grade 8 science quiz 4.2
Terms
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- Theory of Plate Tectonics
- describes continental movement but also proproses a possible explanation of why and how continents move
- Tektonikos means what
- Construction
- Tectonics
- study of the formation of features in the earth's crust
- What are 2 types of crust
- oceanic and continental
- lithosphere
- solid relatively rigid outer shell of the earth
- asthenosphere
- layer of plastic rock
- what is the breakdown of the number of lithophere plates
- 7 major, 13 minor
- 3 types of plate boundaries
- divergent, convergent, and transform fault
- divergent boundary
- it occrs when 2 plates move away from each other
- rift or rift valley
- narrow valley formed as plates separate in teh center of a mid-ocean ridge
- african and arabian
- 2 plates that formed the red sea
- convergent boundary
- direct collision of one plate with another plate
- subduction zone
- region a long a plate boundary, where one plate is forced under another plate
- convergent
- himalaya mountains were formed by this type of boundary
- island arc
- chain of volcanic islands
- california
- where the san andreas' fault is located
- convection
- the transfer of heat through the movement of heated fluid material
- convection currents
- cycle of warm water risin and and cool water sinking
- bubbles
- is the visible evidence of convection in a pot of boiling water
- heat from the earth's core and mantle causes some material in the asthenosphere to become _______ and therefore _______
- hotter; less dense
- ocean floor
- evidence for the existence of convection currents in teh asthenosphere comes from recent studies of what
- 200
- how many terranes form alska to the baja
- 25
- the terranes from alska to baja california increase the continent by what %
- terranes
- pieces of land, with its own geologic history
- 3 identifying characteristics of a terrane
- rocks and fossils, major faults at boundaries, and magnetic properties
- coral atolls
- ocean islands of coral
- coral
- skeletons of sea organisms
- limestone
- what minteral is permanette made of
- as hot magma ____ and _______, it carries the lithosphereic plates
- rises and cools
- mountains that contain rocks and fossils that once lived in the ocean, must had gotten there by terranes scraped off the ______
- ocean floor