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KCCT Plate Tectonic Study Guide for Science Test
Pangaea is: One large land mass (before continents drifted apart)
Mid- Ocean Ridges: The location where sea-floor spreading occurs
List evidence of Continental Drift: Fossils: Same kind found in two different locations.
Earthquakes occur where most often: Transform Boundaries
Why do we not notice Continental Drift: They only drift one to four centimeters per year so we will not
observe through our life.
200 Million Years Ago
135 Million Years Ago
65 Million Years Ago
Today
Role of Earth’s core in causing Magnetic Fields: It is made mostly of iron in both solid and liquid forms
Layers of the Earth: Crust, Mantle, Outer Core, Inner Core
Explain Subduction: Hot rock from deep within the Earth rises and cooler rock near the surface sinks
Mid-ocean ridges create new land when: Sea-floor spreading happens and causes magma to rise to the surface
The tectonic plates move on which layer: Asthenosphere
The Subduction Zone is: where layers of the earth are recycled
Why does the oceanic lithosphere sink beneath the continental lithosphere at convergent boundaries?
It is denser.
The THREE types of boundaries are:
1. Divergent – 2 plates move apart
2. Convergent – 2 plates collide
3. Transform – 2 plates slide past each other
Real-life catastrophes that occur by plate boundaries:
1. Tsunami in Indonesia – occur at transform boundaries between Earth’s tectonic plates and cause the
water above to be moved up or down.
2. Earthquake in Japan – happens when sudden shifting of rock below the Earth’s surface occurs at
transform boundaries
Landforms that take longer than a lifetime to form:
1. Mountains – formed at convergent boundaries when 2 plates collide
2. Volcanoes – formed at convergent boundaries when 2 plates collide