Layers of the Earth
The ___________ is the outmost solid, brittle layer
Crust
Name the scientist that proposed the theory of continental drift
Alfred Wegener
What is the name of the theory that explains how large pieces of the Earth's outermost layer move and interact?
Theory of Plate Tectonics
Mid-ocean ridge
Theory explains the why/what (chose one)
WHY
The _________ is the largest layer.
Mantle
What is the name of the supercontinet that scientists believe existed 250 million years ago.
Pangea
A divergent bounday is where two plates are doing what?
Moving away from each other
Why does oceanic crust sink beneath the continental crust at a subduction zone?
It has a greater density
Law explains the why/what
WHAT
Outer layer made up of the crust and top part of the mantle.
lithosphere
What piece of evidence about the shape of continents today suggests that the continents were once joined?
Continents today look like they fit together like puzzle pieces
Which feature is most likely created by two convergent boundaries colliding?
A large mountain range
What is the most likely cause of an earthquake?
A transform boundary
Theory
Solid, metallic layer at the center, more dense and composed of mostly iron
Core
Fossils of animals that could not have swam or flown have been found on different continents
What is the main geologic event that happens along the boundary of a fault line
An Earthquake
Heat from the Earth's inerior is transferred to the crust by:
Convection in the mantle
Skepticism results in____________
more questions, research, and theories
Where Convection currents are found
Mantle
Evidence of ancient glaciers (deep scratches) have been found in warm regions. What does this suggest?
That these regions were once located closer to colder areas before they drifted to where they are today.
The area where one plate sinks beneath another plate is called a
subduction zone
It is located at the boundaries of tectonic plates
The theory of plate tectonics explains the causes and processes of how continents move. This theory is supported by what about?
vast amounts of evidence, such as fossil records, seafloor spreading, and the continents looking like they fit together like a giant puzzle