1. Describe 3 types of plate boundaries with definitions and pictures.
2. Who is Alfred Wegener? What was Pangea? What theory did he propose?
3. When you did your pangea puzzles, what 2 things did you use to piece it together?
4. Between which continents is the mid-atlantic ridge? What type of plate boundary is
this?
5. What happens when 2 different types of crust meet? What happens when 2 of the
same types of crust meet?
6. What are convection currents? Describe what influence they in the mantle have on
ocean crust formation and destruction.
7. What is illustrated below? Fill in the blank squares:
Across
5
The frequency, magnitude, and distribution of earthquakes.
6
This ocean is a mature ocean.
8
Area where volcanic activity is taking place, but not at a plate boundary.
11 Subduction zones are an example of this plate boundary.
14 The magnetic field of the Earth.
15 The driving force pushing magma up at the mid-ocean ridge and pulling it back down where ocean crust meets continental crust.
17 This sea is in the embryonic stage of ocean development and is sliding apart becoming larger.
19 As _______ rocks crystallize, some minerals align themselves with Earth’s magnetic field.
21 The name of the massive supercontinent.
23 Expansion of the crust in one area requires __________ of the crust in other areas.
24 Fourth stage - subduction eliminates much of sea floor and oceanic ridge.
25 An area of increasingly deeper seismic activity, inclined from the trench downward into the mantle.
27 This is name for the crust and the very top layer of the mantle.
28 This is the top of the mantle where molten magma is found.
Down
1
Third Stage - sea floor basalts begin forming as continental sections diverge.
2
This ocean is declining.
3
This is the life cycle of an ocean.
4
The evidence of past magnetic fields when rock crystalizes and records the direction of the poles at that time.
7
First stage - Rift valley forms as continent begins to split.
9
Sixth stage - continents collide forming a continental mountain chain.
10 The process of the creation of oceanic crust at the mid-ocean ridge.
12 Wegener's hypothesis of the movement of the continents.
13 Second stage - sea floor basalts begin forming as continental sections diverge.
16 Destruction of the crust occurs in these.
18 The Mid-Atlantic Ridge is an example of this plate boundary.
20 The San Andreas Fault is an example of this plate boundary.
22 Fifth stage - last of the sea floor is eliminated.
26 As new crust is formed, ______ crust is pushed out of the way and is found farther away from the mid-ocean ridge.
1. Describe 3 types of plate boundaries with definitions and pictures.
2. Who is Alfred Wegener? What was Pangea? What theory did he propose?
3. When you did your pangea puzzles, what 2 things did you use to piece it together?
4. Between which continents is the mid-atlantic ridge? What type of plate boundary is
this?
5. What happens when 2 different types of crust meet? What happens when 2 of the
same types of crust meet?
6. What are convection currents? Describe what influence they in the mantle have on
ocean crust formation and destruction.
7. What is illustrated below? Fill in the blank squares:
Across
5
The frequency, magnitude, and distribution of earthquakes.
6
This ocean is a mature ocean.
8
Area where volcanic activity is taking place, but not at a plate boundary.
11 Subduction zones are an example of this plate boundary.
14 The magnetic field of the Earth.
15 The driving force pushing magma up at the mid-ocean ridge and pulling it back down where ocean crust meets continental crust.
17 This sea is in the embryonic stage of ocean development and is sliding apart becoming larger.
19 As _______ rocks crystallize, some minerals align themselves with Earth’s magnetic field.
21 The name of the massive supercontinent.
23 Expansion of the crust in one area requires __________ of the crust in other areas.
24 Fourth stage - subduction eliminates much of sea floor and oceanic ridge.
25 An area of increasingly deeper seismic activity, inclined from the trench downward into the mantle.
27 This is name for the crust and the very top layer of the mantle.
28 This is the top of the mantle where molten magma is found.
Down
1
Third Stage - sea floor basalts begin forming as continental sections diverge.
2
This ocean is declining.
3
This is the life cycle of an ocean.
4
The evidence of past magnetic fields when rock crystalizes and records the direction of the poles at that time.
7
First stage - Rift valley forms as continent begins to split.
9
Sixth stage - continents collide forming a continental mountain chain.
10 The process of the creation of oceanic crust at the mid-ocean ridge.
12 Wegener's hypothesis of the movement of the continents.
13 Second stage - sea floor basalts begin forming as continental sections diverge.
16 Destruction of the crust occurs in these.
18 The Mid-Atlantic Ridge is an example of this plate boundary.
20 The San Andreas Fault is an example of this plate boundary.
22 Fifth stage - last of the sea floor is eliminated.
26 As new crust is formed, ______ crust is pushed out of the way and is found farther away from the mid-ocean ridge.