All Stressed Out
The type of geologic stress that pulls apart rock, streching it until it breaks.
What is tension.
An undersea mountain chain where new ocean floor is produced; a divergent plate boundary under the ocean.
What is a Mid-ocean ridge?
Tectonic plates that move toward each other.
What are converging plates?
What are divergent continental plates?
The first of the seismic waves to come from the focus to the earth's surface.
What are Primary waves. or P-waves?
The type of geologic stress that squeezes rock until it folds and breaks.
What is compression.
The downward movement of the edge of a tectonic plate into the mantle, beneath another plate.
What is subduction?
Tectonic plates that move away from each other.
What are divergent plates?
The San Andreas fault is a good example of this kind of plate movement.
What is transform plate movement?
These siesmic waves are the slowest but casue the most damage.
What are surface waves?
The type of geologic stress that tears rock apart like ripping paper.
What is shearing.
The vibrations that travel through Earth carrying the energy released during an earthquake.
What are seismic waves?
Tectonic plate boundaries that slide past each other.
What are transform boundaries?
Subduction, trenches, volcanic mountains, and volcanic archipelagos are all created from this type of plate movement.
What is convergent plate movement?
This is the point directly above the focus on the Earth's surface.
What is the epicenter?
These are the breaks within the rock due to stress.
What are faults.
Movements within Earth's mantle that causes tectonic plates to collide, separate, or slide past each other.
What are convection Currents?
The scientist who showed evidence that the continents are in motion (continental drift).
Who is Alfred Wegener?
The region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur.
What is the Ring of Fire?
The Hawaiian Islands are made from this type of volcano.
What is a hot spot?
What is along plate boundaries.
This instrument measures and records earthquake magnitude based on the energy released in an earthquake.
What is a seismometer or seismograph?
What evidence was Wegener missing that was later discovered that proved his theory.
What is seafloor spreading, or how the continents were moving.
These are the two main types of tectonic plates.
What are continental and oceanic?
This is the superheated gas and ash that is produced from a volcanic eruption, AND what is created when a volcano erupts that has a liot of ice or water on it.
What are Pyroclastic flows & Lahars?