Hwa Chong Institution (High School Section)
Humanities Department
Geography, Tectonics: Worksheet 3
Name: ____________________ (
)
Date: ________
Class : Sec 3 __
Transform Plate Boundaries (p92)
1. Describe the difference between divergent and transform plate boundaries.
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At divergent plate boundaries, plates move away from each other
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at transform plate boundaries, the plates slide past each other.
2. Read the article on Fig 2.22 (p 93) and study Fig 2.20.
Explain why Istanbul is prone to earthquakes.
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Istanbul is in danger because of its proximity to the North Anatolian Fault.
The fault is on a transform plate boundary between the Anatolian Plate and Eurasian
Plate.
As the Anatolian Plate and Eurasian Plate slide past each other,
tremendous stress builds up along the plate boundary.
A sudden movement of the plates releases this pressure and the shockwaves cause
earthquakes.
Moreover, earthquakes since the 1990s have been occurring further west along the
North Anatolian Fault towards Istanbul
3. Refer to Fig 2.25 (p 95) to answer this question.
a) Identify the type of plate boundary at the San Andreas Fault. Transform plate booundary
b) With the aid of an annotated sketch and an example, describe how earthquakes occur at
transform plate boundaries.
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The Pacific Plate and the North American Plate are
moving past each other along the San Andreas Fault.
As the plates move past each other, stress builds up from the movement.
Eventually the stress is released and this causes earthquakes.
Eg 1906 earthquake in San Francisco
Plate Boundaries:Summary
Complete the table below. Refer to p 84 – 93.
Type of Plate boundary
Divergent
Associated landforms
Oceanic ridges,
oceanic- oceanic
volcano
Divergent
Rift valley, volcanoes
continental - continental
Example
Mid-Atlantic Ridge
The Great Rift Valley
of East Africa,
Cascade Range
volcanoes
Convergent
Oceanic trenches,
Mariana Trench,
oceanic- oceanic
volcanoes,
Mount Etna,
island arc
Mariana
Islands
Convergent
Oceanic trenches,
Sunda Trench,
oceanic - continental
mountain ranges,
Barisan Mountains
volcano
Convergent
Mountain ranges (fold mountain)
Himalayas
Fault line (earthquakes)
North Anatolian Fault
continental - continental
Transform
San Andreas Fault