Guided Notes: Plate Boundaries
Review:Theory
of Plate________________: Earth’s lithosphere consists of rigid, but
___________ masses called tectonic plates
Lithosphere – The outer shell of Earth that is made of ________________ and upper
mantle
____Types of Lithosphere:
1) __________________Crust : Made up of the ocean floor
2)_________________ Crust : Made up of continental landmasses
____________Currents: Unequal heating from the Earth’s core causes hotter magma to
___________and cooler magma to ________ down towards the _______and heat up
PLATE BOUNDARIES
There are 3 main ways that the plates interact: Points of interaction are called ________
3 Types of Plate Boundaries:
1)______________: When two plates are moving __________, magma rises and fills
space between plates creating _______________ as it cools . CRUST IS_____________
2)______________: Plates horizontally _____________past one another
3)______________: When two plates _________________. There are ____types
CRUST IS_________________________
CONTINENTAL + OCEANIC=
a. ___________Zone: When an oceanic plate collides with a continental
plate, one plate subducts under the other forming a ______________
CONTINENTAL + CONTINENTAL
b. Two continental plates ________, forming folded mountain ranges
OCEANIC + OCEANIC
c. _________form as one plate subducts and melts . Magma rises to the
surface along the trench and slowly forms an island arc
BOUNDARY FEATURES:
Divergent Boundaries  
1) ___________________- Underwater _________ range that winds throughout
the Earth’s oceans. It is the 40,000 miles long
2) ______________- When the crust is pulled or ‘rifted apart’, valleys form with
steep walls
Transform Boundaries 

1.________________ occur when stress is too great from plates sliding, causing
fracture to form in the crust
Convergent Boundaries 
1) ___________________ subduction and its resulting gas chemical reactions,
causes hot lava, ash and gas to return to the atmosphere
2)
____________________
Magma rises to the surface along the trench and slowly forms
this feature
3) Trench- ______________________________________________
4) Mountains- As ____________________force increases, folded mountains form.
SUMMARIZE TODAY’S NOTES IN 1-2 PARAGRAPHS