Types of Volcanoes
Which type of volcano has steep angled sides, throws blobs of lava in the air that falls as cinders, and is built over a short period of time?
Cinder cone volcano
What is molten rock above the Earth's surface?
Lava
What is the molten rock under the Earth's surface?
Magma
What is the theory that helps scientists understand how and where volcanoes erupt?
Theory of Plate Tectonics
Which type of volcano has thick, slow moving lava?
Shield volcano
Do volcanoes erupt continuously or at irregular intervals?
Both!
Large projectiles thrown through the air during an eruption is called ?
volcanic bombs
When lava cools and hardens, it forms which type of rock?
Igneous
This type of volcano spills thick lava which cools and piles up around the vent. Which volcano is this?
Lava dome volcano
A large basin-like depression resulting from the collapse of the center of a volcano is called a ?
Caldera
What happens when more dense oceanic crust slides under the continental crust?
Subduction occurs.
Where are composite volcanoes found in the United States? Name one place.
Mount Fuji
Mt. Hood
Mt. Saint Helens
Mt. Rainer
This type of volcano is built by alternating layers of lava flows and ash flows. It can be very explosive. What type of volcano is this?
Composite volcano
The weak point in the Earth's crust where hot magma rises and reaches the Earth's surface is called the ?
Main Vent
What is the subduction zone?
When an oceanic crust slides under another oceanic crust.
Both magma and lava are molten rock. What are their differences?
Magma is found under Earth's surface and lava is found above Earth's surface.