Crust and lithospheric plates
What percentage of the Earth's surface is covered by water and what percentage is covered by land?
71% water and 29% land
What makes stratovolcanoes more dangerous than other volcano types.
They have explosive eruptions due to thick, vicious magma and trapped gases.
What is the main cause of an explosive volcanic eruption?
High gas content and thick (vicious) magma
What is the agency in the Philippines that monitors volcanic activity?
PHIVOLCS
What happens during a divergent boundary?
Plates move away from each other
Give the 3 types of Volcano
Cinder cone volcano, Shield volcano, and Composite/Stratovolcano
What happens when magma cools before reaching the surface?
It becomes intrusive igneous rock.
NDRRMC stand for____
National Disaster Risk Reduction Management Council
What are the two main types of the Earth’s Crust?
Oceanic and Continental Crust
Describe a shield volcano and give example.
Gentle-sloping, wide volcano formed by runny lava. Example: Mauna loa, Hawai
Describe how magma behaves during an explosive eruption.
Magma is thick, traps gas, and erupts violently.
Why is it important to listen only to official updates?
To avoid misinformation and stay safe with trusted guidance.
What happens during a convergent boundary?
Two plates move toward each other and may collide.
Compare shield volcanoes and composite volcanoes. What makes them different?
(Students describe differences in shape, eruption type, and magma)
Describe how lava behaves during quiet eruption.
Lava is thin and runny travels far, forms broad slopes
What does PHIVOLCS stands for?
Philippines Institute of Volcanology and Seismology
What natural events happen because of the movement of lithospheric plates?
Earthquakes, Volcanic eruptions, and Mountain formation
Explain how a composite/stratovolcano is formed.
Composite are built from alternating layers of lava and ash over many eruption.
Explain why understanding the type of eruption is important for volcano safety.
Helps people prepare, evacuate, and reduce damage.
Why is it important for PHIVOLCS to issue volcano alerts?
To warn people of possible eruptions and keep communities safe.