Dynamic Planet B/C

knottingpurple
Member
Member
Posts: 212
Joined: April 10th, 2016, 5:44 am
Division: Grad
State: NJ
Location: Oxford, UK
Contact:

Re: Dynamic Planet B/C

Postby knottingpurple » March 4th, 2018, 7:23 pm

Ethancheese123 wrote:Thanks, also, do we need to know different type of rocks?


The level of knowledge you need about rocks I think varies from test to test, there was definitely an invite t test I saw last year which provided an image of a rock and asked us to ID it for DP, but most of the time that stuff stays in R&M and the most we have to know is what general types of rocks occur within different parts of the crust - knowing the difference between basaltic and granitic, for instance, is often pretty useful, but it's not really the main focus of the event.
"She was determined to drop his acquaintance immediately, and she was very thankful that she had never been acquainted with him at all... she hated him so much that she was resolved never to mention his name again, and she should tell everybody she saw, how good-for-nothing he was."

User avatar
Tailsfan101
Exalted Member
Exalted Member
Posts: 532
Joined: April 14th, 2017, 4:33 pm
Division: B
State: ID
Location: Somewhere off studying
Contact:

Re: Dynamic Planet B/C

Postby Tailsfan101 » March 5th, 2018, 8:57 am

knottingpurple wrote:
Ethancheese123 wrote:Thanks, also, do we need to know different type of rocks?


The level of knowledge you need about rocks I think varies from test to test, there was definitely an invite t test I saw last year which provided an image of a rock and asked us to ID it for DP, but most of the time that stuff stays in R&M and the most we have to know is what general types of rocks occur within different parts of the crust - knowing the difference between basaltic and granitic, for instance, is often pretty useful, but it's not really the main focus of the event.

Agreeing with knottingpurple here, most tests generally just ask you to know where you can find different types of rocks, I wouldn't expect most tests to ask a question about a specific rock. Of course, the topic this year is Tectonics, and I don't see how that applies that much to rocks.
2019 Treasure Valley Homeschool Wiki (Division B)
2018
State/Nats
Crime: 1/35
Road: 1/44
DD: 2/37
MM: 3/46

2017
State/Nats
DD: 1/16
DP: -/50
Road: 2/51
FF: 4/59

2019 events: Road Scholar, Crime Busters, Disease Detectives, Heredity
Assassinator for game #118

User avatar
UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1052
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA
Location: (0, 0)
Contact:

Re: Dynamic Planet B/C

Postby UTF-8 U+6211 U+662F » March 8th, 2018, 5:31 pm

Tailsfan101 wrote:
knottingpurple wrote:
Ethancheese123 wrote:Thanks, also, do we need to know different type of rocks?


The level of knowledge you need about rocks I think varies from test to test, there was definitely an invite t test I saw last year which provided an image of a rock and asked us to ID it for DP, but most of the time that stuff stays in R&M and the most we have to know is what general types of rocks occur within different parts of the crust - knowing the difference between basaltic and granitic, for instance, is often pretty useful, but it's not really the main focus of the event.

Agreeing with knottingpurple here, most tests generally just ask you to know where you can find different types of rocks, I wouldn't expect most tests to ask a question about a specific rock. Of course, the topic this year is Tectonics, and I don't see how that applies that much to rocks.

Tectonics -> Magma -> Extrusive and intrusive rocks ?

In my eyes, questions about where certain igneous rocks form are fair game, but ID questions are really out there.

matematika
Member
Member
Posts: 62
Joined: October 26th, 2017, 7:56 pm
Division: B
State: NY
Contact:

Re: Dynamic Planet B/C

Postby matematika » March 28th, 2018, 6:01 am

Are there any topics that could possibly be tested that are not explicitly stated in the rules? I find that major plate tectonic movements are often tested, but not mentioned in the rules.
2017 - Herpetology, Dynamic Planet, Solar System

User avatar
UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1052
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA
Location: (0, 0)
Contact:

Re: Dynamic Planet B/C

Postby UTF-8 U+6211 U+662F » March 28th, 2018, 6:37 am

matematika wrote:Are there any topics that could possibly be tested that are not explicitly stated in the rules? I find that major plate tectonic movements are often tested, but not mentioned in the rules.

