p t Flashcards
outer layer of the earth that has the crust upper part of the mantle
Lithosphere
soft layer of the mantle were the t plates move
Asthenosphere
strong part of the mantle be between the asthenosphere and outer core
Mesosphere
solid dense center of earth
Inner Core
the liquid part of the core
Outer Core
an elastic wave in the earth produced by an earthquake or other means
Seismic Waves
the relatively thin part of the earth’s crust which underlies the ocean basins
Oceanic Crust
the relatively thick part of the earth’s crust that forms the large landmasses
Continental Crust
the degree of compactness of a substance
Density
thought of Pangaea
Alfred Wegener
that the continents broke a part from one land mass.
Continental Drift
is a type of boundary where two plates meet together and start to push against one another
Convergent Boundary
divergent boundary or divergent plate boundary
Divergent Boundary
Plate Boundaries are locations where two plates slide past one another
Transform Boundary
the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side
Sea-floor Spreading
were the continent broke from
Pangaea
When Pangaea broke up
Laurasia
ancient supercontinent that broke up about 180 million years ago
Gondwana
is an extinct genus of reptile from the Early Permian of southern Africa and South America
Mesosaurus
is the largest and best-known genus of the extinct order of seed ferns
Glossopteris
