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;
22 Cards in this Set
- Front
- Back
Volcano |
vent and the pile of volcanic material around the vent
|
|
Vent
|
opening from which lava flows
|
|
Crater
|
funnel-shaped pit at the top of a volcanic cone
|
|
Quiet Eruption
|
lava flows gently to the surface. It spreads out and forms a large mountain.
|
|
Explosive Eruption
|
volcanos formed by explosive eruptions have steep sides and narrow bases. Cinder cones
|
|
Dormant
|
a volcano is said to be " sleeping"
|
|
Extinct
|
is not expected to erupt anymore.
|
|
Composite Cone
|
both quiet and explosive eruptions occur in the same volcano. During quiet, lava forms a wide base. Explosive, adds a layer of dust, ash, and rock particles. Very high cone, steep sides wide edges.
|
|
Shield Cone
|
gentle slopes
|
|
Magma
|
the molten mixture of rock forming substance, gases and water from the mantle
|
|
Hot Spot
|
an area where magma from deep within the mantle melts through the crust above it. Random, thin crust
|
|
Volcanoes form
|
at plate boundaries |
|
Diverge
|
to pull apart |
|
Converge
|
to pull together |
|
Caldera
|
created by the collapse of a volcanoes magma chamber
|
|
Viscosity
|
the resistance of a liquid to flow
|
|
Tsunami |
triggered by earthquakes on ocean floor
|
|
Active
|
a volcano that is showing signs that it may erupt in the future
|
|
Magma Chamber |
underground pocket of magma under a volcanoes pipe
|
|
Bomb
|
largest of the lava rock fragments
|
|
Lava
|
melted igneous rock on earths surface
|
|
Ash
|
smallest of the lava rock fragments
|