volcano's
what volcano is Broad, gently slopping dome built from fluid lava that flows easily over large distance
shield volcanoes
which boundary is where two plates push towards each other
convergent
what is seismic waves
when an earthquake occurs energy radiates outwards from the focus in all directions as seismic waves
which is the layers with hard grid outermost layer
(ocean 5 km thick)
crust
what is magma
melted rock located underground inside the earth
where do volcanoes form
most volcanoes form at plate boundaries where magma can break through
what a collision zone
where two continents plates collide
what do you do when a earthquake happens
stop, drop,cover
what the lithosphere
where the crust plus the solid top part upper part
what is it when layer of sediments are squeezed together by the weight of material above them
compaction
what are hot spot volcanoes
hot spot volcanoes are volcanoes that form in the middle of tectonics plates ( different form boundary volcanoes)
what is it called when a deep valley that forms when a ocean plate sinks under a continental plate at a Subduction zone
trench
what is it when the crust slides sideways ( horizontal) two side grind past each other
strike-skip fault
what continental crust
under the continent the solid layer of rock that makes up earth
what is cementation
where minerals dissolved in water glue sediment particles together forming sedimentry rocks
why are most volcanoes in the pacific ocean
it because there is subduction zone and divergent boundaries exactly the condition that causes volcano activity
where is it when a dropped zone where two tectonic plates are pulling apart the ground sinks in the gap
Rift
what is reverse fault
crust in squeezed together one block pushed up over the others
what is asthenosphere
a hot semi-liquid zone in the upper mantle it is directly below lithosphere
what a non-renewable resource
a resource that cannot be replaced fast enough onced again
what happens in volcano winter
when a massive eruption ejects ash and sulfur dioxide into the stratosphere
what a tsunami
a huge ocean wave caused by a sudden powerful shift on the ocean floor
where is epicenter located
on the surface ( the point on Earth's surface directly above the focus)
what is pangaea
where two joined in one supercontinent it was 255 million years ago
what is Lahar
a volcanic mudflow of ash, water and debris flowing down river valley from a volcano