Geologic Time
Plate Tectonics
V, E and W
Earth Quakes
Sun and Stars
100
What is a fossil?
preserved remains of an organism
100
Divergent boundary
Two plates moving away from each other
100
temperature
Viscosity of magma depends on silica and ....
100
P waves
What type of seismic waves arrive at the surface first?
100
Short
Will a BIG star have a long or short life?
200
What type of age does index fossils show?
Relative age
200
Rift valley
Name something that is formed at a continental/continental divergent boundary?
200
Hot spot volcano
What type of volcano are the Hawaiian islands?
200
secondary waves
What are S waves knows as?
200
Blue
What is the hottest star color?
300
What are the names of the eras on the Geologic Time Scale?
Paleozoic, Mesozoic, Cenozoic
300
Mid-ocean ridge
What is running down the middle of the Atlantic ocean?
300
plant roots, frost action, animal activity
What is one agent of mechanical weathering?
300
at the Focus
Where does an earthquake start?
300
Main Sequence
90% of the stars in the sky are what type of star?
400
Name on period in the Mesozoic era.
Triassic, Jurassic or Cretaceous
400
New ocean floor, islands, volcanoes
What is one thing formed at the mid-ocean ridge?
400
Chemical weathering
What causes a marble statue to break down over time?
400
Epicenter
What is the point called on the earth's surface directly above the focus?
400
Nebula
Where do all stars start to form?
500
How are fossils formed?
Living things die and their remains are buried by sediments
500
Convergent boundary
What type of boundary formed the Himalaya mountains?
500
Silica
What is a major ingredient in magma?
500
Convection currents in Mantle
What do geologist think move the plates?
500
Parallax
What is one way that scientist use to determine how far away a star is from the earth?
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