Department
of Earth Science |
Northeastern
Illinois University
INTRODUCTION TO EARTH SCIENCE
ESCI 121
Section 05
Spring 2009
Department
of Earth Science |Northeastern
Illinois University
| Volcano Redoubt (and a little on the Tonga eruption) | Flooding in North Dakota/Canada | |
|
USGS press briefing and and video montage--includes video of the
Tonga eruption on Thursday before our Spring Break time lapse video; ash USGS home page |
USGS measuring crews--videos
|
VOLCANOES
w
Review: List the geotectonic settings in which
volcanoes occur (subduction zones, divergent zones, hotspots).
w
Review: Tell why volcanoes
occur at each of these settings.
w
List the three general
shapes of volcanoes and explain why they have the forms they do.
w
Explain how viscosity of magma influences volcano shape/profile and eruptive
style, and what
determines the magma viscosity.
w
Tell what makes rock melt
in the crust and mantle settings where volcanoes occur. Describe the
process in terms of changing temperature and pressure, introduction of
"impurities" (water and sediments) into the melt, and draw a graph illustrating
these varying conditions.
w Explain
how each of the above characteristics is influenced by the geotectonic setting
of the volcano.
EARTHQUAKES
w Explain
the difference between the focus of an earthquake, and the
epicenter.
w Tell
what the term magnitude means as applied to earthquakes.
w Possible
extra credit opportunity coming soon: Describe the relationship, if there is
one, between magnitude and focus depth of earthquakes.
w Using
the earthquake maps the class produced, arrange them in meaningful groups based
on the patterns of earthquake epicenters and based on the patterns
of focal depths you observe in each. Groups for this activity:
Luz, Kristal, Manar
Abe, Brett, Yair, Jaime
Maribel, Adam, Monica, Matt S.
Carl, Reina, Matt V.
Danielle, Sarah, Salman,
Chris
Miguel, Andy, Yousef, Sev