Back to forum
Verbal·Expression of Ideas·Rhetorical Synthesis
medium
While researching a topic, a student has taken the following notes:
  • A student has taken the following notes:
  • A team of researchers led by Guanning Pang discovered that inactive volcanoes in the Cascade Range have large underground magma chambers 3 to 9 miles below their surface.
  • Some of these volcanoes have been dormant for thousands of years.
  • Researchers detected magma by tracking earthquake waves that slowed down when passing through chambers of magma consisting of 3% to 32% melted rock.
  • Magma chambers need over 35% liquid rock to potentially erupt.
  • These findings challenge the scientific theory that magma chambers only exist right before eruptions.
  • The discovery could improve volcano monitoring and eruption prediction methods.
A student wants to undermine a scientific assumption about magma chambers. Which choice most effectively uses relevant information from the notes to accomplish this goal?
A
Scientists found inactive Cascade Range volcanoes with large magma chambers below their surface, challenging the theory that magma chambers only exist right before eruptions.
B
Magma chambers need over 35% liquid rock to potentially erupt, refuting the assumption that volcanoes dormant for thousands of years have melted rock below.
C
Researchers detected magma chambers by tracking earthquake waves through partially melted rock, improving volcano monitoring and eruption prediction methods for dormant volcanoes.
D
By tracking earthquake waves, Pang found that magma reservoirs sit 3 to 9 miles below the Cascade Range volcanoes’ surface and need over 35% liquid magma to potentially erupt.