Layers of the Earth

Question 1

• outermost layer of the earth
• 6-45 km thick

Answer 1

crust

Question 2

• boundary between crust and mantle
• 700 km thick

Answer 2

mohorovicic discontinuity

Question 3

• central part of the earth
• rich in sulfur and iron

Answer 3

core

Question 4

• 6 km thick
• made of basalt

Answer 4

oceanic crust

Question 5

• solid part of the core
• 1220 km thick

Answer 5

inner core

Question 6

• 84% of the earth’s volume
• rich in peridotite (rock)

Answer 6

mantle

Question 7

• boundary between inner and outer core

Answer 7

lehmann discontinuity

Question 8

• 30-40 km thick, made of graphite/andesite and basalt

Answer 8

continental crust

Question 9

• only liquid layer of the earth
• 2550 km thick
• responsible for earth’s magnetic field

Answer 9

outer core

Question 10

• boundary between lower mantle and upper core

Answer 10

guternberg discontinuity

Question 11

True or False

The earth is divided into several plates that move and collide with each other.

Answer 11

True

Question 12

True or False

The earth is divided into several plates that move and collide with each other.

Answer 12

True

Question 13

A fault that has moved once or more times in the last 10,000 years

Answer 13

Active Fault

Question 14

A fault that has moved once or more times in the last 10,000 years

Answer 14

Active Fault

Question 15

It is a line on the earth’s surface that is caused by the fault plane

Answer 15

Fault Trace

Question 16

A type of fault in which the hanging wall moves down and the force is pulling apart

Answer 16

Normal Fault

Question 17

• a fracture or crack
• usually found in tectonic plate boundaries

Answer 17

Fault

Question 18

True or False

Movement along fault planes generate earthquakes

Answer 18

False

Movement along [fault lines] generate earthquakes

Question 19

A fault that has not moved for millions of years

Answer 19

Inactive Fault

Question 20

A type of fault in which the movement is horizontal or sideways and is also known as transcurrent fault.

Answer 20

Strike-Slip Fault

Question 21

• flat surface where the movement occurs
• may be vertical or sloping

Answer 21

Fault Plane

Question 22

Found under fault plane

Answer 22

Footwall

Question 23

A type of fault in which the hanging wall moves up and the force is pushing together.

Answer 23

Reverse Fault

Question 24

A type of fault in which the hanging wall moves up and the force is pushing together.

Answer 24

Reverse Fault

Question 25

Found above the fault plane

Answer 25

Hanging Wall