4.- Plates moving due to convection in mantle

PEDRO ALVAREZ JIMENEZ
Quiz by PEDRO ALVAREZ JIMENEZ, updated more than 1 year ago
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https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/plates-moving-due-to-convection-in-mantle
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Resource summary

Question 1

Question
What happens when we warm up water in a pot?
Answer
  • More kinetic energy- less volume- less density- molecules rise up
  • More kinetic energy- more volume- less density- molecules rise up
  • More kinetic energy- less volume- more density- molecules rise up

Question 2

Question
What happens when water reaches the top of the pot?
Answer
  • Molecules cools down- more kinetic energy- less volume- more dense- falls down
  • Molecules cools down- less kinetic energy- less volume- less dense- falls down
  • Molecules cools down- less kinetic energy- less volume- more dense- falls down

Question 3

Question
What are the characteristics of the mantle that permit it to produce convection currents?
Answer
  • It is hot and elastic
  • It is a kind of mushy, spongy state
  • It is not quite liquid, but not quite solid state, kind of plastic

Question 4

Question
The part of the mantle where convection currents occur is the astenosphere
Answer
  • True
  • False

Question 5

Question
What if the mantle solidified?
Answer
  • No convection currents, no plate movement
  • No convection currents, no earthquakes
  • No convection currents, no volcanism
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