Noteform 2-1: Forces in Earth’s Crust (pages 44 – 50)
Name: _____________________________________ Section: _____
1. Stress is a ____________________ that acts on rock to change its shape or
volume.
2. Which kind of stress pulls and stretches rock apart:____________________
3. The force above occurs where two ___________________ are moving apart.
4. Which kind of stress squeezes rock together: __________________________
5. The force above occurs where one plate __________________ against another,
which can compress rock until it folds or breaks.
6. Which kind of stress pushes rock in two opposite directions: ________________
7. The force above can cause masses of rock to ________________ apart or change
shape.
8. Most changes in the crust occur so slowly that they cannot be observed directly.
But if you could speed up time so a billion years passed by in minutes, you could
see the crust:
_________________, __________________, __________________,
___________________,__________________ and slide.
9. When enough stress builds up in a rock, the rock breaks, creating a
__________________, which is a break in the rock of the crust where rock surfaces
________________ past each other.
10. Most ____________________ occur along plate _________________________,
where the forces of plate motion push or pull the crust so much that the crust
breaks.
11. Normal Faults are caused by which kind of stress: _________________________
12. The block of rock above the fault is the ________________________ wall.
13. The rock that lies below the fault crack is called the _________________wall.
14. Normal faults occurs where plates _____________________.
15. Reverse faults are caused by which kind of stress: _________________________
16. Strike-Slip faults occur by which kind of stress: _________________________
17. Strike-Slip faults occur in places where plates move ______________________
18. The famous San Andreas fault in California is an example of which kind of fault?
_______________________________
19. Draw a system of folded rock below and label the “anticline” and “syncline.”
20. Folds are bends in the rock that form when compression _________________and
_______________________part of Earth’s crust.
21. The upward arch of a fold is called a: _________________________
22. The downward arch of a fold is called a: _________________________
23. Name three mountain ranges in the world where you can expect to find folded
mountains due to slow compression forces or plate collisions?
_____________________ & _______________________ & ___________________
24. When two normal faults cut through a block of rock, a ____________________________________________ mountain forms, such as the Great Basin in California.
25. The forces that raise mountains can also uplift, or raise_____________________,
which is a large area of flat land elevated high above sea level.
EXTRA: There are four states with borders that geographically connect like this:
+
This region is called the “Four Corners.” Which four (4) states make up the Four Corners
region of the Colorado Plateau?
_________________, ___________________, _________________, ________________