Harmful & Helpful
When ash mixes with water it can form these fast moving mudflows.
What are lahars?
These volcanoes are flat and ooze lava.
What are shield volcanoes?
This lava usually comes from shield volcanoes.
What is mafic lava?
Magma can be formed when this is decreased.
What is pressure?
Ancient Romans use volcanic ash to do this.
Shield volcanoes are usually found at these boundaries.
What are divergent boundaries?
If Lava is explosive it is like because it is rich in this.
What is silica?
When Magma reaches the surface it is called this.
What is lava?
Volcanic rocks can break down to form this, which is helpful for plants.
What is soil?
These volcanoes are both explosive and non-explosive.
What are Composite Volcanoes / Stratovolcanoes?
What is felsic lava?
Most volcanoes form along these.
What are plate boundaries?
People can use magma to make this kind of energy.
What is geothermal energy?
Stratovolcanoes usually form at these boundaries.
What are convergent boundaries?
Chains of volcanoes are formed by this kind of magma.
What is mafic?
Unlike most volcanoes hot spot volcanoes are located here.
What is the middle of a plate?
Ash can cover this part of a plant, causing it to die.
What are Cindercone Volcanoes?
This lava erupts through fissures at divergent boundaries.
What is Mafic Lava?
These are three things that cause rock to become magma.
What are temperature, pressure, and fluid?