Plate tectonics Flashcards Preview

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Flashcards in Plate tectonics Deck (28)
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1
Q

Earth’s lithosphere is composed of fragments or plates that move around and interact with one another.

A

Plate tectonics theory

2
Q

Supercontinent

A

Pangaea

3
Q

Father of the plate tectonics theory

A

Alfred Wegener

4
Q
  • Outermost layer of the earth
  • Composed of upper mantle and crust
A

Lithosphere

5
Q

Continental crust

A

thicker and less dense

6
Q

Thinner and more dense

A

Oceanic crust

7
Q

Made of various types of rocks and sediments floating on top of the malleable upper mantle

A

crust

8
Q

Two types of Earth’s crust

A

Continental crust and Oceanic crust

9
Q

Lithosphere is divided into fragments known as

A

Plates

10
Q

Surface waves

A

long surface waves and Rayleigh waves

11
Q

Method used to find an Earthquake’s epicenter

A

triangulation method

12
Q

Earthquake centers and volcano locations are distributed along the

A

plate margins

13
Q

Most volcano arcs found in the

A

Pacific ring of fire

14
Q

Year Plate tectonic theory was made

A

1915

15
Q
  • Under the lithosphere
  • A ductile layer
  • Composed of partly molten rocks due to high temperature
A

asthenosphere

16
Q

Movement of Plates

A

Slow and constant motion

17
Q

Plate margins known as

A

Plate boundaries

18
Q

Three types of Plate boundaries

A
  • Convergent
  • Divergent
  • Transform
19
Q

A deep, narrow depression on the ocean seafloor caused by the collision and/or subduction of plates.

A

Trench

20
Q

Tectonic plate forces (2)

A
  • Resisting force
  • Driving forces
21
Q
  • Plates move toward each other
  • Collision of two plates
A

Convergent plate boundaries

22
Q

Plates move apart from each other

A

Divergent plate boundaries

23
Q

Process of oceanic crust sinks down the continental crust and goes back to the mantle

A

Subduction

24
Q

Types of convergent boundaries:

A
  • Oceanic continental crust
  • Oceanic oceanic crust
  • Continental continental crust
25
Q

Forms Islands

A

Oceanic- oceanic crust

26
Q

Forms mountains

A

Continental- continental crust

27
Q

Forms Volcanoes

A

Oceanic- continental crust

28
Q

Two plates slide past horizontally to each other without destroying the lithospheric plate

A

Transform plate boundary