Crime Busters B

Anapolis
Member
Member
Posts: 168
Joined: December 10th, 2017, 6:54 pm
Division: Grad
State: IL

Re: Crime Busters B

Postby Anapolis » February 11th, 2019, 12:51 pm

Incineroar999 wrote:I am kinda stressed about this event. Is there an easy way to determine whether the hair is dog/cat/human?

definitely look up pictures of each hair, study what the different medullas look like.
2017 events
(n)
crime 5
road 19 (oof)

2018 events
(s/n)
fast facts 2/11
rocks 2/6
road 7/6
crime 2/3
widi 2/6
wright stuff (lol only did invies)

CPScienceDude
Member
Member
Posts: 121
Joined: December 12th, 2018, 2:40 pm
Division: B
State: IN
Location: Taft (I'm Ottosome)

Re: Crime Busters B

Postby CPScienceDude » February 11th, 2019, 3:21 pm

Anapolis wrote:
Incineroar999 wrote:I am kinda stressed about this event. Is there an easy way to determine whether the hair is dog/cat/human?

definitely look up pictures of each hair, study what the different medullas look like.

Or better yet, just borrow a microscope from your school's science department and look for yourself!
Last edited by CPScienceDude on February 12th, 2019, 7:18 pm, edited 1 time in total.
2019 Events - Thermo, Experimental Design, Crime Busters, Heredity, Mystery Arch.

Medals: 23
Hammond/Valpo/Regionals/State
Crime: 6/1/1/8
Exp Design: 2/x/x/x
Thermo: 3/9/1/4
Heredity: x/3/x/x
Mystery: x/x/1/4
Member of the Builder Cult
About me! https://scioly.org/wiki/index.php/User:CPScienceDude

olympicNovice2
Member
Member
Posts: 1
Joined: February 12th, 2019, 6:10 pm

Re: Crime Busters B

Postby olympicNovice2 » February 12th, 2019, 7:09 pm

This is my first time participating and would greatly appreciate some help with the following questions:

1) Do you get the full 50 minutes for the event Or is it less than 50 minutes from the time one opens the packet?

2) For the regional do they indicate how many of the unknowns are mixtures? On some of the national I see it in the instructions but it is not consistent. If the instructions don't state it should is it acceptable ask the Event Supervisor?

3) For Chromatography do they provide the following:
a) Beakers depending on the number of chromatograms to be developed.
b) Scotch table to attach the Chromatograms
c) Staplers to staple papers or Chromatograms to the paper.

User avatar
Crimesolver
Member
Member
Posts: 86
Joined: July 31st, 2018, 2:07 pm
Division: B
State: CA

Re: Crime Busters B

Postby Crimesolver » February 12th, 2019, 7:15 pm

olympicNovice2 wrote:This is my first time participating and would greatly appreciate some help with the following questions:

1) Do you get the full 50 minutes for the event Or is it less than 50 minutes from the time one opens the packet?

2) For the regional do they indicate how many of the unknowns are mixtures? On some of the national I see it in the instructions but it is not consistent. If the instructions don't state it should is it acceptable ask the Event Supervisor?

3) For Chromatography do they provide the following:
a) Beakers depending on the number of chromatograms to be developed.
b) Scotch table to attach the Chromatograms
c) Staplers to staple papers or Chromatograms to the paper.


1) yes or no. Depends on how chatty/how many questions people have. Most of the time they will try to give you 50 minutes to start the test, but you have to remember the cleanup time
2) It says in the rules that tests must indicate if a power is a mixture. If this info isn't in the test and you ask, the supervisor will probably tell you.
3) a) no, most of the time they will only give you 1 to work with. It's recommended to bring beakers anyways.
b) sometimes, if they're nice. Try to figure out how to do chromatography without attaching the paper with tape
c)yes, definitely a yes. Sometimes they provide tape, but they will most certainly provide you something to attach the chromatography onto your paper.
Current Events
R/S
Crime Busters 3rd
Thermodynamics 4th
Circuit Lab 4th
Potions and Poisons 5th
Battery Buggy what a failure

Keep on going :!:

CPScienceDude
Member
Member
Posts: 121
Joined: December 12th, 2018, 2:40 pm
Division: B
State: IN
Location: Taft (I'm Ottosome)

Re: Crime Busters B

Postby CPScienceDude » February 12th, 2019, 7:16 pm

olympicNovice2 wrote:This is my first time participating and would greatly appreciate some help with the following questions:

1) Do you get the full 50 minutes for the event Or is it less than 50 minutes from the time one opens the packet?

2) For the regional do they indicate how many of the unknowns are mixtures? On some of the national I see it in the instructions but it is not consistent. If the instructions don't state it should is it acceptable ask the Event Supervisor?

3) For Chromatography do they provide the following:
a) Beakers depending on the number of chromatograms to be developed.
b) Scotch table to attach the Chromatograms
c) Staplers to staple papers or Chromatograms to the paper.

