1.- Plate tectonics: Evidence of plate movement

Description

https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/plate-tectonics-evidence-of-plate-movement
PEDRO ALVAREZ JIMENEZ
Quiz by PEDRO ALVAREZ JIMENEZ, updated more than 1 year ago
PEDRO ALVAREZ JIMENEZ
Created by PEDRO ALVAREZ JIMENEZ about 9 years ago
185
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Resource summary

Question 1

Question
Which 2 continents could fit into each other?
Answer
  • Antarctica and Asia
  • Africa and South America
  • Europe and Asia

Question 2

Question
Why do we use the alignment of magnetic rocks to know how old a plate is?
Answer
  • The older rock that's aligned with our current magnetic field
  • The newer rock that's aligned with our ancient magnetic field
  • The newer rock that's aligned with our current magnetic field

Question 3

Question
If you look at magnetite which is close to the mid-ocean ridge. What do you expect about its alignment?
Answer
  • They're aligned in a way that you would expect with the current magnetic field
  • They're aligned in a way that you would not expect with the current magnetic field
  • They're aligned in a way that you would expect with the ancient magnetic field

Question 4

Question
And what about if magnetite is further?
Answer
  • You have circles of other magnetic rock that is going in the opposite direction
  • You have stripes of other magmatic rock that is going in the same direction
  • You have stripes of other magnetic rock that is going in the opposite direction

Question 5

Question
Why this magnetic stripes pattern is an evidence of plate movement?
Answer
  • Wegener discovered them
  • The rift has had to move apart
  • Magnetic stripes change throughout time

Question 6

Question
In present times, What system do we use to measure the plate movement?,
Answer
  • Lageos
  • Computer monitoring
  • GPS satellites

Question 7

Question
Could you compare this speed to any biological process?
Answer
  • The speed at which hair grows
  • The speed at which fingernails grow
  • The speed at which fbones grow
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