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natural

QuestionAnswer
What components make up the Earth system?
What does it mean that the Earth system evolves?
At what range of scales do Earth system interactions occur?
Which Earth system components interact during a thunderstorm?
Which Earth system components interact during an extratropical cyclone?
Why are most thunderstorms not considered natural disasters?
When does a natural process become a natural disaster?
Why is a landslide considered a natural disaster but coastal erosion usually is not?
Why does the definition of a natural disaster depend on humans?
Would a natural event be considered a disaster if no people were affected?
What is plate tectonics?
Why is plate tectonics considered a unifying theory in Earth science?
When did plate tectonics become widely accepted?
What event in 1966 helped lead to the acceptance of plate tectonics?
What theory preceded plate tectonics?
Who proposed the theory of continental drift?
In what year did Alfred Wegener propose continental drift?
What does the theory of continental drift state?
What was the scientific consensus about continents before Wegener?
What was Wegener arguing against?
What evidence comes from the fit of South America and Africa?
What fossil evidence supported continental drift?
Why did similar fossils on different continents matter?
Why did continental drift challenge existing scientific beliefs?
Why was Wegener’s theory not accepted at the time?
What key mechanism was missing from Wegener’s explanation?
Where did later evidence explaining plate movement come from?
What technology allowed scientists to map the seafloor?
Why was sonar originally developed?
What is active sonar?
How does active sonar measure distance?
What is the sender in a sonar system called?
What is the receiver in a sonar system called?
What animals use a similar process to sonar?
Which research ships used sonar to map the seafloor?
Who created the first global bathymetry map?
What is a bathymetry map?
What did bathymetry maps reveal about the seafloor?
What are mid-ocean ridges?
Approximately how long are mid-ocean ridges?
How wide can mid-ocean ridges be?
What is the average height of mid-ocean ridges above abyssal plains?
How does the height of mid-ocean ridges compare to mountains in the United States?
What deep features are found near continental margins?
Why did offshore drilling technology develop after World War II?
What research ship used deep-sea drilling for scientific study?
What are seafloor cores?
What is seafloor sediment made from?
What lies beneath seafloor sediment?
Why is sediment thickness important for determining seafloor age?
What would sediment thickness look like if the seafloor were billions of years old?
What is geochemistry?
What is geochronology?
What are isotopes?
What isotopes are used in carbon dating?
What is radioactive decay?
What is a half-life?
What is the half-life of carbon-13 as described in the lecture?
Why does carbon-12 remain constant over time?
Why can carbon dating not be used to date rocks?
What dating method is used to date rocks instead?
What major scientific mission did the Glomar Challenger complete in 1968?
What ocean was studied during this drilling transect?
What dating method was used on seafloor rocks?
How old is the seafloor near North America?
How does seafloor age change when moving toward the mid-ocean ridge?
How old are rocks at the mid-ocean ridge?
How does seafloor age change moving away from the ridge?
What symmetry is observed in seafloor ages on both sides of the ridge?
What do the age patterns of the seafloor reveal about mid-ocean ridges?
Created by: adrian124
 

 



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