Things like volcanoes, intrusive/extrusive rock, stratigraphy, etc.

User avatar
Tailsfan101
Exalted Member
Exalted Member
Posts: 532
Joined: April 14th, 2017, 4:33 pm
Division: B
State: ID
Location: Somewhere off studying
Contact:

Re: Dynamic Planet B/C

Postby Tailsfan101 » March 28th, 2018, 6:56 am

UTF-8 U+6211 U+662F wrote:
matematika wrote:Are there any topics that could possibly be tested that are not explicitly stated in the rules? I find that major plate tectonic movements are often tested, but not mentioned in the rules.

Things like volcanoes, intrusive/extrusive rock, stratigraphy, etc.

Also, the National test last year had us tracking the rate of a lava flow.
2019 Treasure Valley Homeschool Wiki (Division B)
2018
State/Nats
Crime: 1/35
Road: 1/44
DD: 2/37
MM: 3/46

2017
State/Nats
DD: 1/16
DP: -/50
Road: 2/51
FF: 4/59

2019 events: Road Scholar, Crime Busters, Disease Detectives, Heredity
Assassinator for game #118

knottingpurple
Member
Member
Posts: 212
Joined: April 10th, 2016, 5:44 am
Division: Grad
State: NJ
Location: Oxford, UK
Contact:

Re: Dynamic Planet B/C

Postby knottingpurple » March 28th, 2018, 5:06 pm

Tailsfan101 wrote:
UTF-8 U+6211 U+662F wrote:
matematika wrote:Are there any topics that could possibly be tested that are not explicitly stated in the rules? I find that major plate tectonic movements are often tested, but not mentioned in the rules.

Things like volcanoes, intrusive/extrusive rock, stratigraphy, etc.

Also, the National test last year had us tracking the rate of a lava flow.


The thing is that all of these topics are under the bigger umbrella topics listed, volcanoes are natural hazards, plate movements and impacts of plate movements or something is mentioned, you just have to read things that relate to the rules instead of just looking up the topics in the rules? It's not like they're unrelated?
"She was determined to drop his acquaintance immediately, and she was very thankful that she had never been acquainted with him at all... she hated him so much that she was resolved never to mention his name again, and she should tell everybody she saw, how good-for-nothing he was."

matematika
Member
Member
Posts: 62
Joined: October 26th, 2017, 7:56 pm
Division: B
State: NY
Contact:

Re: Dynamic Planet B/C

Postby matematika » April 1st, 2018, 11:14 am

For orogenies and supercontinents, I need some sort of big, general timeline with important events like (not accurate, obviously):

4 Ma - Pangaea
3.8 Ma - Taconic Orogeny (blah blah blah happens here)
3.7 Ma - Alleghanian Orogeny (blah blah blah happens here)
3 Ma - Pangaea rifts apart

Is there some online resource for this? How would I compile this huge timeline? Everything feels so messed up and not connected.
2017 - Herpetology, Dynamic Planet, Solar System

User avatar
UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1052
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA
Location: (0, 0)
Contact:

Re: Dynamic Planet B/C

Postby UTF-8 U+6211 U+662F » April 1st, 2018, 11:22 am

matematika wrote:For orogenies and supercontinents, I need some sort of big, general timeline with important events like (not accurate, obviously):

4 Ma - Pangaea
3.8 Ma - Taconic Orogeny (blah blah blah happens here)
3.7 Ma - Alleghanian Orogeny (blah blah blah happens here)
3 Ma - Pangaea rifts apart

Is there some online resource for this? How would I compile this huge timeline? Everything feels so messed up and not connected.

