Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
earthquake |
The vibrations in the ground that result from movement along breaks in Earth’s lithosphere.
|
|
|
fault
|
A break in Earth’s lithosphere where one block of rock moves toward, away from, or past another.
|
|
|
seismic wave
|
Energy that travels as vibrations on and in Earth.
|
|
|
focus
|
Seismic waves originate where rocks first move along a fault.
|
|
|
epicenter
|
The location of the Earth’s surface directly above the earthquake’s focus.
|
|
|
primary wave
|
Type of waves that cause particles in the ground to move in a push-pull motion similar to a coiled spring.
|
|
|
secondary wave
|
Slower type of waves that cause particles to move up and down AND at right angles relative to the direction the wave travels.
|
|
|
surface wave
|
Type of waves that cause particles in the ground to move up and down in a rolling motion.
|
|
|
seismologist
|
Scientists that study earthquakes.
|
|
|
seismometer
|
An instrument that measures and records ground motion.
|
|
|
seismogram
|
A graphical illustration of seismic waves.
|
|
|
volcano
|
A vent in Earth’s crust through which molten rock flows.
|
|
|
magma
|
Molten rock below Earth’s surface.
|
|
|
lava
|
Molten rock that erupts onto Earth’s surface.
|
|
|
hot spot
|
Volcanoes that are not associated with plate boundaries.
|
|
|
shield volcano
|
Large volcano with gentle slopes of basaltic lava; located along divergent plate boundaries and oceanic hot spots.
|
|
|
composite volcano
|
Large, steep-sided volcano that results from explosive eruptions of andesitic and rhyolitic lavas along convergent plate boundaries.
|
|
|
cinder cone
|
Small, steep-sided volcanoes that erupt gas-rich, basaltic lavas.
|
|
|
volcanic ash
|
Tiny particles of pulverized volcanic rock and glass.
|
|
|
viscosity
|
A liquid’s resistance to flow.
|
