What makes up the Outer Core?
Liquid Iron and Nickle
What makes up the Inner Core and Why?
Solid iron and Nickel; Due to the tremendous pressure
Define Divergent Boundary
Where two plates move away from each other
When do seismic waves speed up?
When they reach the bottom of the crust due to the crust being a solid
What happens when you go further into the Earth's layers?
It gets hotter, it's more dense and greater the pressure
What is the Earth's Lithosphere?
The solid, outer layer of the Earth
Define Transform Boundary
Where two plates slide past each other
When do seismic waves slow down?
When they hit the liquid outer core
How do we study the layers of the Earth?
The study of seismic waves as they travel through the Earth's interior
What makes up the Lithosphere?
The crust and the Top part of the mantle
What do transform boundaries cause?
where plates slide past each other horizontally causing earthquakes
Who proposed the Continental Drift Theory?
Alfred Wegener
What are the four layers of the Earth beginning with the interior (inside) out?
Inner core, outer core, mantle crust.
What are lithosphere plates?
The moving chunks of the lithosphere
What are seismic waves?
Waves of energy from earth quakes that travel through earth.
What does the Theory of Continental Drift state?
All the continets were once joined together in a single landmass called pangea and broke apart and drifted to their current locations
What evidence is there to support Pangaea?
continents fit together like a jigsaw puzzle
fossils of the same plants and animals found on both South America and africa
Mountains in South America line up with africa in Africa
Same rocks and minerals are found in both South America and Africa