n \"The Discovery of Sea floor Spreading & Plate Tectonies\" and answer the foll
ID: 152455 • Letter: N
Question
n "The Discovery of Sea floor Spreading & Plate Tectonies" and answer the following: a. What did scientists discover at the bottom of the Atlantic Ocean in 1953 and what type of readings were they taking when they discovered it? discovev la,ooo mile long mouh tain range What did Harry Hess discover about the age of the Atlantic sea floor while analyzing core samples and sonar readings? What did he call his discovery? b. What is subduction? And where does it occur, at trenches or mid ocean ridges? (Hint: We learned about this in class) c. d. At what rate (speed) do the earth's large, interconnected plates move? (Hint: It is compared to the growth of a body part) What is currently happening to the size of the Pacific Ocean and the size of the Atlantic Ocean? Explain why this is happening by explaining which ocean is experiencing more subduction and which one is experiencing less? e.
Explanation / Answer
a) Mainly ocean bottom is very assymetrical .It contains trench .flat topped hill guoyts and ridges,
b)Henry hess a geologist did research to know the enemy ssubmarine.on this he discovered there is addition of new material ot the sea and leads to moving away the far part from the creation zone.The younger part is close to centerand gradually older.
c)subduction is a tectonic process by which one denser plate subducts below the lighter one due to tension.It occur on trenches .
d)Mainly the earth plates movea at a rate of 2-4 cm per year but there are instances where they move 15cm/year in East pacific rise .
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