Mr. Boothby
World Geography
Lecture Ch 5 sec 1
Name_______________________
Please be sure that you use complete sentences when answering all lecture questions.
I. Global Landforms: During the _____ rain, water ______ in street gutters carries
______, twigs, litter, and small ______. Small particles of soil/rock are also
found=sediment=sedimentary rock over time.
1. What would the Earth’s surface be like today if erosion were the only force acting
upon it? What is erosion?
2. What are the four layers that the Earth is composed of? (Explain each layer from page
45)
Layer/
Depth or thickness
Crust:
Mantle:
Outer Core:
Inner Core:
3. What is lava as explained in the text?
4. What is a volcano according to the text?
5. (Bonus/Challenge) How are zits that humans get and volcanoes similar?
6. Where are the plates the thickest? Where are they the thinnest?
7. MATH TIME: What is the total thickness from the center of the inner core to the
lowest layer of the earths crust and the highest? This is a bit tricky!!!
8. What is the definition of “subduction” according to the text? What is the definition of
“trench” according to the text?
9. What takes place when plates slide together? Explain the theory of “plate tectonics”?
Large landforms like non-volcanic mountains!
10. (Bonus/Challenge) How do you think some of the hills and mountains around
Washougal were formed? Why do you think the area around Washougal isn’t flat?