Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121
Spring 2006


Daily Objectives #10 (February 16, 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 the terms plutonic and volcanic as they apply to igneous rocks.

*  Define and describe what is meant by the terms intrusive and extrusive as they apply to igneous rocks.

*  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.

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated February 16, 2006.