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