Do you know about what magnification would be required to see the differences? Would 400x be enough? I know we have compound microscopes in our school that reach 400x... Thanks a lot!cupcakegirl wrote:All I can say is look at the microscope again. It takes a decent microscope adequately focused to see what you need to differentiate them. It's pretty rare to get a decent focused microscope at competitions prior to State, in my experience. However, if you do get a good microscope, it's pretty easy and obvious.ak12 wrote:Hello! Does anyone have a definite way to distinguish between cat, dog, and human hair? I know that cat hair is supposedly the finest and dog hair is the roughest and most rigid and I even know what they are supposed to look like under a microscope(cat - supposed to look like its braided, dog - supposed to look like "flakes" are coming off of it, human - most even). Unfortunately, all the hairs look the same to our team under a microscope and the physical properties can usually only be used when comparing all three. Is there any way you guys know of?
Crime Busters B
- ak12
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Re: Crime Busters B
2013 States: Exp Des-3rd, Road-5th
2014 States: Exp Design-3rd
2014 Nats: Crime-5th, WIDI-9th, Exp Des-10th
2015 States: Crime-2nd, Disease-2nd, Exp Des-1st
2016 Nats: Bio-Process-1st, WIDI-6th, Exp Des-10th, Crime-11th
2014 States: Exp Design-3rd
2014 Nats: Crime-5th, WIDI-9th, Exp Des-10th
2015 States: Crime-2nd, Disease-2nd, Exp Des-1st
2016 Nats: Bio-Process-1st, WIDI-6th, Exp Des-10th, Crime-11th
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Re: Crime Busters B
400x is way more than enough. You should be able to see differences with 40xak12 wrote:Do you know about what magnification would be required to see the differences? Would 400x be enough? I know we have compound microscopes in our school that reach 400x... Thanks a lot!cupcakegirl wrote:All I can say is look at the microscope again. It takes a decent microscope adequately focused to see what you need to differentiate them. It's pretty rare to get a decent focused microscope at competitions prior to State, in my experience. However, if you do get a good microscope, it's pretty easy and obvious.ak12 wrote:Hello! Does anyone have a definite way to distinguish between cat, dog, and human hair? I know that cat hair is supposedly the finest and dog hair is the roughest and most rigid and I even know what they are supposed to look like under a microscope(cat - supposed to look like its braided, dog - supposed to look like "flakes" are coming off of it, human - most even). Unfortunately, all the hairs look the same to our team under a microscope and the physical properties can usually only be used when comparing all three. Is there any way you guys know of?
2015 Events
Protein Modeling
Cell Biology
Disease Detectives
Chem Lab
Protein Modeling
Cell Biology
Disease Detectives
Chem Lab
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Re: Crime Busters B
Hi! Does anybody know if it is required for the analysis to be written in complete sentences? Thanks!
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Re: Crime Busters B
It really just depends on the test. I've had some tests in which the analysis is already written for you and you just need to right in the info on what unknowns point to a suspect. I've also had tests in which they just give us a blank sheet of paper with lines on it and have us write an analysis (in complete sentences). It really just depends on the test. Sorry, I wish I could be more helpful.zy__karen17 wrote:Hi! Does anybody know if it is required for the analysis to be written in complete sentences? Thanks!
2015 Events
Protein Modeling
Cell Biology
Disease Detectives
Chem Lab
Protein Modeling
Cell Biology
Disease Detectives
Chem Lab
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Re: Crime Busters B
So a couple of my friends in B division have a question. Can anyone differentiate between inconclusive and circumstantial evidence?
- ak12
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Re: Crime Busters B
Circumstantial evidence is a piece of evidence that points a finger towards someone or a group of people, but does not prove anyone's guilt, while inconclusive evidence is evidence that does not even incriminate anyone. For example, a janitor's fingerprint on a door handle of a school after hours is inconclusive, since the janitor had every right to be in the school after-hours. Meanwhile, if a student's fingerprint was found there after-hours, it would by circumstantial. On a completely different note, does anyone have a definite way to distinguish how many and which powders are in a mixture of two or three?
2013 States: Exp Des-3rd, Road-5th
2014 States: Exp Design-3rd
2014 Nats: Crime-5th, WIDI-9th, Exp Des-10th
2015 States: Crime-2nd, Disease-2nd, Exp Des-1st
2016 Nats: Bio-Process-1st, WIDI-6th, Exp Des-10th, Crime-11th
2014 States: Exp Design-3rd
2014 Nats: Crime-5th, WIDI-9th, Exp Des-10th
2015 States: Crime-2nd, Disease-2nd, Exp Des-1st
2016 Nats: Bio-Process-1st, WIDI-6th, Exp Des-10th, Crime-11th
- cupcakegirl
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Re: Crime Busters B
Honestly, I think it truly depends on the person. I have found that if you just slow down and really look at both the powder sample and the reactions, you can kind of tell what parts are reacting and such. The only thing I can say with this event is practice, practice, practice. Close to nats, I focused on taking powders tests comprised solely of mixtures and I think it was beneficial. Turned out pretty well I guess (got 4th at nats).ak12 wrote:Circumstantial evidence is a piece of evidence that points a finger towards someone or a group of people, but does not prove anyone's guilt, while inconclusive evidence is evidence that does not even incriminate anyone. For example, a janitor's fingerprint on a door handle of a school after hours is inconclusive, since the janitor had every right to be in the school after-hours. Meanwhile, if a student's fingerprint was found there after-hours, it would by circumstantial. On a completely different note, does anyone have a definite way to distinguish how many and which powders are in a mixture of two or three?
2013 Nationals Results: Water Quality-2nd, Food Science-6th, Crime Busters-13th, Team- 7th
2014 National Results: Water Quality- 7th, Can't Judge A Powder- 6th, Crime Busters- 4th, Heredity- 5th, Team- FIRST!!!
2015 Events: Forensics, Green Generation, Fossils
2014 National Results: Water Quality- 7th, Can't Judge A Powder- 6th, Crime Busters- 4th, Heredity- 5th, Team- FIRST!!!
2015 Events: Forensics, Green Generation, Fossils
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Re: Crime Busters B
Hello Everyone,
This is my first time coaching a Science Olympiad team. Can anyone share the last test (2014) or links to some good resources for this subject?
Appreciate any help,
Thanks in advance.
This is my first time coaching a Science Olympiad team. Can anyone share the last test (2014) or links to some good resources for this subject?
Appreciate any help,
Thanks in advance.
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