Question

identify the type(s) of plate boundary that exists between the following plates:
a: north american plate and pacific plate: _______________
b: nazca plate and south american: _______________
c: philippine plate and pacific plate: _______________
d: indian - australian plate and african plate: _______________
e: arabian plate and african plate: _______________
f. which of the above plate boundaries has more than one kind of plate boundary? make a claim about what natural events people living near these boundaries might experience, providing evidence and reasoning to support your claim.
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7: for each pair below, determine which plate is the subducting plate and which is the overriding plate:
a: nazca plate: __________ & south american plate: __________
b: philippine plate: __________ & pacific plate: __________
c: north american plate: __________ & cocos plate: __________
d: juan de fuca plate: __________ & north american plate: __________
8: identify a location where there is an uncertain plate boundary. ____________
9: identify a location where there is a major active fault zone. ____________
10: identify a location where there is a normal fault. ____________
11: which two plates are at the boundary of the mohns ridge?
__________ and __________
12: identify the name of the trench off the southern coast of alaska.
____________
13: on which plate are the hawaiian islands? ____________

Explanation:

Question 6 (Plate Boundary Types)

a. The North American and Pacific Plates slide past each other horizontally.
b. The Nazca Plate subducts under the South American Plate.
c. The Pacific Plate subducts under the Philippine Plate.
d. The Indian-Australian and African Plates move apart from each other.
e. The Arabian and African Plates move apart from each other.
f. The North American-Pacific boundary has transform and small divergent segments. Transform boundaries cause strike-slip earthquakes (e.g., 1906 San Francisco quake), while divergent segments create small seafloor spreading zones with minor seismic activity.

Question 7 (Subducting/Overriding Plates)

a. Denser oceanic Nazca Plate subducts under continental South American Plate.
b. Denser oceanic Pacific Plate subducts under oceanic Philippine Plate (older crust subducts).
c. Denser oceanic Cocos Plate subducts under continental North American Plate.
d. Denser oceanic Juan de Fuca Plate subducts under continental North American Plate.

Question 8 (Uncertain Plate Boundary)

The boundary between the African Plate and Somali Plate is not fully mapped, with unclear movement patterns.

Question 9 (Major Active Fault Zone)

The San Andreas Fault is a well-documented, highly active transform fault zone.

Question 10 (Normal Fault Location)

The Basin and Range Province has extensional tectonics creating normal faults.

Question 11 (Mohns Ridge Plates)

The Mohns Ridge is a mid-ocean ridge where these two plates diverge.

Question 12 (Alaskan Trench)

This trench forms where the Pacific Plate subducts under the North American Plate off southern Alaska.

Question 13 (Hawaiian Islands Plate)

The Hawaiian hot spot is stationary under this moving oceanic plate, forming the island chain.

Answer:

6.
a: Transform boundary
b: Convergent (oceanic-continental) boundary
c: Convergent (oceanic-oceanic) boundary
d: Divergent boundary
e: Divergent boundary
f: North American Plate and Pacific Plate boundary. Claim: People near this boundary experience frequent strike-slip earthquakes and rare small volcanic eruptions. Evidence: The San Andreas Fault (part of this boundary) caused the 1906 San Francisco magnitude 7.9 earthquake; small divergent segments near the Gulf of California produce minor volcanic activity. Reasoning: Transform motion builds up stress that releases as earthquakes, while small divergent zones allow magma to reach the surface.

7.
a: Nazca Plate: Subducting plate & South American Plate: Overriding plate
b: Philippine Plate: Overriding plate & Pacific Plate: Subducting plate
c: North American Plate: Overriding plate & Cocos Plate: Subducting plate
d: Juan de Fuca Plate: Subducting plate & North American Plate: Overriding plate

1. Between the African Plate and Somali Plate (East Africa)

1. San Andreas Fault, California, USA

1. Basin and Range Province, Western USA

1. North American Plate and Eurasian Plate

1. Aleutian Trench

1. Pacific Plate