What is the name of the most recent supercontinent (when all of the continents were together)?
laurasia
pangaea
gondwana
eurasia
the himalayan mountains are forming at
a continent-ocean convergent boundary
an ocean-ocean convergent boundary
a continent-continent convergent boundary
a divergent boundary
a transform boundary
the cascade range volcanoes formed at
a continent-ocean convergent boundary
an ocean-ocean convergent boundary
a continent-continent convergent boundary
a divergent boundary
a transform boundary
the san andreas fault is forming at
a continent-ocean convergent boundary
an ocean-ocean convergent boundary
a continent-continent convergent boundary
a divergent boundary
a transform boundary
the mid-oceanic ridge is forming at
a continent-ocean convergent boundary
an ocean-ocean convergent boundary
a continent-continent convergent boundary
a divergent boundary
a transform boundary
proposed the idea of continental drift in the early 1900s.
alfred wegener
fred vine
james hutton
harry hess
what is the evidence for seafloor spreading? (circle all that apply)
seafloor sediment becomes thicker as you travel away from a ridge (rift zone)
there are younger rocks at the ocean ridges compared to rocks away from the ridges.
seafloor sediment does not become thicker or thinner as you travel away from a ridge (rift zone)
magnetic field reversals recorded in rocks show matching zebra patterns on both sides of a ridge.
most volcanoes and earthquakes occur
at or near plate boundaries
in the middle of tectonic plates
in the atlantic ocean
close to california
harry hess’s main contribution to the seafloor spreading hypothesis was the proposal of
mantle contraction
hot spots
convergent boundaries
mantle convection
which if the following was not cited in 1912 as evidence for continental drift?
distribution of fossil plants in the southern continents
distribution of glaciations in the southern continents
distribution of trenches and ridges worldwide
distribution of similar mountains ranges on many continents
yellowstone and hawaii reflect the effects of
hot spots (mantle plumes)
trenches
rifts
convergence