1. PLATE TECTONICS NOTES

2. Many cultures used ______ and _________ to explain earthquakes, __________ and tidal waves.
myths
legends
volcanoes

3. Scientists used the _____________________ and developed a _________ based on facts (evidence).
Scientific Method
theory

4. Plate Tectonics Theory
= The Earth is _________ by a thin layer of large, moving ______.
covered
plates

5. Alfred Wegener
first developed the _______ of Continental Drift (now called ___________________ ) using fossils, ______ formations and matching coast lines.
theory
Plate Tectonics
rock

6. Plates can _________ apart, _________ head-on, _________ (one slides under the other), or _____________ each other in opposite directions.
spread
collide
subduct
slide past

7. As a result, a lot of _____ crust forms, old crust gets destroyed, ___________ rise, volcanoes _________ , and ___________ happen between plates.
new
mountains
erupt
earthquakes

8. Plates under the ocean were discovered using ________ .
sonar

9. Ridges and ___________ were discovered on the __________.
trenches
sea floor

10. = _______ core, ________ core, ________ , _____. inner outer mantle
Earth’s layers
= _______ core, ________ core, ________ , _____.
inner
outer
mantle
crust
Outer Core
Crust
Inner Core
Mantle

11. Fault
= a ______ in the Earth’s _______ where there has been movement caused by _______.
crack
crust
stress

12. Mid-Ocean Ridge
= _____ on the sea floor where new crust is _______ & plates are spreading _______.
area
forming
apart

13. = the ________ plate we live on. tectonic
North American Plate
= the ________ plate we live on.
tectonic
North American
Plate

14. Pacific Plate
= the tectonic plate _____ of the North American Plate. ____________ is located on it.
west
Los Angeles
Pacific
Plate

15. Pangaea
= one _____________ mass before continents separated.
large land

16. Sea-floor spreading
= the outflow of ___________ material along ___________ ridges.
new crust
mid-ocean

17. Theory
= ____________ which covers the known ______ .
explanation
facts

18. Trench plate under plate
= an area where one tectonic ______ is going down _____ a second ______ .
plate
under
plate

19. The End