Science Crime Busters B

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Phenylethylamine
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Re: Science Crime Busters B / Forensics C

Post by Phenylethylamine »

2win wrote:i am now worried about identifying powders... i've never done that before...
gyourkoshaven wrote:It's not too hard, just study a lot. Mixtures are a weak point of mine though.
Yeah, last year I was pretty worried about memorizing all the powders for SCB, but before long I wasn't using my reference sheet at all (not to mention that you have a reference sheet, so if you do forget some of the characteristics of certain powders, you can still look it up).

And yes, mixtures are obnoxious. At Regionals last year, we were given just salt, TWO just sugar, and a sugar/salt mixture. Although I think it said somewhere in the rules that which ones are mixtures should be specified, they almost never are.
At Nationals last year, though, the mixtures were pretty cleverly specified- instead of saying on the list of substances or on the answer sheet which ones were mixtures, you had to read through the list of substances and see that some were from presumably pure containers that had spilled, while others were on certain people's shoes, or things like that, showing that those ones were- or could be- mixtures. [Powders at Nats was kind of a nightmare, though; there were something like eleven powders/mixtures, and EIGHT of them were or included flour. It made sense, since it was a crime at a cupcake-baking competition, but I swear it scared the heck out of me. I still finished the powders much more quickly than usual, but it would have taken me even only half the time that it did if I hadn't double-checked and triple-checked all the flour ones to make sure i wasn't just being an idiot (turned out to be good, because the third time I realized that one powder I'd put down as just flour was actually a mixture of flour and sugar lol).]
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Re: Science Crime Busters B / Forensics C

Post by karatekid44 »

Phenylethylamine wrote:
2win wrote:i am now worried about identifying powders... i've never done that before...
gyourkoshaven wrote:It's not too hard, just study a lot. Mixtures are a weak point of mine though.
Yeah, last year I was pretty worried about memorizing all the powders for SCB, but before long I wasn't using my reference sheet at all (not to mention that you have a reference sheet, so if you do forget some of the characteristics of certain powders, you can still look it up).

And yes, mixtures are obnoxious. At Regionals last year, we were given just salt, TWO just sugar, and a sugar/salt mixture. Although I think it said somewhere in the rules that which ones are mixtures should be specified, they almost never are.
At Nationals last year, though, the mixtures were pretty cleverly specified- instead of saying on the list of substances or on the answer sheet which ones were mixtures, you had to read through the list of substances and see that some were from presumably pure containers that had spilled, while others were on certain people's shoes, or things like that, showing that those ones were- or could be- mixtures. [Powders at Nats was kind of a nightmare, though; there were something like eleven powders/mixtures, and EIGHT of them were or included flour. It made sense, since it was a crime at a cupcake-baking competition, but I swear it scared the heck out of me. I still finished the powders much more quickly than usual, but it would have taken me even only half the time that it did if I hadn't double-checked and triple-checked all the flour ones to make sure i wasn't just being an idiot (turned out to be good, because the third time I realized that one powder I'd put down as just flour was actually a mixture of flour and sugar lol).]

Powders were always the easiest what im worried about is the water testing.
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Re: Science Crime Busters B / Forensics C

Post by crazyredhead42 »

Water testing seems to be the big deal. I think that we need to know What each test means, and how to do it. They should give us the necessary supplies for the actual tests. The water tests they give us will probably have directions.
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Re: Science Crime Busters B / Forensics C

Post by ddudealex1 »

Does anyone have a good way to study for the powder part? :?: :?: :?:
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Re: Science Crime Busters B / Forensics C

Post by karatekid44 »

yes here is what i do i take a data sheet with all the powders and how to find them.

Then once you have that down, take a sample plate and put some unkown powders in the plate and try to figure them out.

The Go over the ones you missed and try to solve them again.

Repeat until you are awesome
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Re: Science Crime Busters B / Forensics C

Post by ddudealex1 »

OK. Thanks for info.
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Re: Science Crime Busters B / Forensics C

Post by Frenchie_34 »

Okay, first of all, you all seem to be on teams where you do this year round and powders isn't a big deal and you have it all memorized. Well, i go to a school where we were told our first event in the end of September, and the rest beginning of November, and we NEVER have powders memorized. We are allowed to bring in a 2-sided pages of notes, so 2 words: flow chart. Just to help if anyone is on ateam like mine. We always check it. But I really, really need help with water testing. I have no clue wher to start.
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Re: Science Crime Busters B / Forensics C

Post by karatekid44 »

First statrt with the wiki

http://scioly.org/wiki/Main_Page

Then sift through the old archived forums

Or go to

http://soinc.org/science_crime_busters_b

the second website has a lot of links which can help you
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Re: Science Crime Busters B / Forensics C

Post by Phenylethylamine »

Frenchie_34 wrote:Okay, first of all, you all seem to be on teams where you do this year round and powders isn't a big deal and you have it all memorized. Well, i go to a school where we were told our first event in the end of September, and the rest beginning of November, and we NEVER have powders memorized. We are allowed to bring in a 2-sided pages of notes, so 2 words: flow chart. Just to help if anyone is on ateam like mine. We always check it. But I really, really need help with water testing. I have no clue wher to start.
While it's true my team is very involved, and I did memorize the powders when I did SCB last year, but I memorized them by having a chart on my sheet... that is, I used my sheet in practice events, and eventually I stopped having to look at it so much. I still had the chart with me in competition in case I needed it. However, if you're short on space for whatever reason, powders might be something to consider leaving off the sheet; it's probably easier to memorize the powders than all the different information for the various other sections.
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Re: Science Crime Busters B / Forensics C

Post by Frenchie_34 »

Phenylethylamine wrote:
Frenchie_34 wrote:Okay, first of all, you all seem to be on teams where you do this year round and powders isn't a big deal and you have it all memorized. Well, i go to a school where we were told our first event in the end of September, and the rest beginning of November, and we NEVER have powders memorized. We are allowed to bring in a 2-sided pages of notes, so 2 words: flow chart. Just to help if anyone is on ateam like mine. We always check it. But I really, really need help with water testing. I have no clue wher to start.
While it's true my team is very involved, and I did memorize the powders when I did SCB last year, but I memorized them by having a chart on my sheet... that is, I used my sheet in practice events, and eventually I stopped having to look at it so much. I still had the chart with me in competition in case I needed it. However, if you're short on space for whatever reason, powders might be something to consider leaving off the sheet; it's probably easier to memorize the powders than all the different information for the various other sections.
Practice events? What practice events?
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