Download Earth`s surface consists of a number of rigid, but moving, pieces

Chapter 4 Notes – Section 4.1 – Continental Drift
Earth’s surface consists of a number of ____________, but moving, pieces
called _______________.
What is
continental
This idea of plate movement (_____________________
drift?
_____________) was first explained when _____________
____________________, a German scientist, discovered several pieces
of evidence.
What is
some
evidence
that
supports
this theory?
1)
2)
3)
The shape of ________________
________________________and Africa fit together
like a ______________
Similar ___________________ and rock layers are
found on the edges of ___________________ that
are currently not connected.
______________ Evidence. The rock record shows
where some continents were once _____________,
or were once covered in _______________ indicating
that they once existed in a different _____________
zone.
_______________________: About every _______ million years earth
reverses its___________________. This change is recorded in the rock
record. It shows the ___________ at which the sea floor is
______________ away from spreading centers.
Section 4.2 – Plate Tectonics
What
causes
plate
tectonics?
Plates move______________, away, and _______________ each other.
When plates collide the _____________ plate slides under the other.
(_______________crust slides under ______________________ crust)
Plate movement is generated by _______________ ____________ in the
mantle caused by the rising of ________________ material and the sinking of
__________________ material.
The stress and action at plate boundaries creates regions where
________________ and _______________________ are common.
KINDS OF PLATE BOUNDARIES
What are
the
I)
different
kinds of
plate
II)
boundaries?
III)
_________________ Boundary: also called a spreading center. A
place where two lithospheric plates are moving __________.
_________________Boundary: Where lithospheric plates slide
______________ past each other. Sometimes considered to be a
part of a ______________________ boundary.
_________________Boundary: Where ___ plates come together.
A.
B.
_________________ Boundary: Where two continents collide
and are welded together – forming a mountain range.
_________________Boundary: Where one plate is pushed
under another plate.
__________: ancient continent cores. The oldest and most _________rock.
(example: the Canadian Shield)
Sources of Continental _________________
What are
some
possible
sources of
continental
growth?
Deep-sea ___________________
___________________ rock
Stream __________________
______________ – a large block of lithospheric plate that moved a great
distance and then attached to the edge of a large ___________________
I)
II)
III)