingwood), and sadly I didn't leave room in my notes for burn tests. :cry: I would recommend that you add information just in case, because you can never be sure what they will put.
Good luck!!

Having notes on burn tests are very useful. Most competitions will have burn tests. I'm sure if you did some research online you could find a flowchart of some sort on this subject.
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2017: 1/5/3/1/2/12
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Re: Crime Busters B

Postby crimebuster1 » Mon Mar 06, 2017 3:27 am

does anyone have any tips for identifying mixtures?

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Re: Crime Busters B

Postby crimebuster1 » Mon Mar 06, 2017 7:01 pm

Hermione wrote:Is there any burn tests for fibers in invitationals? Please Answer I have a tournament this saturday :P


Most of the competitions that I have been to don't have materials for burn tests but it is definitely something worth having. I use a flowchart for my notes.

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Re: Crime Busters B

Postby arkhamknight43_ » Thu Mar 09, 2017 11:21 pm

Hello

I was wondering about how the hairs will be tested in the Crime Busters State Comp.

Thanks

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Re: Crime Busters B

Postby ssa1125 » Thu Mar 16, 2017 3:02 pm

I have a few questions about what to do for crime busters. It's my first time doing this event.

1.) How are we supposed to identify the mixed solids?
2.) How do we compose the paragraph where we have to write about our research process?
3.) Are we provided with microscopes?

Thank you!

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Re: Crime Busters B

Postby Skink » Fri Mar 17, 2017 3:46 am

1. I've given an opinion on this in this and past topics. Please read back.

2. It depends on the supervisor, but, generally, it's not how but what you write. Some teams write bullet points, while others do essay or paragraph form. I don't see one as more or less complete than the other and more an issue of style.

3. Microscopes are provided if they're expected to be used.

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Re: Crime Busters B

Postby Science37 » Sun Mar 19, 2017 2:12 pm

Does anyone know how to differentiate between salt and sugar other than looking at its shape?

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Re: Crime Busters B

Postby zmyshatlp » Sun Mar 19, 2017 2:18 pm

Skink wrote:Per 3.a. in the rules, you'll be told if they're mixtures or not. The tricky part is figuring out what their components are, and there are too many to practice every combination. I'd make a handful and really work out the process of identifying one component followed by the other. Also, think like a supervisor. It's a far better question to mix sugar with cornstarch than it is to mix sugar and salt, for example.

Hey... only 45 combinations of two components and 120 combinations of three components

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Re: Crime Busters B

Postby crimebuster1 » Mon Mar 20, 2017 5:46 pm

does anyone know if there are changes to crime at the state competitions (specifically norcal)?

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Re: Crime Busters B

Postby TheRarePinkSheep » Wed Mar 22, 2017 5:03 pm

Science37 wrote:Does anyone know how to differentiate between salt and sugar other than looking at its shape?


The only difference is grains. I recommend looking at salt and sugar and comparing them to each other. Once you know what each looks respectively, it shouldn't be hard. ;)
Crimebusters/Food Science/Meteorology


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