Download Our Solar System - Lawndale High School

Warm-up Week 15 Day 1
1. It is generally true that igneous rocks are _______.
• a. made of silicate minerals.
• b. normally contain fossils.
c. easily scratched
d. contain primarily evaporites.
2. Which factors help determine whether a volcanic
eruption will be violent or gentle?
•
•
•
•
a.
b.
c.
d.
composition of the magma
amount of dissolved gases in the magma
temperature of the magma
composition of magma, temperature, and gas pressure.
3. Most intraplate volcanic activity occurs where ___.
•
•
•
•
a.
b.
c.
d.
hot magma descends into the mantle at a plate boundary
oceanic plates diverge
oceanic and continental plates converge
hot mantle plumes rise toward the surface within a plate
“Orogenesis”
“Oro” = mountain
“Genesis” = beginning
Mountain Building!
Chapter 11
Q: How do mountains form?
Plate movements push/pull rocks!
Forces!
Push or Pull
Deformation
• Change in shape or size.
• Happens at plate boundaries
Force & Stress
• Stress = strength of push/pull at one area
• ↑High stress  Deformation
3 Types of Stress
1. Tensional
–
Pulled apart
2. Compressional
–
Pushed together
3. Shear
– Pulled or pushed at
opposite edges
Stress at Faults builds Mountains!
3 Fault Types
1. Strike-Slip Fault
2. Normal Fault
– Tensional
– Fault-block
Mtns.
• Horst ↑
• Graben ↓
3. Thrust Fault
– Compression
– Folded Mtns.
Review:
• 3 plate boundaries
Convergent boundaries
• ___________
Divergent
• ___________
boundaries
Transverse boundaries
• ___________
Convergent
• Most mountains at _______________
boundaries.
• 3 Convergent Boundaries
•
•
•
Oceanic - __________
Oceanic
________
Oceanic - __________
Continental
________
Continental __________
Continental
_________-
Volcanoes!
Folded Mtns!