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;
27 Cards in this Set
- Front
- Back
|
Magma
|
is Melted Rock found underground
|
|
|
Lava
|
is magama which riches the earth's surface
|
|
|
Mafic
|
is thin and fast moving traps low % of gas, loqw amount of silica, dark colored rocks, forms sheild con
|
|
|
Felsic
|
is thick and slow moving traps high% of gas, contains high amount of silica, light colored rocks, forms cindercones
|
|
|
active
|
erupted recently or will erupet soon
|
|
|
dormant
|
a sleeping volcano that has been quiet for a long time but may still erupt
|
|
|
tephra
|
lava in solid fragments
|
|
|
bombs
|
tephra larger than 64 mm sand ejected as a liquid
|
|
|
blocks
|
tephra larger than 64 mm and ejected as a solid
|
|
|
lapilli
|
tephra between 2 and 64 mm
|
|
|
ash
|
tephra under 2 mm
|
|
|
shield
|
volcanos w/ broad gentle slpes and built by the eruption of fluid basalt lava
|
|
|
Cinder and Scoria
|
Straight sides with steep slopes and summit crater
|
|
|
Composite and
|
Steep and conical, formed by viscous lava flows, tephra and pyroclastic
|
|
|
Stratovolcano
|
erupted recently or will erupet soon
|
|
|
extinct
|
not erupted for thousand of years and will probably not erupt
|
|
|
earthquake
|
that results frextincom the sudden movement of part of the Earth's crust shaking
|
|
|
focus
|
point inside earth where the earthquarke starts
|
|
|
epicenter
|
point on Earth's surface directly aboce the focus
|
|
|
Seismic waves
|
earth quake waves; types include p s and l waves
|
|
|
seismograph
|
instrument which measures and records seismic waves
|
|
|
seismogram
|
paper that earthquake waves are recorded on
|
|
|
seismologist
|
scientist who studies earthquakes
|
|
|
richter scale
|
scale used to determine the strength or magnitude of an earthwuake. ranges 1 to 10.
|
|
|
L waves
|
surface or long wave, travel like waves in a ocean (rolling or circulation motion) last to hit sismograph, most visable damage
|
|
|
P waves
|
primary or compressionary wave, push- pull motion, travel through solid, liquid, gases, first to hit seismograph
|
|
|
S waves
|
secondary or shear wave, side to side motion, 2nd to hit sismograph, travel only through solids
|
