Water Quality B/C

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Re: Water Quality B/C

Postby Flavorflav » March 10th, 2013, 9:02 am

stroudchick wrote:
Makeithappen wrote:
stroudchick wrote:Has anyone else had any difficulties creating their salinometers? It seems as though my clay either dissolves the salt within our solution or the distance between our 0% and 10% marks tend to be about 1 centimeter apart.


try using diffrent clay, and the numbers probably will be close no matter what


I have attempted about 4 different clays, but thank you for your suggestion! And sorry, I think I worded that incorrectly. There is only a 1 centimeter distance between our 0% and 10% mark. Like, each mark is about 1 millimeter apart. Have you happened to come across this issue?

Try Fun Tack, the stuff that you use to put posters up. It works much better than clay. As for the other problem, try to find a narrower straw.

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Re: Water Quality B/C

Postby caseyotis » March 10th, 2013, 9:23 am

Narrower straw? Try a narrower container. I used mine in a thin graduated cylinder, and the measurements were, say, a centimeter or two in between.
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Re: Water Quality B/C

Postby FueL » March 10th, 2013, 10:09 am

The measurement spaces should be the same regardless of the container you use, unless it sinks of course. Try to get your hands on waterproof clay (we reused ours from awesome aquifers two years ago :P), and yes, thinner straws are better. Maybe try a coffee stirrer straw.

My partner and I used a pretty thin bendy straw, and the differences in buoyancy still weren't that big. We were only able to mark 0, 5, and 10%.
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Re: Water Quality B/C

Postby stroudchick » March 10th, 2013, 1:58 pm

Thanks soo much guys! You're the best! :)

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Re: Water Quality B/C

Postby Cjkowalcz » March 11th, 2013, 12:34 pm

Are there any other recommended materials besides straws such as glass tubes for salinometers?
Also, did anybody make a simple, electronic salinometer? If so, how?
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2014 Regionals:
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Meteorology: 2nd
Experimental Design: 1st
2014 States:
???
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Re: Water Quality B/C

Postby caseyotis » March 11th, 2013, 5:15 pm

Cjkowalcz wrote:Are there any other recommended materials besides straws such as glass tubes for salinometers?
Also, did anybody make a simple, electronic salinometer? If so, how?


It's ridiculously easy to make a straw-clay salinometer, and additional stuff wouldn't help that much.
I looked for two hours for a simple electronic one, and I couldn't find one. .-. I didn't really need one, though. You're better off not wasting your time.
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Re: Water Quality B/C

Postby Makeithappen » March 11th, 2013, 6:22 pm

Just an idea,maybe if you wait a plain old straw, yould just half to mark it, and then youd have a salinometer
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Re: Water Quality B/C

Postby Blwrunner » March 13th, 2013, 6:13 pm

Hey. I was just wondering if there were many questions about estuaries on any tests you guys took. On the test I took there were none. :lol:
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2013 Comet Invitational:

Experimental Design- 1st place
Metric Mastery- 2nd place
Water Quality- 2nd place


2013 Regionals

Water Quality- 1st place
Write it/do it- 3rd place
Forestry- 4th place

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Re: Water Quality B/C

Postby Cjkowalcz » March 13th, 2013, 6:38 pm

Blwrunner wrote:Hey. I was just wondering if there were many questions about estuaries on any tests you guys took. On the test I took there were none. :lol:


They may not have been on your test, but they are definitely something to know! Just read up on them and maybe add to your notes if you have room.
2014 Rustin Invitational:
Entomology: 5th
Experimental Design: 1st
2014 Regionals:
Entomology: 3rd
Meteorology: 2nd
Experimental Design: 1st
2014 States:
???
Medal Count: 14 (Hoping for 15 after my last B-division States ;))

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Re: Water Quality B/C

Postby Cjkowalcz » March 14th, 2013, 12:51 pm

No conflicting events like regionals!! Now I will finally be able to take part in this event! (at States)
2014 Rustin Invitational:
Entomology: 5th
Experimental Design: 1st
2014 Regionals:
Entomology: 3rd
Meteorology: 2nd
Experimental Design: 1st
2014 States:
???
Medal Count: 14 (Hoping for 15 after my last B-division States ;))

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Re: Water Quality B/C

Postby caseyotis » March 14th, 2013, 3:04 pm

I only saw a few multiple-choice questions on estuaries. I predict that they'll be on the state test, though.
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Re: Water Quality B/C

Postby Blwrunner » March 14th, 2013, 3:16 pm

Okay good. I was worried that there was going to be a large diagram on the test. That was the only change they made on the event this year...correct? :|
Image

2013 Comet Invitational:

Experimental Design- 1st place
Metric Mastery- 2nd place
Water Quality- 2nd place


2013 Regionals

Water Quality- 1st place
Write it/do it- 3rd place
Forestry- 4th place

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Re: Water Quality B/C

Postby caseyotis » March 14th, 2013, 4:33 pm

Blwrunner wrote:Okay good. I was worried that there was going to be a large diagram on the test. That was the only change they made on the event this year...correct? :|


I believe so. I couldn't tell any difference, and I got first both times... But that was the regionals test. I haven't seen the states test before.
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Re: Water Quality B/C

Postby Azismith » March 29th, 2013, 11:28 am

Does temperature affect pH? If it does, does it acidify the water? Also, if it does, why does this happen?

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Re: Water Quality B/C

Postby caseyotis » March 29th, 2013, 11:34 am

Azismith wrote:Does temperature affect pH? If it does, does it acidify the water? Also, if it does, why does this happen?


As temperature of water rises, it becomes more acidic (pure water is only at a pH of 7 at 25 degrees Celsius). This is due to the breakdown of water molecules into their original constituents (hydrogen and oxygen). Producing more hydrogen than oxygen acidifies the water. I don't know if this would be on a test though, but it is a very good question.
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