1. From experience, you get closer to 40 min, between the ES explaining things and cleanup.
2. they should
3. a) no
b) sometimes
c) yes
2019 Events - Thermo, Experimental Design, Crime Busters, Heredity, Mystery Arch.

Medals: 23
Hammond/Valpo/Regionals/State
Crime: 6/1/1/8
Exp Design: 2/x/x/x
Thermo: 3/9/1/4
Heredity: x/3/x/x
Mystery: x/x/1/4
Member of the Builder Cult
About me! https://scioly.org/wiki/index.php/User:CPScienceDude

Anapolis
Member
Member
Posts: 168
Joined: December 10th, 2017, 6:54 pm
Division: Grad
State: IL

Re: Crime Busters B

Postby Anapolis » February 13th, 2019, 5:49 pm

CPScienceDude wrote:
Anapolis wrote:
Incineroar999 wrote:I am kinda stressed about this event. Is there an easy way to determine whether the hair is dog/cat/human?

definitely look up pictures of each hair, study what the different medullas look like.

Or better yet, just borrow a microscope from your school's science department and look for yourself!

on most of the tests i've taken, proctors have just given us pictures, but some proctors also might make u set up your own microscope slide so yeah you should practice that
2017 events
(n)
crime 5
road 19 (oof)

2018 events
(s/n)
fast facts 2/11
rocks 2/6
road 7/6
crime 2/3
widi 2/6
wright stuff (lol only did invies)

CPScienceDude
Member
Member
Posts: 121
Joined: December 12th, 2018, 2:40 pm
Division: B
State: IN
Location: Taft (I'm Ottosome)

Re: Crime Busters B

Postby CPScienceDude » February 13th, 2019, 5:51 pm

Anapolis wrote:
CPScienceDude wrote:
Anapolis wrote:definitely look up pictures of each hair, study what the different medullas look like.

Or better yet, just borrow a microscope from your school's science department and look for yourself!

on most of the tests i've taken, proctors have just given us pictures, but some proctors also might make u set up your own microscope slide so yeah you should practice that

Complete opposite for me. At the 3 comps ive been to I've had to prepare the slide.
2019 Events - Thermo, Experimental Design, Crime Busters, Heredity, Mystery Arch.

Medals: 23
Hammond/Valpo/Regionals/State
Crime: 6/1/1/8
Exp Design: 2/x/x/x
Thermo: 3/9/1/4
Heredity: x/3/x/x
Mystery: x/x/1/4
Member of the Builder Cult
About me! https://scioly.org/wiki/index.php/User:CPScienceDude

User avatar
Crimesolver
Member
Member
Posts: 86
Joined: July 31st, 2018, 2:07 pm
Division: B
State: CA

Re: Crime Busters B

Postby Crimesolver » February 13th, 2019, 5:58 pm

CPScienceDude wrote:
Anapolis wrote:
CPScienceDude wrote:Or better yet, just borrow a microscope from your school's science department and look for yourself!

on most of the tests i've taken, proctors have just given us pictures, but some proctors also might make u set up your own microscope slide so yeah you should practice that

Complete opposite for me. At the 3 comps ive been to I've had to prepare the slide.

They do recommend bringing microscope slides for the chemistry kits, so just be ready in case they do suddenly make you do microscope slides.
Current Events
R/S
Crime Busters 3rd
Thermodynamics 4th
Circuit Lab 4th
Potions and Poisons 5th
Battery Buggy what a failure

Keep on going :!:

CPScienceDude
Member
Member
Posts: 121
Joined: December 12th, 2018, 2:40 pm
Division: B
State: IN
Location: Taft (I'm Ottosome)

Re: Crime Busters B

Postby CPScienceDude » February 17th, 2019, 10:11 am

I'm curious as to how you guys differentiate between PETE and PVC. When it gets down to those 2 it gets kinda dicey. I know PETE is always clear, and on the CB sheet that the people before me made it said that PVC is never clear. I looked it up, though, and I found a lot of conflicting information about if PVC can be clear or not. For the sake of this, assume that you are given a hard, clear plastic that sinks in all the solutions. You get it between PVC and PETE. Where do you go from there?\
EDIT: No burn test results or common uses were given either.
2019 Events - Thermo, Experimental Design, Crime Busters, Heredity, Mystery Arch.

Medals: 23
Hammond/Valpo/Regionals/State
Crime: 6/1/1/8
Exp Design: 2/x/x/x
Thermo: 3/9/1/4
Heredity: x/3/x/x
Mystery: x/x/1/4
Member of the Builder Cult
About me! https://scioly.org/wiki/index.php/User:CPScienceDude

User avatar
Crimesolver
Member
Member
Posts: 86
Joined: July 31st, 2018, 2:07 pm
Division: B
State: CA

Re: Crime Busters B

Postby Crimesolver » February 17th, 2019, 10:18 am

CPScienceDude wrote:I'm curious as to how you guys differentiate between PETE and PVC. When it gets down to those 2 it gets kinda dicey. I know PETE is always clear, and on the CB sheet that the people before me made it said that PVC is never clear. I looked it up, though, and I found a lot of conflicting information about if PVC can be clear or not. For the sake of this, assume that you are given a hard, clear plastic that sinks in all the solutions. You get it between PVC and PETE. Where do you go from there?\
EDIT: No burn test results or common uses were given either.

