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;
25 Cards in this Set
- Front
- Back
earthquakes sometimes cause monstrous waves called
|
tsunamis
|
|
trembling or shaking of the earth's crust
|
earthquake
|
|
a break that appears at the boundary between two moving masses of rock
|
fault
|
|
the place at ground level that is directly above the focus of an earthquake
|
epicenter
|
|
point underground where an earthquake begins
|
focus
|
|
allows molten rock and hot gases to escape from within the earth
|
volcano
|
|
created when trapped gases blast through the earth's surface
|
vent
|
|
with depth the temperature of rocks
|
increases
|
|
occurs when natural acids slowly eat into a rock, breaking it apart
|
chemical weathering
|
|
the measurement of an earthquake's strength
|
magnitude
|
|
scientists who study the structure of the earth
|
geologists
|
|
the study of earthquakes
|
seismology
|
|
the processs by which new soil is formed as rocks crumble and break into smaller pieces
|
weathering
|
|
the boundary between the earth's crust and its mantle
|
Moho or Mohorovicic discontinuity
|
|
the underwater mountain ranges
|
mid-oceanic ridges
|
|
a volcano that has been active at some time in recorded history, but not recently
|
dormant
|
|
a volcano that produces lava fountains or fire curtains
|
Hawaiian
|
|
a volcano that has not erupted in recorded history
|
extinct
|
|
a volcano that has erupted recently
|
active
|
|
a volcano characterizied by hot clouds of gas and dust that it expels
|
Plinian
|
|
magma that has reached the earth's surface
|
lava
|
|
runs along the edge of the Pacific Ocean, named for its many volcanoes
|
Ring of Fire
|
|
a depression found at the top of a volcano
|
crater
|
|
holes or cracks which serve as escape vents for underground gases
|
fumaroles
|
|
smaller fragments of molten rock that solidify almost instantly are
|
tephra
|