Volcanoes 1
Rocks formed from cooling lava...
(Igneous, sedimentary, or metamorphic)
Igneous
Molten or liquid rock beneath the Earth's surface is called this...
Magma
Used to measure the size of waves in a earthquake...
Seismograph
A modern scale, compared to the Richter scale that measures earthquakes...
Moment Magnitude Scale
Type of earthquake (most common) that occurs when the Earth's crust breaks due to the movement of tectonic plates...
Tectonic Earthquake
Volcanoes can be either active, dormant, or....
extinct
Molten rock that flows out of a volcano is called this...
Small earthquake shocks before a large earthquake...
Foreshock
How long do earthquakes typically last...
less than 1 minute
Earthquake shocks that happen after the main shock...
Aftershock
Volcanoes are generally located where the Earth's tectonic plates and where one plate subducts under the Earth's crust..this type of plate boundary is called...
Convergent plates
During a volcano, magma forces its way up through cracks in the Earth's crust called...
Fissures
(Convergent, Divergent, or Transform)
Transform
The waves that travel through the Earth's crust are called this...
Seismic waves
Earth's surface (top layer) is called the....
Crust
Lava can reach this temperature....
2,000 degrees Celsius
The core
Tsunami
The area below the Earth's surface where the earthquake originates...
focus
Which type of seismic waves arrive first after an earthquake...
P waves
Shield volcanoes form flat, wide layers of lava eventually forming...
Mountains
Over half of the world's volcanoes are here in the Pacific ocean region and is called the...
Ring of Fire
The energy from a volcano can subsequently form...
The area above ground directly above the focus...
epicenter
How many major plates are constantly moving on Earth's surface...
7