Show:
Igneous Rocks
Earthquakes and plates
Volcanoes and magma
Radioactive Decay
Sedimentary Rocks
100
Form when magma cools and hardens
What are igneous rocks
100
Primary waves, Push Pull waves, Arrive first
What are P waves
100
type of volcanoes that are big and flat, they form at divergent boundaries and hotspots, they have low viscocity and are not explosive
What are shield volcanoes
100
Radioisotopes decay at a ______ rate
What is constant
100
Type of Sedimentary Rock made from once living things
What is organic
200
Igneous Rocks have crystals that are large because they cool _______
slowly
200
Plates move horizontally past one another
What is a transform boundary
200
Types of volcanoes, they are big and they form at subduction zones and convergent boundaries. They are explosive.
What are composite volcanoes
200
The time that it takes for one half of a sample of a radioisotope to decay
What is a half life
200
law stating that in undisturbed sedimentary rock layers the oldest beds are on the bottom and the youngest are on top
What is the law of superposition
300
igneous rocks that cool under the surface
intrusive
300
Where do most earthquakes occur?
Along faults
300
4 factors that determine the melting point of magma
Heat, Pressure, Water, and Depth
300
What are the three main geologic time markers
Magnetic reversal, meteor impacts, and volcanic ash beds
300
Principle that states that geologic features such as faults and igneous intrusions are younger than the rocks they cut
What is the Principle of cross-cutting relationships
400
How are igneous rocks classified?
They are classified by color and texture
400
The theory that new crust is formed at mid ocean ridges and destroyed at trenches.
What is sea floor spreading
400
Smallest and most common type of volcano. They form on convergent boundaries.
What are Cinder Cone Volcanoes
400
What type of things would contain C-14
Once living things
400
An unconformity between sedimentary rocks
What is a disconformity
500
Describe glassy, fine, and coarse
Glassy= no crystals Fine= microscopic crystals Coarse=crystals visible with out magnification
500
Describe the difference between continental and oceanic crust.
Oceanic crust is denser than continental crust, but continental crust is thicker.
500
What type of volcano would scoria be found near
Shield
500
Radioisotopes decay into stable _______
Daughter products
500
Loose sediment becomes rock by these two processes
compaction and cementation