Earth's Layers
This is the most dense layer of the Earth
Inner Core
What are the 5 types of fossils we discussed in class?
Tar, Resin, Molds and Casts, Trace, Carbonization
Rock layers form horizontally, the youngest at the top, oldest at the bottom is which Geologic law?
Law of Superposition
This person developed the theory of continental drift and Pangea
Alfred Wegener
This landform erupts and spews lava
Volcanos
This layer is the ground we walk on and is made up by landforms like mountains, trenches, valleys, and volcanoes.
Continental Crust
Fossilized dung or feces
Which rocks are youngest in the law of crosscutting?
The rocks diagonally cutting across the rock layers
Name 3 pieces of evidence for Pangea's existence
Fossils, landforms, puzzle pieces.
Landmasses like the Himalayan mountains are created by this type of plate boundary
Convergent
This layer produces convection currents which cause continental drift.
Mantle
Tree sap solidifying into amber around an organism.
What are the 3 characteristics of index fossils?
abundance, short lived, widespread
What two continents appear to fit together like puzzle pieces, which explain Pangea.
South America and Africa
Divergent boundaries can create these two landforms
Rift valleys and mid-ocean ridges
The order of the layers from most dense to least dense is...
Index fossils are important because they...
Allow paleontologists to study the age of an organism.
The exact date of a rock layer is its
Absolute date
Pangea was known as this type of continent
Super Continent
The Marianas trench is located in the
Western Pacific Ocean
This layer is the hottest of all of the Earth's layers.
Study fossil remains to understand different aspects of extinct and living organisms
Half of the radioactive atoms have decayed to form stable daughter products, and 50% of the radioactive atoms remain defines this term
Continental drift is a theory that...
The continents are moving at a very slow pace. or Pangea
This zone is created when a oceanic and continental crust converge, and the oceanic crust folds into the mantle
Subduction Zone