Volcano Overview
The Ring of Fire is located around the perimeter of the _______ ________.
Lava
Cinder Cone, Shield, Composite (Stratovolcano)
We live on this tectonic plate.
Pacific Plate
The smallest continent on planet Earth is _____________.
Australia
____% of Earth's volcanoes exist in the Ring of Fire.
>75%
______________ flows are dense, fast-moving flows of volcanic ash and hot gases.
Pyroclastic
What type of volcano formed the islands of Hawaii?
Shield
Which direction is the Pacific Plate moving: north, south, east, or west?
North
When 2 tectonic plates move away from each other (divide), this is a _______________ boundary.
divergent
Where does magma collect as it travels through the Earth's crust, before it reaches the vent of the volcano?
in magma chambers
Complete the sentence:
Viscosity is a liquid's ...
resistance to flow.
What is considered the smallest of the volcano types?
Cinder Cone
The point in the lithosphere where an earth starts is called the ______________.
Focus
Latitude lines measure the directions of _______________ and _____________.
North and South
Most volcanoes occur at _____________ boundaries, when an oceanic plate is subducted underneath a continental plate.
convergent
The volcano currently erupting on the island of Hawaii has _____ viscosity lava (*HINT*: this is a shield volcano that dome-shaped with gently-sloped sides).
Low
The cinders that fall after a Cinder Cone erupts and create the slope of the volcano are called _________.
Lapilli
The 2 plates that form the San Andreas fault are the ________ plate and ________ plate. (the order does not count as long as the names are correct!)
Pacific Plate and North America Plate
Longitude lines measure the directions of _____________ and ______________.
East and West
pyroclastic materials
__________ viscosity lava creates steep volcano slopes, and is often described as 'chunky' or slow-moving.
High
Scientists knew Mount St. Helens (a stratovolcano) was going to explode days before the eruption because a ______ _______ formed in its crater and started emitting smoke and volcanic gas.
Lave dome
During earthquakes, energy is released in all directions in the form of __________ _________.
Seismic waves
The _________________ is on the surface of the Earth directly above the focus and is where the earthquake is the strongest and where most damage occurs.
epicenter