Download video guide bb4

Plate Tectonics Online Video Guide-BB#4
Name: ___________________________________________________________________________________Class:_______
Follow the links provided to watch two different plate tectonics videos and fill in the blanks as you go along.
100 Greatest Discoveries: Plate Tectonics
http://www.sciencechannel.com/tv-shows/greatest-discoveries/videos/100-greatest-discoveries-plate-tectonics.htm
1. In the state of _____________________________________________________, two of the world’s largest plates (the
______________________________________ and the _________________________________________) collide.
2. Volcanoes form where plates are ________________________________________________ back into the earth.
3. Some places you have mid-ocean ridges where new earth is formed. In other places, there are strike-slip faults. What is a
strike-slip
fault?___________________________________________________________________________________________________
4. _________________________________________________are very important because they’ve allowed scientists to define
the plate boundaries.
5. Before volcanoes erupt, there is a lot of ______________________________________ in the earth. Then the magma ascends
to the surface causing __________________________________.
6. The sea cliffs in the video formed from _______________________________________ being deposited about
______________________________________ below sea level and have been _______________________________________.
National Geographic: Plate Tectonics
http://education.nationalgeographic.com/education/media/plate-tectonics/?ar_a=1
7. In the year ______________________________, two scientists publicized the most complete picture of the ocean floor that
had ever been created.
8. The illustration called the Tharp-Heezen map was created using ___________________________________ and
measurements of the water’s _________________________________.
9. This map is used as evidence of the theory of
_______________________________________________________________________________________.
10. The theory explains that earth’s solid outer shell called the
______________________________________________ is broken into ____________________________________________.
11. Because _______________________% of the earth is covered in water, the majority of plate boundaries are found on the
___________________________________________________________________.
12. When two oceanic plates tear away from each other at a__________________________________________ plate
boundary, the space between the plates fills with magma that ______________________________________________ when
exposed to cold seawater.
13. ________________________________________________ is one of the few locations where the midocean ridge rises up
out of the ocean.
14. Iceland was pushed up above sea level by a giant volcanic ________________________________.
15. The North American plate and the Eurasian plate move about____________________________________ every year.
16. While some plates are spreading apart at divergent plate boundaries, others are colliding together at a
_________________________________________________ plate boundary.
17. When one plate slides under another, it is called _________________________________________.
18. The pillow shaped rocks found were actually once ________________________________________.
19. The movement of plates causes earthquakes, volcanoes, and supplies____________________________________________
_______________________________________________________________________________________________________.