Category 1
The shaking that results from the movement of rock beneath Earth's surface.
Earthquake
A plate boundary where two plates move away from each other.
Divergent Boundary
The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
Subduction
The size or extent to which something occurs.
Scale
A plate boundary where two plates move toward each other.
Convergent Boundary
A plate boundary where two plates move past each other in opposite directions
Transform Boundary
The process by which molten material adds new oceanic crust to the ocean floor.
Sea-Floor Spreading
Describes something that is made of a mixture of different parts or elements.
Composite
An undersea valley that represents one of the deepest parts of the ocean.
Ocean Trench
An undersea mountain chain where new ocean floor is produced; a divergent plate boundary under the ocean.
Mid-Ocean Ridge
A giant wave usually caused by an earthquake beneath the ocean floor.
Tsunami
A break in Earth's crust along which rocks move.
Fault
An area where magma from deep within the mantle melts through the crust above it.
Hot Spot
A force that acts on a rock to change its shape or volume.
Stress
Liquid magma that reaches the surface.
Lava
Stress that squeezes rock until it folds or breaks.
Compression
A molten mixture of rock-forming substances, gases, and water from the mantle.
Magma
Stress that pushes masses of rock in opposite directions, in a sideways movement.
Shearing
The measurement of an earthquake's strength based on seismic waves and movement along faults.
Magnitude
Stress that stretches rock so that it becomes thinner in the middle.
Tension
What is a Hypothesis?
An evidence-based idea that can be tested by experimentation or investigation.
What is the difference between active, dormant, and extinct volcanoes?
Active is a working volcano. Dormant volcanoes are not currently active but could become active in the future. Extinct volcanoes are no longer active and are very unlikely to ever erupt again.
What are two devices that scientists can use to measure volcanic eruptions?
Seismographs and Tiltmeters.
They can also help predict eruptions by monitoring the gas emissions coming from the volcano.
When oceanic crust slides under continental crust this process is called ______________________.
Subduction
This place in California is located on a major fault and experiences many earthquakes. There is also a movie about it that involves natural disasters. What place is it?
San Andreas