Layers
The layers of the Earth from outside in.
Crust, Mantle, Outer Core, Inner Core
The transfer of heat in a liquid/gas due to density differences.
Convection
Scientists believe that the tectonic plates are moved by what?
Convection Currents in the mantle.
What was the FIRST thing Wegener noticed about the continents that started the idea of Continental Drift?
Their shapes looked like they could fit together.
Describe subduction.
Subduction is when a tectonic plates is pushed under another at a convergent boundary.
Earth's mantle is...
(YOU NEED 2 CLUES FOR CORRECT ANSWER)
-The largest layer
-Plastic/semi-solid
-Contains convection currents
The transfer of heat due to direct contact of molecules.
Conduction
Name two pieces of evidence that Wegener used to prove his theory of Continental Drift
Fossil Evidence
Geological Evidence
Climate Evidence/Glacial Evidence
Continental Shape
What were all FOUR pieces of evidence that Wegener used to support his theory of Continental Drift?
Continent Shapes
Fossil Evidence
Glacial/Climate Evidence
Geological Evidence
What happens at a Transform Boundary?
(Describe the plates AND the phenomona)
Two plates slide past each other.
Earthquakes and Fault lines are a result.
Earth's inner core is...
(YOU NEED 2 CLUES FOR CORRECT ANSWER)
-A solid ball of nickel and iron.
-The hottest layer.
-The innermost layer of the Earth.
The transfer of heat through open or empty space is called...
Radiation
Any trace of an ancient organism that has been preserved in rock is called...
A fossil
Where does molten material spew out when the seafloor is spreading?
Along the Mid-Ocean Ridge
What happens at a convergent boundary?
Two plates collide head on.
Mountains, volcanoes, island arcs, trenches.
Describe what would change if you were able to travel to the center of the Earth.
The temperature would increase as you moved closer to the inner core.
The pressure would increase as the layers of the Earth weighed down above you.
What type of heat transfer moves the tectonic plates?What causes it to happen?
Convection Currents
Heat from the Inner/Outer Core.
Forces that build up the Earth's land like are called...
Constructive forces
The process by which the ocean floor sinks beneath a deep-ocean trench and melts back into the mantle is known as...
Subduction
What happens at a divergent boundary?
Two tectonic plates move away from each other.
Mid-ocean ridges and rift valleys.
Which layer contains the convection currents that move our tectonic plates?
(DOUBLE POINTS IF YOU NAME THE SUBLAYER)
The Mantle
(The ASTHENOSPHERE)
Why would they have disagreed with the idea of Convection Currents?
Scientists at the time did not know there were layers inside the Earth. Therefore, they could not have understood convection currents.
What is dihydrogen monoxide?
Water (H2O)
Plates in the ocean splitting apart creates a __-____ _____ underwater. This shows evidence of new rock near this opening.
How does rock that is closer to a mid-ocean Ridge compare to rock that is further away?
The rock closer to the mid-ocean Ridge is younger.