Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121
Fall 2006

Daily Objectives #12  (October 5, 2006)                                                                        Dr. Sanders

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


Review:

*  Describe what is meant by the following terms used to describe mineral properties

     q hardness     q luster     q streak     q cleavage     q specific gravity     q color     q solubility     q odor


New Today:

*  Sort and classify samples of igenous rocks.

*  Use simple laboratory tools (dissecting needle, copper penny, hand lens, scratch plate, streak plate) to investigate the properties of common igneous rock-forming minerals.

*  Use a mineral identification key to identify hand samples of common igneous rock-forming minerals.

*  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.

Don't forget the homework that was assigned last time and is due Tuesday:  Get it by visiting the page for our course syllabus and clicking on "Homework" in the yellow box near the top of the page. 

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated October 5, 2006.