chapter 25.3 and 25.4 Flashcards
what is the boundary that marks the density change between layers is
study sismic waves
shadow zones
what are shadow zones
what is the
between what degree do shadow zone fail
105 to 140 d agrees
is the outer core solid or liquid
liquid
why is the outer core liquid
pressure
what makes up lithosphere
the crust
what is asthenosphere
a plastic like layer whritch earth plates move
molten, or liquid, rocks stored inside
where tectonic plates collide along subduction zones
what are two types of examples of volcanic activities divergent?111
mid Atlantic ridge
east African ridge
what is magma?
molten or liquid rock storeal inside earth
what can be mode from hot spot?
islands
where is the ring of fire?
pacific ocean
viscosity:
is measure of a fluids such as lava resistance to flow
higher viscosity runs slower lower viscosity runs fast
if magma has high viscosity will it contain more silica?
more
what is pyroelastie material?
any solid material that erupts from volcano
what is the smallest type of pyrolastic material?
bloks + bombs
what are types of gases that erupt from a volcanic?
carbon dioxide, sulfer dioxide
how are volcano classified
size shape and material that erupt
what are 3 types of volcanoes?
The volcanoes.
Shield volcanoes.
Cinder cones.
shield volcanoes are broad, flat structures composed of layer upon layer of lava flows
cinder cone volcanoes tend to be small have heights in the hundreds of meters range, and have short eruption cycles.
cinder cone volcanoes
shield
composite
