1. Title of Notes: Volcano Types
Pg. 35 & 36 RS
Goal for lesson: (write on self assessment worksheet) – I can state the difference between a shield, composite, and cone volcano.

2. I’ll know I’ve got it when…
Learning target
I can state the differences between a shield, composite, and cone volcano.
Today I am…
distinguishing a volcano from other land features.
So that I’ll be able to…
identify volcanoes.
I’ll know I’ve got it when…
I can describe each type of volcano and draw a picture of each.

3. Shield Volcanoes Cinder Cone Volcanoes Composite Volcanoes
Types of Volcanoes
There are 3 main types of Volcanoes:
Shield Volcanoes
Cinder Cone Volcanoes
Composite Volcanoes

4. Shield Volcanoes
Shield Volcanoes form from runny lava (low viscosity) that tends to flow long distances before hardening. They generally have quiet eruptions.
Volcano has a broad base and gently sloping sides.
Volcano has a less explosive eruption than other types because the lava flows more easily
Type of magma- Mafic Basalt: black, runny lava
Made of layers of lava
Example: Mauna Loa, Hawaii

6. Cinder Cones or Scoria cones
Form when molten lava is thrown into the air from a vent. As it falls, it breaks into fragments called ash or tephra that harden before hitting the ground.
The ash and tephra make a cone-shaped mound.
They are smaller than other types of volcanoes.
Erupt explosively because magma is thick, which allows pressure to build up.
Can be found on the side of other volcanoes.

7. Example: Krakatau, Indonesia

8. Cinder Cones
New Guinea
Iceland

9. Composite or Stratovolcano
Form from alternating eruptions of quiet lava and large explosive ash eruptions. The layers build up and make a moderate-sized volcano.
Most common kind of volcano
Made of layers of ash/tephra and lava.
Magma composition- Andesite: medium color

10. Example of Composite/Stratovolocano
Mt. Fuji
Mt. Pinatubo-Philippines
1991 eruption

12. Yellowstone
Check out how large some of the lava flows were from the Yellowstone Volcano!!!

13. How does a Caldera Form? A) A Volcano’s pressure starts to build up
B) The Volcano releases large amounts of Lava
C) As the Lava is released, the pressure decreases and the volcanic mountain begins to collapse, forming a concave shape in the center of the volcano.
D) The center of the volcanic mountain may begin to fill with water and form a lake.

14. Crater Lake in Oregon State should actually be called Caldera Lake

15. Label the parts of a volcano
Word Bank:
Main Vent/Crater
Secondary Vent
Magma Chamber
Lava
Ash & Dust Cloud
Tephra Bombs
Cone

17. Follow the directions on the worksheet to complete the activity
Notebook activity
Pg. 36 LS
Follow the directions on the worksheet to complete the activity