|convergent boundaries||twenty||iron||distinct||divergent boundaries|
|evidence of rocks||Pangaea||lithosphere||oceanic crust||mantle|
|inner core||plate tectonics||continental crust||tranform fault||climatic evidence|
|Alfred Wegener||asthenosphere||plate tectonics||outer core||lithosphere|
|asthenosphere||fit of the continents||crust||fossil evidence|
____________________ 1. The scientific theory which describes the mobile earth is called.
____________________ 2. At the center of the earth is a solid metallic sphere called.
____________________ 3. Above the outer core is the _____, a thick plastic-like layer which is capable of flow.
____________________ Name the two kinds of crust.
____________________ 5. The ____ consists of the crust and the uppermost mantle.
____________________ 6. Scientists think that the weak rock within the ____ allows the earth's rigid outer shell to move.
___________________ 7. The continental drift hypothesis is credited to _________, a German scientist who first proposed the idea.
____________________ 8. In addition to the four major layers of the earth, scientist have discovered a hot, weak zone within the upper mantle called the _____.
____________________ 9. In the continental drift hypothesis there was a supercontinent called ______.
____________________ Name the four types of evidence that supports the sontenintal drift hypothesis.
____________________11. The theory of ____ holds that the outer crust of our earth consist of segments called plates.
____________________12. When plates move apart the boundaries between them are called _______.
____________________13. The inner core is composed of ______, with nickel and other elements present.
____________________14. Surrounding the inner core is a layer of thick mobile liguid called the ______.
____________________15. The mantle supports a very thin, rigid outermost layer called the _____.
____________________16. Above the asthenosphere is the solid, rigid outer portion of the earth called the _____.
____________________17. The theory of plate tectonics holds that the outer, rigid crust of our earth consists of about _____segments called plates.
____________________18. According to the plate tectonics model, each plate moves as a ______ unit.
____________________19. Boundaries where plates move together are called _________.
____________________20. Boundaries where plates slide past each other are called ______.
BONUS: Who was the first president of the United States?