Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121
Fall 2006

A reminder: Exam #2 is scheduled for Thursday, Oct. 12!

Daily Objectives #13  (October 10, 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.  (Examples used in class: sample numbers 3, 4, 5, 9, 24, 30, 31, and 45.)

*  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.

*  Describe what is meant by the terms coarse-grained and fine-grained in describing the texture of igneous rocks.

*  Use a rock key such as the one on p. 58 in your textbook to identify hand samples of igneous rocks.  (Examples used in class:  sample numbers 102, 117, 124, 130, 136, 137, 138, 139, 142, 143, 149, 152, and 157.)

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated October 10, 2006.