Collide, move apart, and slide

Question 1

Father of the plate tectonics theory

Answer 1

Alfred Wegener

Question 2

The continental crust
- density?
- thickness?
- primary composition?

Answer 2

• 2.7 g/cm^3
• 35-70 km
• Granite

Question 2

The brittle solid part of Earth.

Answer 2

Lithosphere

Question 3

A low-density, light-colored, coarse-grained, felsic igneous rock.

Answer 3

Granite

Question 4

A high-density, dark-colored, fine-grained, mafic, igneous rock.

Answer 4

Basalt

Question 5

The oceanic crust
- density?
- thickness?
- primary rock composition?

Answer 5

• 3.0 g/cm^3
• 7-10 km
• basalt

Question 6

When the internal driving force from Earth causes the surface to move, it results in _________________________________ such as earthquakes and volcanic activities.

Answer 6

different geologic phenomena

Question 7

It is a ductile layer under the solid lithosphere.

Answer 7

Asthenosphere

Question 8

It is primarily composed of rocks that are partly molten due to high temperature and pressure under the lithosphere.

Answer 8

Asthenosphere

Question 9

The movement of each tectonic plate is _____ and _______________ to one another.

Answer 9

slow, constant relative

Question 9

Each convection current is divided into ______ that move in the opposite direction.

Answer 9

cells

Question 10

3 types of plate margins

Answer 10

• Convergent
• Divergent
• Transform

Question 11

The plate boundaries where the plates move apart from each other, resulting in the production of a new seafloor.

Answer 11

Divergent plate boundaries

Question 12

Plate margins are also known as ________________.

Answer 12

plate boundaries

Question 13

Plate boundaries where the plate move toward each other.

Answer 13

Convergent plate boundaries

Question 14

3 types of collisions of two plates

Answer 14

• oceanic-continental
• oceanic-oceanic
• continental-continental

Question 15

The process at which the oceanic crust sinks down the continental crust and goes back to the mantle.

Answer 15

Subduction

Question 16

These chains of volcanoes parallel to the subduction zone are commonly called?

Answer 16

continental volcanic arcs

Question 17

Although in oceanic-oceanic convergence where both plates have the same average density, the one that subducts is usually the __________ plate.

Answer 17

older

Question 17

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

Answer 17

trench

Question 18

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

Answer 18

Transform plate boundary

Question 19

Mountain ranges underwater results from __________________.

Answer 19

Diverging plates

Question 19

Geologic activities in plate boundaries can be determined by the? (2)

Answer 19

• Type of plate boundary
• Type of crust found on each side of the boundary

Question 20

The edges where two plates meet.

Answer 20

Plate boundaries