Download Type in the following website to your browser, or go to the Class

Name______________________________Teacher___________Period_______Date_________
Type in the following website to your browser, or
go to the Class Links on my webpage to access it.
http://www.learner.org/interactives/dynamicearth/
If you don’t finish today and need to restart in the middle of this tomorrow, go to the green
bar across the top of the page to choose the chapter on which you stopped.
Read the intro and click on “Start your exploration with Earth's Structure.” Roll your mouse
over each layer and answer the questions below.
_______________1. How wide is the inner core?
_______________2. How wide is the outer core?
_______________3. Into how many regions is the mantle divided?
_______________4. Which layer that we haven’t studied yet is directly underneath the
lithosphere?
_______________5. The lithosphere is divided up into what slow moving objects?
_______________6. What is the average thickness of the crust under the continents?
Click on “Next Chapter: Plate Tectonics.” Follow the directions given on the page, then
click on “How Do We Know This” and answer the following questions.
_______________7. Whose observations & theories became the basis for the plate tectonics
theory?
_______________8. How many years ago did Madagascar separate from Africa?
_______________9. How many years ago did the Indian landmass separate from the AntarcticaAustralia landmass?
_______________10. How many years ago did Greenland separate from North America?
_______________11. During what decade did the theory of plate tectonics become widely
accepted?
Click on “Continents Over Time” and follow the directions given there. This will lead you
to click on “Plate Boundaries” when you are finished.
_______________12. According to this website, how many major tectonic plates are there?
Name______________________________Teacher___________Period_______Date_________
_______________13. Which type of crust is thickest, continental crust or oceanic crust?
_______________14. Which type of crust is oldest, continental crust or oceanic crust?
_______________15. All the plates have names, usually referring to ___, oceans, or regions of
the globe where they are located.
_______________16. How many different main types of plate boundaries are there?
_______________17. A ___ boundary marks two plates that are moving apart.
_______________18. A ___ boundary occurs where two plates slide past one another.
_______________19. A ___ boundary occurs where two plates are pushing toward each other.
_______________20. The boundary between the African plate and the Arabian plate in the Red
Sea is an example of a ___ boundary.
_______________21. The boundary between the Pacific plate and the North American plate in
California is an example of a ___ boundary.
_______________22. The boundary that occurs along the western coast of South America is an
example of a ___ boundary.
Use the map at the bottom of the screen to see where the three different types of plate
boundaries are found throughout the world. First, find the KEY in the green box located
in the lower right-hand corner of the map. Then, roll your mouse over each boundary
name in the KEY to see its location. Answer the following questions.
_______________23. Between the African plate and the Antarctic plate is mostly a ___
boundary.
_______________23. Between the Arabian plate and the Indian plate is a ___ boundary.
_______________23. Between the Eurasian plate and the Indian plate is a ___ boundary.
Click on “Plates and Boundaries Challenge” and follow the directions given. Only play the
Plates and Boundaries Challenge once and then move onto the next chapter titled “Slip,
Slide and Collide.”
_______________24. Each kind of plate boundary is associated with particular events, so if you
know about the ___ taking place at a plate boundary, you can often predict what's likely to occur
there — volcanoes, earthquakes, mountains, trenches — in the future!
Name______________________________Teacher___________Period_______Date_________
Click on “See What Happens at Different Plate Boundaries.”
Convergent Boundaries – Colliding Plates
_______________ 25. The events that occur at convergent boundaries are linked to the types of
plates, ___ or continental, that are interacting.
_______________ 26. Which plate is pulled underneath the other when oceanic and continental
plates collide? (This is called “subduction.”)
_______________ 27. As the oceanic crust sinks, a ___ is formed at the edge of the continent.
Roll your mouse over each name to review layers of the Earth and the subduction zone.
_______________ 28. What is the name of the active volcanic region that encircles the Pacific
Ocean?
_______________ 29. When two oceanic plates collide with one another, the ___ one sinks
below the other one.
_______________ 30. An example of island arcs that are produced from this are the ___ Islands
in Alaska.
_______________ 31. This kind of collision often causes ___ which can result in tsunamis.
_______________ 32. How many people were killed in Asia due to a tsunami like this in 2004?
_______________ 33. Most often, a collision between two continental plates crunches and folds
the rock at the boundary, lifting it up and leading to the formation of ___.
Roll your mouse over each name to review layers of the Earth and mountains.
_______________34. The ___ Mountains contain the tallest mountain peaks on Earth.
_______________35. Are the Himalaya Mountains getting taller or shrinking in size?
Divergent Boundaries – Spreading Plates
_______________36. Divergent plates pulling apart from one another in the ocean contribute to
___ spreading.
_______________37. What is formed when two continental plates diverge?
_______________38. After the rift occurs, valleys form, volcanoes are more active, narrow ___
may form.
Click on Start to see an animation of this.
Name______________________________Teacher___________Period_______Date_________
Transform Boundaries – Grinding Plates
_______________39. In which direction are plates moving past each other at transform
boundaries?
_______________40. What is formed as a result of this type of movement?
_______________41. What is built up along this fault and then released as an earthquake?
_______________42. How long is the San Andreas fault in California?
_______________43. According to the website, when was the most recent “major event” along
this fault?
Click on “Plate Interactions Challenge.” Participate in the challenges as directed on the
screen. After this, you will be finished for the day.
You will participate in “Test Your Skills” on a separate day. You will use the information
you filled out here, and it will be for a grade.