LATEST VERIFIED UPDATE: ESS 101 A+ QUESTIONS AND
ANSWERS.
Which seismic wave shadow zone occurs at an angular distance > 105 degrees of
the earthquake epicenter?
S-wave
Which seismic waves are shown on the seismogram measured at the
seismograph station located at an angular distance of 155 degrees from the
earthquake epicenter?
Surface wave shadow zone
What seismic evidence do seismologists use to indicate that the asthenosphere
is only partially melted?
P-waves decelerate in the asthenosphere, while the S-waves are absorbed in the
asthenosphere
Which volcanic gas was not added to the earth's atmosphere during early
differentiation of the planet?
O2
The lava composition of Mt. St. Helens is _______ and it tends to be more
________ than lavas erupted from Mt. St. Rainier?
Dacite, silica-rich
The Olympic and Coast Mountains are composed of
marine sedimentary rock scraped off from the ocean floor during subduction
Which of the following plate motions would not likely occur in the future?
The Isthmus of Panama will close and the Gulf stream current will be diverted northward
to Europe
The rock shown in the image below has a
porphyritic texture
Which mineral crystallized first?
Small black mineral included within white mineral
Divergent margins typically originate under continents because
ANSWERS.
Which seismic wave shadow zone occurs at an angular distance > 105 degrees of
the earthquake epicenter?
S-wave
Which seismic waves are shown on the seismogram measured at the
seismograph station located at an angular distance of 155 degrees from the
earthquake epicenter?
Surface wave shadow zone
What seismic evidence do seismologists use to indicate that the asthenosphere
is only partially melted?
P-waves decelerate in the asthenosphere, while the S-waves are absorbed in the
asthenosphere
Which volcanic gas was not added to the earth's atmosphere during early
differentiation of the planet?
O2
The lava composition of Mt. St. Helens is _______ and it tends to be more
________ than lavas erupted from Mt. St. Rainier?
Dacite, silica-rich
The Olympic and Coast Mountains are composed of
marine sedimentary rock scraped off from the ocean floor during subduction
Which of the following plate motions would not likely occur in the future?
The Isthmus of Panama will close and the Gulf stream current will be diverted northward
to Europe
The rock shown in the image below has a
porphyritic texture
Which mineral crystallized first?
Small black mineral included within white mineral
Divergent margins typically originate under continents because
