Continental drift
Who first found evidence for continental drift?
alfred wegner
what are fossils
Remains of plants or animals
What is an example of a plate boundary?
convergent/divergent/transform
What boundary creates folded mountains?
convergent boundary
what is the difference between mechanical and compositional layers?
mechanical layers are separated for their density and state of matter
What was the supercontinent called
what can we learn by looking at fossils?
the environment that a creature lived in, the diet of the creature, and how it looked
what activity happens at a transform boundary?
earthquakes
what is a rift valley?
when continental meets oceanic crust in a convergent boundary
what is the densest layer?
inner core
what is continental drift
the theory that the continents move
what can looking at the sediment layers a fossil is in tell us?
how old the fossil is
what happens to less dense plate at a convergent boundary?
subduction
what boundary creates a mid-ocean rift?
(ex: continental><Continental)
oceanic<>oceanic
why is the inner core solid?
because of the pressure put on it
what layer of the earth causes continental drift?
Mantle
if a man finds aquatic fossils in the desert, what does that tell us about the desert's past?
it was once an ocean
what plate boundary pushes at each other?
convergent
what does subduction cause?
ocean trench
what is the thinnest layer?
crust
What layer do tectonic plates "float" on that lets them move
asthenosphere
if a scientist finds avian (bird) fossils at the bottom of an ocean, what can that tell us about the ocean's past?
it was once on land and not submerged
why is new crust created?
seafloor spreading at a divergent boundary
what plate boundary creates folded mountains?
convergent
what is the thickest layer?
mantle