7. what is the asthenosphere, and why is it important for plate movement?\n8. match the boundary with the…

7. what is the asthenosphere, and why is it important for plate movement?\n8. match the boundary with the correct description:\na. convergent boundary\nb. divergent boundary\nc. transform boundary\n _ plates slide past each other\n _ plates move apart and new crust forms\n _ plates collide, and one may sink beneath the other\n9. what type of boundary created the himalayan mountains?\n10. what type of boundary created the mid - atlantic ridge?\npart c: critical thinking\n13. how does heat transfer in the mantle (convection currents) cause tectonic plates to move?\n14. if tectonic plates stopped moving, how would earths surface change over millions of years?\n15. imagine you are standing near a transform boundary. what natural disaster might you experience, and why?\nremember:\n- name the 7 tectonic plates in order\n- what is the mnemonic device your class came up with to remember the plates.

7. what is the asthenosphere, and why is it important for plate movement?\n8. match the boundary with the correct description:\na. convergent boundary\nb. divergent boundary\nc. transform boundary\n _ plates slide past each other\n _ plates move apart and new crust forms\n _ plates collide, and one may sink beneath the other\n9. what type of boundary created the himalayan mountains?\n10. what type of boundary created the mid - atlantic ridge?\npart c: critical thinking\n13. how does heat transfer in the mantle (convection currents) cause tectonic plates to move?\n14. if tectonic plates stopped moving, how would earths surface change over millions of years?\n15. imagine you are standing near a transform boundary. what natural disaster might you experience, and why?\nremember:\n- name the 7 tectonic plates in order\n- what is the mnemonic device your class came up with to remember the plates.

Answer

Brief Explanations:

  1. The asthenosphere is a semi - molten layer in the upper mantle. It's important for plate movement as its plasticity allows tectonic plates to move over it.
  2. c. Plates slide past each other at transform boundaries. b. Plates move apart and new crust forms at divergent boundaries. a. Plates collide, and one may sink beneath the other at convergent boundaries.
  3. The Himalayan Mountains were created by a convergent boundary where the Indian and Eurasian plates collided.
  4. The Mid - Atlantic Ridge was created by a divergent boundary where the North American and Eurasian plates (and South American and African plates in the south) are moving apart.
  5. Heat transfer in the mantle through convection currents causes tectonic plates to move. Hot, less - dense material rises, cools, becomes denser, and sinks, creating a circular motion that drags the overlying tectonic plates.
  6. If tectonic plates stopped moving, there would be no new mountain formation from plate collisions, fewer volcanic eruptions, and reduced earthquake activity. The Earth's surface would become more geologically stable and erode over time.
  7. Near a transform boundary, one might experience an earthquake. This is because stress builds up as the plates slide past each other, and when the stress is released, it causes seismic activity. Remember:
  • The seven major tectonic plates are the Pacific Plate, North American Plate, Eurasian Plate, African Plate, Antarctic Plate, Indo - Australian Plate, and South American Plate.
  • Mnemonic devices vary by class, but an example could be "People Never Eat African Ants In South America" to remember the first letters of the plates.

Answer:

  1. The asthenosphere is a semi - molten layer in the upper mantle. Its plasticity enables plate movement.
  2. c. Plates slide past each other b. Plates move apart and new crust forms a. Plates collide, and one may sink beneath the other
  3. Convergent boundary
  4. Divergent boundary
  5. Convection currents in the mantle create circular motion that drags plates.
  6. Reduced geological activity, more erosion.
  7. Earthquake due to stress release as plates slide. Remember:
  • Pacific Plate, North American Plate, Eurasian Plate, African Plate, Antarctic Plate, Indo - Australian Plate, South American Plate
  • Varies by class (example: "People Never Eat African Ants In South America")