Layers of Earth
The innermost layer of Earth.
What is the inner core?
A rock formed by the melting and cooling of lava.
What is Igneous Rock?
When two plates move towards each other and collide.
What is Convergent Boundary?
Alfred Wegener's theory that all the continents were once together as a supercontinent.
What is the Continental Drift Theory?
This change happens when two continental crusts converge and push upward.
What is mountain ranges?
The outermost, thinnest layer of Earth.
What is the Crust?
A rock formed by smaller pieces of rock compacting and cementing together.
What is Sedimentary Rock?
When two plates move away from each other.
What is divergent boundary?
The name of the supercontinent that existed over 200 million years ago.
What is Pangaea?
Slow or rapid change: Mountain Building
What is slow change?
The layer where hot melted rock rises to the top sink back towards the core as it cools.
What is the mantle?
A rock formed as it's pushed down into the Earth and changes with extreme heat and pressure.
What is metamorphic rock?
When two plates slide past each other creating a fault line.
What is Transform Boundary?
Name 2 evidences that scientists used to prove the continents used to be together.
What is similar fossils and rocks found on different continents?
Slow or rapid change: Earthquakes
What is slow change?
The layer that includes the crust and the upper mantle.
What is the lithosphere?
A process that changes igneous rock to metamorphic rock.
What is extreme heat and pressure?
Mary pushes wet graham crackers together to create folded mountains and this type of boundary.
What is convergent boundary?
True or False: The theory of plate tectonics is considered a theory because it's based on observations of the natural world.
TRUE
This change occurs when two plates undergo subduction.
Volcanoes or mountains
The hot, solid layer with the highest density.
What is the inner core?
Small pieces of rock created by the weathering and erosion of land.
What is the sediments?
This type of convergent boundary pushes one crust under the other creating volcanoes and earthquakes.
What is subduction?
The evidence Alfred Wegener was missing to prove continental drift.
What is he did not have evidence of the plate tectonic movement?
This is when oceanic crusts diverge making new rock in the middle and older rock as it continues to split.
What is sea-floor spreading?