Water Quality B/C

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Re: Water Quality B/C

Postby PicturePerfect » February 26th, 2014, 7:58 pm

The answer to your first question is Brazil. Despite being in a tropical location, no reefs form because the massive Amazon and Orinoco rivers deliver tons of sediment/nutrients that discourages coral reefs from growing.


For your second question, the answer I believe is euryhaline, meaning it can tolerate a wide variety of salinities.
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Re: Water Quality B/C

Postby PicturePerfect » February 26th, 2014, 8:20 pm

Sorry for the double post...
What is the main function of the mesenterial filaments of a coral polyp?
a. They act to stun prey that will then be consumed
b. They provide homes for symbiotic algae
c. They produce gametes that are released during broadcast spawning
d. They are used to attack neighbouring coral colonies

I found websites that say the filaments are used both to capture prey and to attack other colonies, but if you could only pick one, which would it be?
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Re: Water Quality B/C

Postby PacificGoldenPlover » February 26th, 2014, 10:30 pm

Yeah, I realized that mistake after I made the key. (For what it's worth, when I was grading, I gave points to either answer)

If that were on a test though, I would answer attacking other colonies, simply because it is simply one of many methods by which coral filter feed, while they are the principal way they attack other colonies. If that does come up on another test, you may want to politely let the proctor know.

Sorry for any confusion.
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Re: Water Quality B/C

Postby Watergirl » February 27th, 2014, 9:14 pm

:D I hope I don't sound nosy and all, but are all those questions from the Mesa Robles Invitational Test? :D
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Re: Water Quality B/C

Postby PicturePerfect » February 27th, 2014, 9:27 pm

Yeah, I realized that mistake after I made the key. (For what it's worth, when I was grading, I gave points to either answer)

If that were on a test though, I would answer attacking other colonies, simply because it is simply one of many methods by which coral filter feed, while they are the principal way they attack other colonies. If that does come up on another test, you may want to politely let the proctor know.

Sorry for any confusion.
O.O did you write that test?
Okay, thanks!
:D I hope I don't sound nosy and all, but are all those questions from the Mesa Robles Invitational Test? :D
Yes :P
2012-2013 Event Name | Best Finish |
Heredity | 2nd
Forestry | 3rd
Food Science | 5th
Team | 1st

2013-2014 Event Name | Best Finish |
Heredity | 4th
Water Quality | 7th
Shock Value | 7th
Wheeled Vehicle | 7th

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Re: Water Quality B/C

Postby PacificGoldenPlover » February 27th, 2014, 10:14 pm

Yeah, I wrote it, as well as the Muscatel Water Quality test.
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2014 (Mira Loma/Troy/Regionals/States/Nationals)
Dynamic Planet (2/2/1/1/1)
Designer Genes (1/4/1/13 (???)/13 (figures)
Water Quality (1/1/3/1/3)

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Re: Water Quality B/C

Postby Watergirl » February 28th, 2014, 7:48 pm

Haha I felt like that question was pretty familiar xP.
Having trouble in the waste water treatment.
I can't really find any site that would explain it in an easier way.
Does anyone know a site where it explains it well?
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Re: Water Quality B/C

Postby stroudchick » March 4th, 2014, 6:59 pm

Has anyone run into a problem with the increments on their salinometer? My 0% and 10% saturation lines seem to be about 2 cm apart every time. Leaves hardly any room for the "in-between" increments.

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Re: Water Quality B/C

Postby EastStroudsburg13 » March 4th, 2014, 8:04 pm

If you're using the simple salinometer that's listed on the national website (which is alright, I used one of them my senior year and it was definitely accurate enough, and only took one meeting to build and calibrate), then you have to try to get as tall and thin of a container as possible. A graduated cylinder works best in my experience (I think I used a 100 mL one), but if you find a container that you like better then by all means use that.
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Re: Water Quality B/C

Postby darkdeserthighway » March 5th, 2014, 5:18 am

Has anyone run into a problem with the increments on their salinometer? My 0% and 10% saturation lines seem to be about 2 cm apart every time. Leaves hardly any room for the "in-between" increments.
Yeah, that happens. I would say just try your best to work with it.
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