Term
| How was the Atlantic Ocean formed? |
|
Definition
| Through the gradual break of the super continent, Pangea. |
|
|
Term
|
Definition
PANGEA!!
Oceans are formed through divergent boundaries. As lands shift away from each other because of plate tectonics, rift valleys are created which collect water forming oceans. |
|
|
Term
| Where's a good place to study plate tectonics? |
|
Definition
| ICELAND - right between the mid-Atlantic Ridge |
|
|
Term
| What happens between the margins of litsopheric plates? |
|
Definition
| land is either CREATED or DESTROYED |
|
|
Term
| What is the rate at which plates spread apart? |
|
Definition
|
|
Term
|
Definition
| Divergent boundaries causes land to spread, magma from the earth's core comes UP, hardens when it reaches the surface forming new land. |
|
|
Term
| Where are new ocean basins being formed currently? |
|
Definition
| The Mid-Atlantic Ridge, along the divergent plate boundary. |
|
|
Term
| With Iceland being on a divergent one with the Mid -Atlantic Ridge running through the middle, what are the possibilites that could happen? |
|
Definition
One - Iceland will split into two
Two - materials will be deposited and it will stretch and get bigger |
|
|
Term
| What happens in a CONVERGENT ZONE? |
|
Definition
| Lithospheric plates are COMING TOGETHER |
|
|
Term
| What happens in a DIVERGENT ZONE? |
|
Definition
| Lithospheric plates are PULLING APART, |
|
|
Term
| Are oceanic or continental plates more dense? What happens when these two plates CONVERGE? |
|
Definition
Oceanic plates are MORE DENSE than Continental plates. Continental plates are older and lighter (less dense) SO the oceanic plate SINKS.
This sinking is called a SUBDUCTION ZONE. |
|
|
Term
| How were the Andes Mountains Formed? |
|
Definition
The Andes Mountains were created through a SUBDUCTION ZONE between the Nazca Continental Plate and the South American Oceanic Plate.
The Oceanic plate sunk below the Nazca and frictional forces pushed up magma forming the mountains. |
|
|
Term
| How are deep canyons (trenches formed?) |
|
Definition
| Through a subduction zone magma comes to the top forming mountains and trenches are created at the point of sinking. |
|
|
Term
| What is the Ring of Fire? |
|
Definition
| is thouands of miles of trenches in the South Pacific that was created through a oceanic - convergent subduction zones. |
|
|
Term
| Where are the world's most active volcanoes found? |
|
Definition
| In oceanic - convergence subduction zones |
|
|
Term
| Where is an example of an oceaninc to oceanic subduction zone? |
|
Definition
Marianas Trench
Aletian Islands |
|
|
Term
| Where is the deepest point anywhere on Earth? |
|
Definition
| The Mariana Trench - it's about 11,033 meters deep. |
|
|
Term
| What happens during a continental - continental zone? where's an example of this? |
|
Definition
the continental plates are light, so there is a SLIGHT push up.
Example would be the Himalayans. |
|
|
Term
| What kind of zone is the San Andreas Fault in California? |
|
Definition
Neither a convergent or divergent zone, the plates are SLIDING PAST EACH OTHER.
this creates a transforming boundary. |
|
|
Term
| How are chains of islands formed? |
|
Definition
| Hotspots are stationary, lithospheric plates are moving, new land is created, land moves over millions of years and chains of islands are formed. |
|
|
Term
| In the Hawaiian islands, what direction is the plate moving? |
|
Definition
|
|
Term
| Why are the islands that are farther away from the hotspot smaller? |
|
Definition
| Overtime, the land is eroded that slowly breaks them down to smaller sizes |
|
|
Term
| Where can an earthquake happen that is much stronger than the San Andreas Fault? |
|
Definition
| The Cascadia Subduction near Canada and Washington |
|
|
Term
| What's the average depth of the global ocean? |
|
Definition
|
|
Term
| Which ocean is the deepest? |
|
Definition
|
|
Term
| Which ocean is the shallowest? |
|
Definition
|
|
