Dynamic Planet B/C

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Re: Dynamic Planet B/C

Postby Justin72835 » November 9th, 2018, 8:12 am

TheThunder wrote:Ok! Hi!
So, I am in division B, and the theme for this year is glaciers.
Any advice on Dynamic Planet?
What years in the past have had the theme of glaciers?

Thanks!
-Thunder

Adi1008 wrote:Dynamic Planet B/C: Students will use process skills to complete tasks related to glaciers, glaciation and long-term climate change.

Dynamic Planet Wiki

Dynamic Planet Test Exchange 2018

Past Threads: 2013 (Glaciers), 2014 (Glaciers), 2015 (Oceanography), 2016 (Oceanography), 2017 (Tectonics), 2018 (Tectonics)

Past Question Marathons: 2014, 2015, 2016, 2017 2018

The first post of this thread is a very good place to start if you're just beginning. Good luck!
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Re: Dynamic Planet B/C

Postby SciolyHarsh » November 15th, 2018, 4:27 pm

Hey guys, so I'm stuck on a question for a practice test, and I don't understand why the answer is wrong.

What do ice cores preserve that allow us to understand more about past climates?

a) They show the granular composition of the snow at the time, which shows the terrestrial elements most prevalent during that period
b) They capture debris that reflects the sedimentary elements on the surface at the time
c) They capture atmospheric air when they are formed, reflecting the air quality at the time
d) Their radioactivity makes it easy to capture information on the history of the ice core.

My answer was c, but the correct answer is d. Could you guys explain why?

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Re: Dynamic Planet B/C

Postby UTF-8 U+6211 U+662F » November 15th, 2018, 4:39 pm

SciolyHarsh wrote:Hey guys, so I'm stuck on a question for a practice test, and I don't understand why the answer is wrong.

What do ice cores preserve that allow us to understand more about past climates?

a) They show the granular composition of the snow at the time, which shows the terrestrial elements most prevalent during that period
b) They capture debris that reflects the sedimentary elements on the surface at the time
c) They capture atmospheric air when they are formed, reflecting the air quality at the time
d) Their radioactivity makes it easy to capture information on the history of the ice core.

My answer was c, but the correct answer is d. Could you guys explain why?

I don't do glaciers, but I really doubt it's d. The key is probably mistaken.

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Re: Dynamic Planet B/C

Postby OrigamiPlanet » November 16th, 2018, 12:43 pm

SciolyHarsh wrote:Hey guys, so I'm stuck on a question for a practice test, and I don't understand why the answer is wrong.

What do ice cores preserve that allow us to understand more about past climates?

a) They show the granular composition of the snow at the time, which shows the terrestrial elements most prevalent during that period
b) They capture debris that reflects the sedimentary elements on the surface at the time
c) They capture atmospheric air when they are formed, reflecting the air quality at the time
d) Their radioactivity makes it easy to capture information on the history of the ice core.

My answer was c, but the correct answer is d. Could you guys explain why?


They definitely have atmospheric air of that time period, but what we are truly focusing on is I believe the O-18 to O-16 ratios. Since O-18 is an unstable isotope (the neutron:proton ratio is greater than 1, so it is unstable and thus radioactive for a quick explanation), it does undergo decay over a period of time, and that's why it would say that it is radioactivity. Over time the O-18 will experience numerous half-lives, and we essentially use the half-life data to calculate the age and history of the ice core. We aren't really looking into the composition of air directly, we look more for just those specific oxygen isotopes to understand this. Correct me if I am wrong, but I believe that's why it is d).
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Re: Dynamic Planet B/C

Postby OrigamiPlanet » November 16th, 2018, 12:46 pm

So my partner and I are both stuck on one of the topics that is going to be addressed for part j. with the sedimentary sequences. What exactly are we looking for and then what does it mean when the sediments are involved in place on land and on sea?
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Re: Dynamic Planet B/C

Postby SciolyHarsh » November 18th, 2018, 10:09 am

OrigamiPlanet wrote:So my partner and I are both stuck on one of the topics that is going to be addressed for part j. with the sedimentary sequences. What exactly are we looking for and then what does it mean when the sediments are involved in place on land and on sea?


So I searched up the phrase and this is what I got:
"Sedimentary sequences are layers of rock which are derived from weathered rocks, biogenic (= of living organisms) activity, or precipitation from solution."


I believe this refers to depositional sediment and layers of them, but I'm not sure about this.

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Re: Dynamic Planet B/C

Postby goodgra1 » November 27th, 2018, 4:58 pm

What kind of calculations do we have to do? Like what kind of math should we know for DP?

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Re: Dynamic Planet B/C

Postby l0lit » November 27th, 2018, 8:49 pm

goodgra1 wrote:What kind of calculations do we have to do? Like what kind of math should we know for DP?


The main question I've seen in tests is isostasy, which well covered in last year's dynamic. You would most likely be doing an Airy model, which is fairly simple. More about it here. Just set the before/after scenarios equal and solve.

Another one is mass balance, but that it simple. It is just net gain = mass accumulated - mass ablated.
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Re: Dynamic Planet B/C

Postby goodgra1 » November 28th, 2018, 7:28 am

Thanks

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Re: Dynamic Planet B/C

Postby PikaPikaChu » November 28th, 2018, 2:39 pm

goodgra1 wrote:What kind of calculations do we have to do? Like what kind of math should we know for DP?


I'll be honest, I've seldom seen any math come up at all on DP tests. The most was probably 1-2 questions about isostasy. Honestly, I wouldn't waste your time going too in depth in your notes about equations (my partner and I made that mistake last year). Just know your vocab and you should be good! (:
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Re: Dynamic Planet B/C

Postby PikaPikaChu » December 2nd, 2018, 11:42 am

Just had an invite where the DP test was more like a Geomaps test and there were stimulus questions. They had you read a passage and then answer questions based on the passage. :-|
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Re: Dynamic Planet B/C

Postby ajjepp » December 7th, 2018, 1:04 pm

Hi guys I'm in dynamic planet. I'm interested in glaciers and right now I'm working on the vocabulary. It's very important :)

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Re: Dynamic Planet B/C

Postby neerja.shah » December 9th, 2018, 6:16 am

So I am in this topic and need to learn it in about 2 months. How much information is there to cover? Where should I start on the Sci Oly page? What topic?

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Re: Dynamic Planet B/C

Postby l0lit » December 12th, 2018, 9:04 pm

neerja.shah wrote:So I am in this topic and need to learn it in about 2 months. How much information is there to cover? Where should I start on the Sci Oly page? What topic?


SciOly wiki is here, but your best bet is to also go to the Wikipedia glaciers page here. Get as many terms as you can and begin taking tests to find out what you don't know. I personally wouldn't read a textbook, but it can give you a lot of general knowledge as well as fill in gaps in your notes.
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Re: Dynamic Planet B/C

Postby Pastaman202 » December 16th, 2018, 5:35 am

Does anyone know what topic is mainly focused on this year? (Glacial landforms, topos, history, milankovitch cycles etc.)
2018 events: Wright stuff, Potions, Hover, Herps

2019 events: ELG, Herps, DP, Potions, Circuit, Density

I/I/I/I/R/S/N
ELG: 6/-/-/-/-/-/-
potions: 1/-/-/-/-/-/-
Circuit: 1/-/-/-/-/-/-
DP: 2/-/-/-/-/-/-
Herps: -/-/-/-/-/-/-
Density: -/-/-/-/-/-/-


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