What I've been doing is basically looking up all the different supercontinents (Pangaea, Ur, Laurasia, Rodinia, etc.) and compiling the information, but there might be a better way.

matematika
Member
Member
Posts: 62
Joined: October 26th, 2017, 7:56 pm
Division: B
State: NY
Contact:

Re: Dynamic Planet B/C

Postby matematika » April 1st, 2018, 11:55 am

Yeah, I just printed out the eras/periods/epochs timeline, and just labeled it with the orogenies and supercontinents, with post-its for detailed notes.
2017 - Herpetology, Dynamic Planet, Solar System

matematika
Member
Member
Posts: 62
Joined: October 26th, 2017, 7:56 pm
Division: B
State: NY
Contact:

Re: Dynamic Planet B/C

Postby matematika » April 1st, 2018, 5:00 pm

When are gravity anomalies positive and when are they negative?
2017 - Herpetology, Dynamic Planet, Solar System

User avatar
Unome
Moderator
Moderator
Posts: 3617
Joined: January 26th, 2014, 12:48 pm
Division: Grad
State: GA
Location: somewhere in the sciolyverse
Contact:

Re: Dynamic Planet B/C

Postby Unome » April 1st, 2018, 5:03 pm

matematika wrote:When are gravity anomalies positive and when are they negative?

Consider the meaning of a gravity anomaly being positive or negative in the simplest sense. Now think of several different geologic features and determine whether their anomaly would be positive or negative. Make sure to account for corrections - typically, the most common interpretable anomaly is the Bouguer anomaly.
Userpage
Chattahoochee High School Class of 2018
Georgia Tech Class of 2022

Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.

matematika
Member
Member
Posts: 62
Joined: October 26th, 2017, 7:56 pm
Division: B
State: NY
Contact:

Re: Dynamic Planet B/C

Postby matematika » April 1st, 2018, 5:33 pm

Unome wrote:
matematika wrote:When are gravity anomalies positive and when are they negative?

Consider the meaning of a gravity anomaly being positive or negative in the simplest sense. Now think of several different geologic features and determine whether their anomaly would be positive or negative. Make sure to account for corrections - typically, the most common interpretable anomaly is the Bouguer anomaly.


I know the meaning of a gravity anomaly, but how do I relate that to landforms? I know that negative gravity anomalies relate to thick crusts, but then why aren't mountain ranges negative gravity anomalies?
2017 - Herpetology, Dynamic Planet, Solar System

knottingpurple
Member
Member
Posts: 212
Joined: April 10th, 2016, 5:44 am
Division: Grad
State: NJ
Location: Oxford, UK
Contact:

Re: Dynamic Planet B/C

Postby knottingpurple » April 1st, 2018, 6:00 pm

matematika wrote:
Unome wrote:
matematika wrote:When are gravity anomalies positive and when are they negative?

Consider the meaning of a gravity anomaly being positive or negative in the simplest sense. Now think of several different geologic features and determine whether their anomaly would be positive or negative. Make sure to account for corrections - typically, the most common interpretable anomaly is the Bouguer anomaly.


I know the meaning of a gravity anomaly, but how do I relate that to landforms? I know that negative gravity anomalies relate to thick crusts, but then why aren't mountain ranges negative gravity anomalies?


Gravity anomalies aren't so much affected by the thickness of crust as by the amount of mass (because, y'know, GMm/r^2 type of stuff). Yes, if you just add mass on top of an existing landform, making a thicker area of the same density, you should have more gravity, but that's not what happens with a mountain - isostasy means the mountain also has a deep extent into the mantle of less dense crustal material.

But honestly, I just spent a lot of time answering these questions based off a chart I found relating free air and bouger anomalies over different features, and kind of mindlessly copying, so idk.
"She was determined to drop his acquaintance immediately, and she was very thankful that she had never been acquainted with him at all... she hated him so much that she was resolved never to mention his name again, and she should tell everybody she saw, how good-for-nothing he was."

matematika
Member
Member
Posts: 62
Joined: October 26th, 2017, 7:56 pm
Division: B
State: NY
Contact:

Re: Dynamic Planet B/C

Postby matematika » April 1st, 2018, 8:22 pm

Thanks! What is the difference between free-air and Bouguer anomalies? How would you use a chart to generalize the sign of the anomaly at a certain geological feature? Free-air and Bouguer anomalies tend to be exact opposites of each other in the charts I've seen...which one to look at?
2017 - Herpetology, Dynamic Planet, Solar System


Return to “2018 Study Events”

Who is online

Users browsing this forum: No registered users and 3 guests