The document discusses volcanoes, including the differences between magma and lava, explosive versus non-explosive eruptions, factors that influence eruption type like water and silica content, types of volcanic features and pyroclastic materials, and how volcanoes form and are predicted.

1. Volcanoes 101

2. Magma - molten rock under the
earth
Lava - magma that has reached
the surface
Non-explosive Eruptions
lava flows - rivers of hot
lava
Lava fountains - sprays of
lava from non-explosive
eruptions

3. Is this an explosive or non-explosive
eruption?
What is this volcanic
formation called?

6. Explosive Eruptions
- clouds of hot gases, lava and solid rock explode
out of volcanoes at super high speeds

7. Magma composition
Water - The more water the more explosive the volcano
will be, like CO2 in a soda can.
Silica - Magma with lots of silica will harden in the vents
and cause a pressure build up and a larger explosion.
Less silica means runny lava.

8. Types of lava
1. Blocky Lava
2. Pahoehoe
3. Aa
4. Pillow

9. Types of Pyroclastic Material
1. Volcanic Blocks
2. Volcanic Bombs
3. Lapilli
4. Volcanic Ash

10. Volcanoes' Effect on the Earth
1. Flows and Fall out
2. Climatic Changes

11. Volcanoes
Types of volcanoes
1. Cinder cones
2. Shield Cones
3. Composite cones or
Stratovolcanoes

12. Label each volcano
Types of volcanoes
1. Cinder cones
2. Shield Cones
3. Composite cones or
Stratovolcanoes

13. Craters
Vent
Magma
Chamber
Lava Plateaus

14. Caldera

15. Lava Plateau

16. Formation of Magma
1. Pressure
2. Temperature
3. Density

17. Where do volcanoes occur?

18. Prediction of Volcanoes
1. Measuring small quakes
2. Measuring Slope
Tiltmeter

19. 3. Measuring Volcanic Gasses
4. Measuring Temperature from Orbit