Plate Tectonics Test

Front 1

3 main layers of the Earth? Summarize each.

Back 1

Crust-5 to 40km thick & 2 types: Oceanic and Continental
Mantle: Contains lithosphere and asthenoshere: rest solid
Core: Outer core and inner core, temps up to 5000 degrees C.

Front 2

Relationships between layers.

Back 2

1. Temperature rises as you get lower.
2. Pressure increases as you get lower
3. Inner core is solid even though the temp and pressure is higher cuase the material must expand to beocme liquid.

Front 3

Difference between both crust types.

Back 3

Continental-less dense, thicker, made of alumunium and silicon (granite)
Oceanic-more dense, thinner, amde of iron and magnesium (basaltic)

Front 4

8 Most Common Elements

Back 4

Oxygen, Silicon, Aluminium, Iron, Calcium, Sodium, Potassium, Magnesium

Front 5

Lithosphere and Asthenosphere

Back 5

Lithosphere-The crust and uppermost part of the mantle that is similar ot the crust. 100km thick. forms plates that move.
Asthenosphere-Soft flowing material; convection, moves plates

Front 6

Inner Core and Outer Core

Back 6

Inner Core-SOlid Materail made of iron and nickel
outer Core-Molten material made form iron and nickel

Front 7

Theory of Continental Drift
A. Who?
B. Evidence?
C. Why was it only a theory?

Back 7

A. ALfred Wegner
B. landforms: mountains, fossils, glacial deposits and striations.
C. No proof of how plates moved

Front 8

How was sea-floor spreadying mapped?

Back 8

Sonar and radar during the Cold War

Front 9

Wat was found in the sea-floor spreading mapping?

Back 9

Mid-Ocean ridges

Front 10

Sea-Floor SPreading
A. Who?
B.Evidence?
C. Subduction and Deep Ocean Trenches

Back 10

A. Henry Hess
B.mid-ocean ridge, pillows, magnetic stripes, drilling samples
C. process by which convection in the astenosphere cause the paltes to sunk beneath th e deep ocean rench and back into the mantle

Front 11

Magnetic stripes on floor, why?

Back 11

Axis turns-poles change-magnetic stripes are changed

Front 12

Theory of Plate Tectonics
A. What is it?
B. What are plates?

Back 12

A. States that pieces of the Earth's lithosphere in a slow constant motion, drivne by convection.

Front 13

Three types of plate boundaries?

Back 13

Transform, Divergent, Convergent

Front 14

Transform
A. What is it?
B. Effect?

Back 14

A.plates slide past eachither causing earthquakes
B.San Andreas Fault

Front 15

Divergent
A. What is it?
B. Effect?

Back 15

A.Paltes move away from eachother forming new crust
B.Mid-ocean Ridge, on land-rift valley

Front 16

Types of COnvergent BOundaries

Back 16

Oceanic-Oceanic Continental-Continental Oceanic-Continental

Front 17

Oceanic-Oceanic

Back 17

in the subduction zone there is a trench where the older, more dense, subducts forming an island arc, ex. aleutian islands

Front 18

Continental-Continental

Back 18

Both plates are the same density so neither subducts cauing tall mtn. ranges. ex. Himalayas

Front 19

Oceanic-Continental

Back 19

Oceanic crust always subducts under a continental crust forming a trench and volcanic arc ex. Andes mtns.