RAP1.___cannot travel through liquids (earthquakes)

2. ___ instrument used to measure the magnitude of an earthquake (seismology)

3.___causes earthquakes (earthquakes)

Volcano Key Questions

1. What is a volcano?

2. What is a nonexplosive eruption?

3. What is an explosive eruption?

4. What is the difference between magma and lava?

5. What determines if a volcano is explosive or nonexplosive?

6. What is pyroclastic material?

1. What is a volcano?• 1. A volcano is a mountain that forms when

molten rock (magma) is forced to Earth’s surface.

2. What is a non explosive eruption?• 2. A non explosive eruption produces lava flows.

http://www.youtube.com/watch?v=488BkTUsMa4

3. What is an explosive eruption? • 3. Explosive eruption blast out gas, rock,

dust, and superheated steam

http://www.youtube.com/watch?v=OowFvnlWI90

4. What is the difference between magma and lava?

• 4. Magma is the melted rock that forms inside Earth.

• Lava flows on Earth’s surface.

5. What determines if a volcano is explosive or non explosive?

• 5. The composition of magma determines what type of explosion. – Explosive volcanoes contain more water and

silica.

6. What is pyroclastic material? • 6 Pyroclastic Material consists of the rock

fragments blown out of a volcano during an explosive eruption

Homework: Copy and then answer1. What is magma?2. What does a nonexplosive eruptionproduce?3. What blasts out of an explosive eruption?4. What is the difference between magmaand lava?5. What determines if a volcano is explosiveor nonexplosive?6. What is pyroclastic material made of?