Plate Tectonics Theory

Question 1

(1965) was a Canadian scientist that proposed the lithosphere is broken into ?

combined ? ? ?single scientific theory.

Answer 1

J. Tuzo Wilson plates.

continental drift, sea-floor spreading and Earth’s tectonic plates

Question 2

What is theory of plate tectonics?

Answer 2

Movement of the Earth’s lithosphere as they slide slowly over the asthenosphere creates changes on Earth’s surface.

Question 3

What cause tectonics plates?

Answer 3

Convection currents:

cause plates to move, producing changes on Earth’s surface

Question 4

The edges of the plates meet at ?, changing Earth’s surface slowly.
When rocks slip past each other along?, faults in crust occur.

Answer 4

plate boundaries, boundaries

Question 5

Convergent Boundary

Answer 5

Convergent Boundary

Place where two plates come together, causing a collision. Crust is subducted

Question 6

Deep Ocean trench:
These are formed when two plates of ? crust collide.
Or when an ? plate collides with ?l plate, ? plate is subducted

Answer 6

oceanic crust oceanic plate continental plate, oceanic plate

Question 7

Mountains

These are formed when two ? plates collide.

Answer 7

continental

Question 8

Volcanoes
Subduction at the ?, forces the crust ?ward, it melts, and this magma rises to the surface, forming volcanoes.

? can form as well.

Answer 8

plate, downward, it melts, and this magma rises to the surface, forming volcanoes.

Earthquakes

Question 9

Transform boundaries-

Answer 9

two plates moving in opposite directions. Crust is not created or subducted creates: Earthquakes. No magma involved

Question 10

Divergent boundaries

Answer 10

Two plates move apart occur at the mid-ocean ridge. Crust is created !

rift valley – deep valley is formed along a divergent boundary on land
Mid-ocean ridges –oceanic crust to spread allowing hot rock to rise creating underwater mountains.
-Seafloor spreading occurs at these boundaries