low velocity - 2025 NAFTA

Packet 8: Bonus 7

Morgan and Wilson discovered two large “provinces” under the African and Pacific plates named for displaying this characteristic. For 10 points each:

[10m] What characteristic do seismic waves at “ultra zones” in the D'' (“D-double prime”) layer exhibit as they approach the core-mantle boundary?

ANSWER: low velocity [or low shear velocity or low friction velocity; accept equivalents such as reduced velocity or slow velocity or slowed down or slowing down; accept large low shear velocity provinces or LLSVPs]

[10e] LLSVPs may have formed along with mantle plumes, which underlie these regions of increased volcanism that are responsible for the Hawaiian islands forming.

ANSWER: hotspots

[10h] The prevailing theory of LLSVP formation is that they are accumulations of subducted ocean slabs, supported by a maximum isotopic ratio of this element and strontium called the DUPAL anomaly. Ocean island basalts are primarily classified with strontium, neodymium, and this element.

ANSWER: lead [or Pb]

<MS, Other Science (Earth Science)> | NAFTA-Packet-8

Heard	PPB	E %	M %	H %
33	12.12	97%	24%	0%

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Conversion

Team	Opponent	Part 1	Part 2	Total	Parts
1000000 Delinquents	(give me an) ANSWER: die for baseball	10	10	20	ME
A Neg of Beauty is a Joy Forever	H Charlson's Washed Up Scrubs	0	10	10	E
Abbas I founded the Abbasids	UBC B	0	10	10	E
Ana Pauker? I hardly know her!	The Umayyad Caliphate be like REPEAL NAPHTHA	10	10	20	ME
Berkeley A	Stanford B	10	10	20	ME
Berkeley B	Team 7	0	10	10	E
Chicago !A	In the Mood for Transportation Equipment	0	10	10	E
Constans Constantius and Constantine Jr.	Stanford A	0	10	10	E
Copán Seethe	It's something unpredictable/that in the end is right/please refrain from e-mailing my wife	0	10	10	E
Dielectrical Materialism	Vacuous Tortoise	0	10	10	E
Dour Straits	C R A B S	0	10	10	E
Execute Order 6 7	BHSU	10	10	20	ME
Girls who Just Want to Have Fun + Liam	Tennessee A	0	10	10	E
Habitat 67	Noah Sheidlower	10	10	20	ME
Indiana	Muscle Mass Extinction Event	0	10	10	E
Lex	WashU	10	10	20	ME
Maybe Ever	The Worst Trade Deal in the History of Trade Deals	0	10	10	E
NYU A	Untitled Keyal Team	0	10	10	E
NYU B or not NYU B (that is the question)	The "C" Team	0	0	0
No Country for Old Quizzers	The Third Time when she was Given to Answer the Hard and the Easy, and Answered Only the Easy	0	10	10	E
Not Old! (Old)	Team 8	0	10	10	E
Polish Orthographers Posting Their Łs	David Foster Gromit	0	10	10	E
Quebecois Olga Tokarczuk be like 'freins de jacob interdits'	Northwestern	0	10	10	E
Say It Ain't Zhou	Georgia Tech 𓂈𓆉𓃡	0	10	10	E
Shipping Down from Ballston	Six Quizbowlers in Search of Owen Minmo	10	10	20	ME
St. Marx	[Redacted]	0	10	10	E
Surrealist Subcommandante Marcos be like Esto no es una pipa	Capital One in the Twenty-First Century	10	10	20	ME
The Saint-Straw that Broke the Camille's Back	Middlesex County Fetty Wap Fan Club	0	10	10	E
The tram is not in service; please use the moving walkway.	Invective Against Swans	0	10	10	E
UBC A	The Unbearable Heaviness of History Players	0	10	10	E
Untitled by Alexander McQueen by Premeditated Chaos by Alexander McQueen by Percival Everett	Negged Five Times in a Yellow Cab Against the Gottis and Gambinos	0	10	10	E
consumption smoothing by borrowing future big law income	The Fire Neg Time	0	10	10	E
four high school generalists shock natives with fluent stock in Tocharian B	W&L+Friend	0	10	10	E

Summary

Tournament	Edition	Match	Heard	PPB	E %	M %	H %
2026 NAFTA at Stanford	01/17/2026	✓	4	12.50	100%	25%	0%
2026 NAFTA at UBC	01/17/2026	✓	2	10.00	100%	0%	0%
2025 NAFTA Online	02/14/2026	✓	4	12.50	100%	25%	0%
2026 NAFTA at Vanderbilt	02/14/2026	✓	3	13.33	100%	33%	0%
2025 NAFTA at Toronto	09/13/2025	✕	5	8.00	80%	0%	0%
2025 NAFTA at Maryland	09/27/2025	✕	5	12.00	100%	20%	0%
2025 NAFTA at Harvard	10/04/2025	✓	3	13.33	100%	33%	0%
2025 NAFTA at Oxford	10/11/2025	✓	4	10.00	100%	0%	0%
2025 NAFTA at Chicago	11/08/2025	✓	6	13.33	100%	33%	0%
2025 NAFTA at Columbia	11/08/2025	✓	5	12.00	80%	40%	0%
2025 NAFTA at Richmond	12/20/2025	✓	2	10.00	100%	0%	0%