Probably what the plastic is. If the plastic sample they give is like a water bottle cap, you couldn probably assume it’s PETE. If it’s a white piece of plastic that looks like a pipe, you could assume it’s PVC. Other than that, there really isn’t much more you could except guess.
Current Events
R/S
Crime Busters 3rd
Thermodynamics 4th
Circuit Lab 4th
Potions and Poisons 5th
Battery Buggy what a failure

Keep on going :!:

User avatar
jimmy-bond
Member
Member
Posts: 283
Joined: January 8th, 2018, 11:25 pm
Division: C
State: HI
Location: On Earth, I think

Re: Crime Busters B

Postby jimmy-bond » February 17th, 2019, 10:45 pm

CPScienceDude wrote:I'm curious as to how you guys differentiate between PETE and PVC. When it gets down to those 2 it gets kinda dicey. I know PETE is always clear, and on the CB sheet that the people before me made it said that PVC is never clear. I looked it up, though, and I found a lot of conflicting information about if PVC can be clear or not. For the sake of this, assume that you are given a hard, clear plastic that sinks in all the solutions. You get it between PVC and PETE. Where do you go from there?\
EDIT: No burn test results or common uses were given either.

PVC is indeed never clear. Apparently maple syrup has a density of 1.37, so that would narrow it down. If it's clear, however, I would say PETE.
If life gives you melons, you're dyslexic.

Roses are red, violets are blue, I have Alzheimer's, cheese on toast.

2019 Events
Chem Lab, Code Busters, DD, Fermi Questions, Forensics, Water Quality

2018 Nats
CB(26), DP (11), FF(1), MM(14), P&P(6)

2017 Nats
CB(36), DD(35), FF(2), MM(20)

utumn
Member
Member
Posts: 2
Joined: February 18th, 2019, 9:34 am

Re: Crime Busters B

Postby utumn » February 18th, 2019, 9:39 am

I'm doing some quick notes before regionals and I have a very important question about fibers!

All the information that I've found thus far has shown me how to ID fibers with burn tests, but I've been told by some people that there won't be burn tests happening at the event. Is that true? If so, how do I ID fibers without burning them?

amk578
Member
Member
Posts: 81
Joined: December 5th, 2018, 5:21 pm
Division: C
State: IN

Re: Crime Busters B

Postby amk578 » February 18th, 2019, 9:49 am

utumn wrote:I'm doing some quick notes before regionals and I have a very important question about fibers!

All the information that I've found thus far has shown me how to ID fibers with burn tests, but I've been told by some people that there won't be burn tests happening at the event. Is that true? If so, how do I ID fibers without burning them?


Whether or not burn tests are happening is up to the specific tournament, i.e. you can't always rely on just burn tests happening. If you won't be conducting burn tests, there are either two things happening. One, the test will give you a description of WHAT would happen when it burns and you would ID it from there or two, you simply have to look at the sample under a microscope and compare signifying features to ID the fiber.

I'd say practice by looking at pictures online, like look up "cotton microscope view" or test it under your own microscopes.
Events (r/s)

2018 - anatomy (1/2), crime (3/15), road (1/6)
2019 - anatomy (1/1), disease(2/2), heredity (1/1), road (1/5)

utumn
Member
Member
Posts: 2
Joined: February 18th, 2019, 9:34 am

Re: Crime Busters B

Postby utumn » February 20th, 2019, 8:31 pm

Was wondering how you can determine the speed of a vehicle based on its tire treads. I've already gotten the info for shoe prints, but I'm having trouble for the tire treads. Would it just be skid marks?

CPScienceDude
Member
Member
Posts: 121
Joined: December 12th, 2018, 2:40 pm
Division: B
State: IN
Location: Taft (I'm Ottosome)

Re: Crime Busters B

Postby CPScienceDude » February 21st, 2019, 4:16 am

utumn wrote:Was wondering how you can determine the speed of a vehicle based on its tire treads. I've already gotten the info for shoe prints, but I'm having trouble for the tire treads. Would it just be skid marks?

I’ve never seen something like that on a test before, but maybe if there’s distortion in the tracks? I’m really not sure though.
2019 Events - Thermo, Experimental Design, Crime Busters, Heredity, Mystery Arch.

Medals: 23
Hammond/Valpo/Regionals/State
Crime: 6/1/1/8
Exp Design: 2/x/x/x
Thermo: 3/9/1/4
Heredity: x/3/x/x
Mystery: x/x/1/4
Member of the Builder Cult
About me! https://scioly.org/wiki/index.php/User:CPScienceDude


Return to “Lab Events”

Who is online

Users browsing this forum: No registered users and 3 guests