| A | B |
|---|
| The _________ and _________ make up the lithosphere. | crust and upper mantle |
| The characteristics of ocean plates are _____________. | young, thin, and dense |
| The characterisitics of the continental plates are ________________. | old, thick, and less dense |
| At what kind of convergent boundaries would you find a subduction zone? | ocean-ocean convergence, ocean-continental conversion |
| Where would you find the youngest part of the ocean floor? | Mid Ocean Ridge |
| What features are found at divergent boundaries | mid ocean ridge and rift zone |
| Subduction results in the formation of what? | trench and some sort of volcanos |
| What do continental-continental plate collisions produce? | folded mountains |
| Why wasn't the continental drift theory widely accepted? | Wegener couldn't explain "why" the continents were moving. |
| How does convection transfer thermal energy? | heat rises, cold sinks back |
| What happens to crust along a transform boundary? | It is neither created nor destroyed-only deformed or fractured |
| Where does convection take place in the Earth? | mantle-middle mantle |
| What kind of boundary is a mid-ocean ridge an example of? | divergent |
| Tectonic plates meet at __________. | plate boundaries |
| Why is earth's inner core solid if it's hotter than the outer core? | Surrounding pressure keeps it solid |
| What happens along the edges of moving crustal plates? | earthquakes and vocanoes |
| What are three features created by tectonic avtvity? | island arc volcanoes, volcanic mountain ranges, and trenches |
| What is Pangea? | A supercontinent that existed 200 million years ago |
| What type of boundary creates a trench such as the Marianas Trench? | ocean-ocean convergent; ocean-continent convergence |
| Scientists use volcanoes and eathquake activity to define _____________on the earth. | plate boundaries |
| How do volcanic eruptions affect the atmosphere? | outgassing clouds, sun changes climate, add lots of gases |
| How does the ozone layer protect us? | it absorbs UV rays |
| What is the bottom layer of the atmosphere called? | Troposphere |
| Ozone reacts with automobile exhaust to form what? | smog |
