Dynamic Planet (Oceanography)

Test your knowledge of various Science Olympiad events.
Umaroth
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Re: Dynamic Planet (Oceanography)

Post by Umaroth » October 14th, 2019, 9:08 am

Giantpants wrote:
September 13th, 2019, 11:46 am
SciolyMaster wrote:
September 13th, 2019, 9:08 am
1. What is a guyot? How does one form?

2. Describe the three stages of atoll formation. Who first proposed this theory?

3. If a deep-water wave with a wavelength of 12 m is moving at a speed of 50 m/s in 2500 m deep water, what is its period?

4. For the wave in question 3, what is the maximum amplitude it can have before it breaks, assuming it remains in deep water?
1. It’s like a flattopped seamount, which formed by erosion of a seamount (formed by volcanism) to have a flat top
2. Atolls are formed by
A. Volcanism forming an island
B. Erosion of the island and formation of a fringing reef, and it lowers in elevation
C. Complete submersion and the island is now a lagoon, oh and also formation of a barrier reef
I feel like I had on my old notes that Darwin came up with it lol
3. 2.77 s, I used the formula wavelength = (g*T^2)/2pi, so if I messed up somewhere lmk lol
4. I’m not so sure abt this one, wouldn’t it just break when it touched the bottom, so like, 2500 m?
Worth a shot lol
Since nobody has confirmed these, I guess I will.

All look correct except #4. The answer for that one is 0.857 m, or 6/7 meters. The ratio of wave height to wavelength cannot exceed 1:7 without breaking, so max wave height is 12/7 m, and amplitude is half of wave height, so it would be 6/7 m. I'll ask some now:
1. What kind of data is a Nansen bottle used to collect?
2. What new tool has replaced the Nansen bottle for collection purposes?
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BennyTheJett
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Re: Dynamic Planet (Oceanography)

Post by BennyTheJett » October 14th, 2019, 9:56 am

I think that this is what you're looking for....
Answer: Temperature at specific depths. The Nansen bottle was replaced by the Niskin bottle. Question: Who were the scientists credited with creating the theory of Magnetic Reversals? When was the last magnetic reversal?

***EDIT**** Someone should make a notesheet of all the common equations used for this event and hit everyone on the forums up. It'd be soooooo nice. :idea:
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Re: Dynamic Planet (Oceanography)

Post by jimmy-bond » October 23rd, 2019, 8:08 pm

BennyTheJett wrote:
October 14th, 2019, 9:56 am
I think that this is what you're looking for....
Answer: Temperature at specific depths. The Nansen bottle was replaced by the Niskin bottle. Question: Who were the scientists credited with creating the theory of Magnetic Reversals? When was the last magnetic reversal?

***EDIT**** Someone should make a notesheet of all the common equations used for this event and hit everyone on the forums up. It'd be soooooo nice. :idea:
No clue as to who came up with the theory, so I'm just gonna say Harry Hess. Last reversal occurred around 750k ya.
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Re: Dynamic Planet (Oceanography)

Post by BennyTheJett » October 24th, 2019, 5:31 am

Indeed, sorry for the poorly worded question. Your turn.
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Re: Dynamic Planet (Oceanography)

Post by jimmy-bond » November 2nd, 2019, 12:33 pm

1. Back-arc basins are found at what type of plate boundary? Be specific.

2. Under what conditions will a proxigean spring tide occur?

3. The following picture shows what coastal feature? (the strip connecting the two areas of land)
Image
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Re: Dynamic Planet (Oceanography)

Post by JoeyC » November 2nd, 2019, 12:53 pm

1. Convergent, between 2 oceanic crusts.
2. When the Moon is unusually close to the Earth and in its New Moon phase.
3. Tombolo
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Re: Dynamic Planet (Oceanography)

Post by jimmy-bond » November 2nd, 2019, 1:10 pm

JoeyC wrote:
November 2nd, 2019, 12:53 pm
1. Convergent, between 2 oceanic crusts.
2. When the Moon is unusually close to the Earth and in its New Moon phase.
3. Tombolo
Correct except I believe 1 is a oceanic-continental convergent boundary. Your turn!
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Re: Dynamic Planet (Oceanography)

Post by BennyTheJett » November 15th, 2019, 6:43 am

Welp, since this died I guess I'll revive it.

What is a mixed tide? How is that different than a semidiurnal tide?
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Re: Dynamic Planet (Oceanography)

Post by Giantpants » November 18th, 2019, 6:41 am

BennyTheJett wrote:
November 15th, 2019, 6:43 am
Welp, since this died I guess I'll revive it.

What is a mixed tide? How is that different than a semidiurnal tide?
So I think a mixed tide is two unequal high and unequal low peaks a day, whereas semidiurnal tide is two relatively equal peaks of high and two relatively equal low peaks per day?
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Re: Dynamic Planet (Oceanography)

Post by BennyTheJett » November 18th, 2019, 6:45 am

Correct. Your Turn!
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