Department of Earth Science |Northeastern Illinois University

ESCI 121
Spring 2006

Daily Objectives #11 (February 21, 2006)                                                                        Dr. Sanders

By the end of today’s class, you should be able to do the following:

*  Explain the relationship between cooling rate and crystal size.

*  Define and describe what is meant by mafic and felsic mineralogic compositions of igneous rocks.

*  Use a rock key to identify hand samples of igneous rocks.

*  List and describe four factors that determine whether or not solid rock will melt into magma.

*  List and describe the eruptive styles of volcanoes, and describe how this affects the type of volcano that forms.

*  List two factors that determine what the style of a volcanic eruption will be. 

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated February 21, 2006.