| A | B |
|---|
| Main layers of the Earth | Crust, core, mantle |
| innermost layer | inner core |
| outermost layer | crust |
| solid iron layer | inner core |
| floats on the asthenosphere | lithosphere |
| located in the upper mantle | asthenosphere |
| supercontinent | Pangaea |
| Theory of plate tectonics/continental drift | Alfred Wegener |
| Evidence that supports Pangaea | mountain ranges, puzzle pieces, fossils, and geological features |
| Pangaea stated to break apart when? | 200 million years ago |
| Three plate boundaries | convergent, divergent, transform fault |
| When two oceanic plates collide | trench and volcano chains are formed |
| When two continental plates collide | mountain ranges are formed |
| When a continental and oceanic plate collide | mountains nad volcanoes are formed |
| what happens when two plates move apart | seafloor spreading, a rift is formed, a valley is formed |
| what happens when two plates slide past each other | earthquakes |
| when two plates collide the boundary is called | convergent |
| when two plates move away from each other the boundary is called | divergent |
| when two plates slide by each other the boundary is called | transform fault |
| The Earth's plates are what? | always moving |
| The place where earthquakes FIRST take place | focus |
| the spot located above where the earthquake takes place | epicenter |
| the first wave of the earthquake | primary wave |
| the second wave of the earthquake | secondary wave |
| The wave that we can see | surface wave |
| which scale measures the amount of energy from the earthquake | Richter |
| Which scale measures teh amount of damage | Mercalli Intensity |
| Which scale measures the overall strength of the earthquake | Moment Magnitud |
| a mountain that has magma that comes out of it | volcano |
| four types of volcanoes | cinder cone, shield, composite, hot-spot |
| a cinder cone erupts how? | a short period of time |
| a shield volcano erupts how? | many times over a long period of time |
| a composite volcano erupts how? | switches between quite and violent, erupt the most violently |
| active volcano is what | is erupting |
| dormant volcano is what | not erupting |
| extinct volcano is what | never going to erupt again |
| hot-spots are | single column of magma, under an island |
| the olderst island formed by a hot-spot is what | farthest away from the hot-spot |
