Plate boundaries
What does a divergent plate boundary do?
Separates from each other.
What is molten rock that flows under Earth's surface called?
Magma
What is it called when a volcano isn't on a plate boundary
Hot spot
What are tiny particles that emit from volcanoes during an eruption?
Ash
What is the device used to measure ground movement?
Seismometer
What is the function of convergent plate boundaries?
Collide/subduct
Where do volcanoes typically form?
Tectonic plate boundaries.
What is the nickname for primary and secondary waves?
P/S wave
Name one scale used to measure earthquakes.
Richter, moment magnitude, modified mercalli
True or false: Movement in faults can't cause earthquakes
False
What is the purpose of transform plate boundaries?
Slide/rub against each other.
Where are most volcanoes located?
Ring of fire
What main element changes the viscosity of magma?
Silica
What was the highest magnitude of an earthquake recorded?
9.5
What is the origin point of an earthquake called?
Focus
What layer of Earth is the breaking of tectonic plates?
Lithosphere.
What is the tallest freestanding volcano?
Mt. Kilimanjaro
What is the slowest form of seismic wave?
Surface waves
Roughly how many Volcanoes erupt per year?
60
What is it called when force applied to a rock causes it to change?
Rock deformation
Name one of the three main forces that causes plate motion.
Basal drag, Ridge push, and Slab pull.
What is one of the main types of volcanoes?
Shield, composite, cinder cone
What is the space directly above the focus called?
Epicenter
Approximately how many active volcanoes are in the US
169
Name one type of fault.
Normal, reverse, strike-slip