PHS Chapter 9 Plate Tectonics
Help!
|
|
||||
|---|---|---|---|---|---|
| continental drift | Wegener's idea that the continents slowly moved over the Earth's surface.
🗑
|
||||
| Pangaea | Pangaea was a single landmass where all of the continents were joined together.
🗑
|
||||
| trench | the deepest parts of earth's oceans-a surface feature in the seafloor produced by the descending plate during subduction.
🗑
|
||||
| mid-ocean ridge | longest mountain range in the world - most of ridge underwater - a divergent plate boundary where sea-floor spreading occurs.
🗑
|
||||
| rift valley | deep faulted structure found along the aces of divergent plate boundaries; rift valleys can develop on the seafloor or on land.
🗑
|
||||
| sea-floor spreading | the process by which plate tectonics produces new oceanic lithosphere at ocean-ridges.
🗑
|
||||
| subduction | the process by which oceanic crust sinks beneath a trench and back into the mantle at a colliding plate boundary
🗑
|
||||
| paleomagnetism | the magnetization of a rock that reflects the polarity and direction of Earth's magnetic field at the time that the rock was formed.
🗑
|
||||
| plate | a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
🗑
|
||||
| plate tectonics | geological theory - states that pieces of Earth's lithosphere are in constant motion and are driven by the convention currents in the asthenosphere
🗑
|
||||
| divergent boundary | where two plates move apart
🗑
|
||||
| convergent boundary | where two plates move together
🗑
|
||||
| transform fault boundary | where two plates slip past each other moving in opposite directions
🗑
|
||||
| continental volcanic arc | mountains formed in part by volcanic activity caused by the subduction of oceanic lithosphere beneath a continent
🗑
|
||||
| volcanic island arc | a chain of volcanic islands generall located a few hundred kilometers from a trench where subduction of one oceanic slab beneath another is occuring.
🗑
|
||||
| convection current | the transfer of heat by the movement of a mass or substance - only takes place in fluids.
🗑
|
||||
| mantle plume | a mass of hotter-than-normal mantle mterial that ascends toward the surface, where it may lead to igneous activity.
🗑
|
||||
| slab-pull | a mechanism that contibutes to plate motion in which cool, dense oceanic crust sinks into the mantle and pulls the trailing lithosphere along
🗑
|
||||
| ridge-push | a mechanism that may contribute to plate motion; it involves the oceanic lithosphere sliding down the oceanic ridge wwunder the pull of gravity.
🗑
|
||||
| fossil | any trace of an ancient organism that has been preserved in rock
🗑
|
||||
| SONAR | device that bounces sound waves off underwater objects and then records the echoes of these sound waves - sound navigation and ranging.
🗑
|
||||
| faults | a fracture in Earth along which movement has occurred.
🗑
|
||||
| scientific theory | a well tested concept that explains a wide range of observations
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
melaniebird
Popular Earth Science sets