#
Plate
#
Term
Description
Place the # from the Description
next
the correct
Term.
1
thecolumn
zone where
an to
oceanic
plate is sinking
below a plate containing continents at a
converging plate boundary
the process by which rocks move past one
another along a fracture or cracking the earth’s
crust, usually occurring where plates are
separating, sliding past one another, or
colliding
Asthenosphere
2
Tectonics
3
Lithosphere
4
Folding
5
Faulting
6
A fault where two sections of the earth’s crust
move almost horizontally past each other
Hot Spot
7
the boundary between two plates that are
moving apart or separating, at a mid-ocean
ridge
Converging plate boundary
8
Diverging plate boundary
9
a rigid slab of solid lithosphere rock that has
defined boundaries and floats on the denser
rocks of the asthenosphere
a point on the earth’s surface where strong
upward convection currents or plumes of hot
magma in the upper mantle push up below the
plates of the lithosphere causing volcanic
activity
Transform plate boundary
10
A block of hard rock left standing above the
landscape when an extinct composite volcano is
eroded away over millions of years.
Subduction zone
11
Sea-floor spreading
12
Viscosity
13
Transform Faults
14
the process that bends and twists rocks through
compression or squeezing
the boundary between two plates that are
moving towards one another
the processes that deform the earth’s
lithosphere and the rock structures and surface
features created by these processes
The downward movement and eventual melting
of an oceanic plate as it sinks into the
asthenosphere along converging plate
boundaries
Fault Scarps
15
the boundary between two plates that are
slipping or sliding past one another
the plastic (part solid, part liquid) layer of the
upper mantle directly below the lithosphere that
can flow slowly when put under constant
pressure.
The often straight, continuous cliff created by
the uplift of the earth’s crust along a fault line
Rock beds that have been folded or bent
downwards to form a valley
Strike-slip Faults
16
The resistance to flow of a liquid, such as
magma or molten rock
Subduction
17
A fault formed by the horizontal movement of
the earth’s crust, occurring where two plates are
sliding past one another
Volcanic Necks
18
Rock beds that have been folded or bent
upwards to form a hill or mountain
Composite Volcanoes
19
The process that creates new sea floor as plates
spread apart or separate at mid-ocean ridges
Anticlines
20
A smooth-sloped volcanic peak with a summit
crater made up of alternating layers of ash and
lava, formed from andesitic magma at
subduction zones
Synclines
21
the solid outer layer of the earth where the
rocks are less dense and more rigid than those
of the asthenosphere below; includes the top
part of the mantle and all of the crust.
1. What sets the continental plates in motion? Describe the process. (1 mark)
2. Briefly explain the difference between Converging, Diverging and Transform
Fault boundaries. (3 marks)
Converging…
Diverging….
Transform Fault….
3. Give 1 evidence of sea-floor spreading that scientists have? (1 mark)
4. Give 2 reasons why diverging tectonics are less violent than converging
tectonics? (2 marks)
5. What causes the narrow valleys along a fault line? (1 mark)
6. What is fault creep? (1 mark)
7. Explain what it means when the plates are locked. What is the result then? (1
mark)
8. How do laser sensors, seismographs and strain gauges help scientists detect and
predict earthquakes? (1 mark)
9. What are the two types of converging plate boundaries? (2 marks)
10. Describe how it is possible for one plate of rock to descend beneath another. Ie,
what are the elements necessary to allow that to happen? (1 mark)
11. Briefly describe what happens when two plates collide and neither of those plates
is able to descend beneath the other? (1 mark)
12. Explain why some volcanoes are more spectacular and destructive than others. (1
mark)
13. What is the difference between continental volcanic arcs and island arcs? (1 mark)
14. Scientists speculate ocean floor rock is much younger that continental rocks. Why
would ocean floor rocks be younger? (1 mark)
15. Cratons are described as the roots of mountains. Explain. (1 mark)
16. Briefly describe 2 processes of accretion. (2 marks)