2. Earth Layers
Physical
Layers
Continental Drift
Seafloor Spreading
Plate Boundaries
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3. This is the only liquid layer of the Earth
Earth Layers: $100
This is the only liquid layer of the Earth
Answer: What is the outer core?
1,1

4. The physical layer of the Earth on which the tectonic plates move.
Physical Layers: $100
The physical layer of the Earth on which the tectonic plates move.
Answer: What is the asthenosphere?
1,2

5. Answer: What is Pangaea?
Continental Drift: $100
This is the name that Alfred Wegener gave to the ancient supercontinent
Answer: What is Pangaea?
1,3

6. This is the physical feature that results from sea-floor spreading
Answer: What is a mid-ocean ridge?
1,4

7. This type of plate boundary involves plates sliding past one another
Plate Boundaries: $100
This type of plate boundary involves plates sliding past one another
Answer: What is a transform boundary?
1,5

8. This layer is made of a dense ball of solid metal (nickel and iron)
Earth Layers: $200
This layer is made of a dense ball of solid metal (nickel and iron)
Answer: What is the inner core?
2,1

9. The rigid layer made up of the crust and upper mantle.
Physical Layers: $200
The rigid layer made up of the crust and upper mantle.
Answer: What is lithosphere?
2,2

10. Answer: What are fossils?
Continental Drift: $200
One clue to support continental drift was the fact that these were found on multiple continents
Answer: What are fossils?
2,3

11. Answer: What is sea-floor spreading or new sea floor forms?
What will most likely happen when oceanic lithospheric plates move away from each other?
Answer: What is sea-floor spreading or new sea floor forms?
2,4

12. Answer: What is a convergent boundary?
Plate Boundaries: $200
Two plates moving toward one another is known as this kind of boundary.
Answer: What is a convergent boundary?
2,5

13. Earth Layers: $300
When oceanic and continental plates collide, the oceanic plate is usually subducted because of this.
Daily Double!
Answer: What is because the oceanic crust is more dense and thinner than the continental crust?
3,1

14. This is the strong, lower part of the mantle.
Physical Layers: $300
This is the strong, lower part of the mantle.
Answer: What is mesosphere?
3,2

15. The tectonic plates are moving at this pace or speed.
Continental Drift: $300
The tectonic plates are moving at this pace or speed.
Answer: What is about 2 cm per year?
3,3

16. This is what determines which plate
Sea-floor Spreading: $300
This is what determines which plate
will sink into the mantle at a trench
Answer: the older, denser plate
will sink
3,4

17. Answer: What is an ocean/ocean
Plate Boundaries: $300
Two plates that are under water
are moving toward one another.
Answer: What is an ocean/ocean
convergent boundary?
3,5

18. This layer accounts for less than 1% of Earth’s mass.
Earth Layers: $400
This layer accounts for less than 1%
of Earth’s mass.
Answer: What is the crust?
4,1

19. This is the solid, dense portion of the Earth
Physical Layers: $400
This is the solid, dense portion of the Earth
made of solid nickel and iron.
Answer: What is the inner core?
4,2

20. This is what Wegener inferred from the shape of the continents.
Continental Drift: $400
This is what Wegener inferred from
the shape of the continents.
Answer: They once fit together like
a puzzle.
4,3

21. This is where the youngest ocean crust
Sea-floor Spreading: $400
This is where the youngest ocean crust
is in relation to the mid-ocean ridge.
Answer: What is closest to the
mid-ocean ridge?
4,4

22. The Mid-Atlantic Ridge is an example of this type of boundary
Plate Boundaries: $400
The Mid-Atlantic Ridge is an
example of this type of boundary
Answer: What is a divergent boundary?
4,5

23. Which layer(s) account for 33% of the Earth’s mass?
Earth Layers: $500
Which layer(s) account for 33% of the
Earth’s mass?
Answer: What are the inner and outer core?
5,1

24. This composition layer is actually in three different physical layers.
Answer: What is the mantle: lithosphere,
asthenosphere, and mesosphere
5,2

25. What is the layer of the Earth where convection currents occur?
Continental Drift: $500
What is the layer of the Earth where
convection currents occur?
Answer: asthenosphere
5,3

26. Sea-floor spreading occurs at this kind of boundary.
Answer: What is divergent boundaries?
5,4

27. Most volcanoes and earthquakes are found here.
Plate Boundaries: $500
Most volcanoes and earthquakes are found here.
Answer: What is along the boundaries
of tectonic plates.
5,5