Department
of Earth Science |
Northeastern
Illinois University
INTRODUCTION
TO EARTH SCIENCE
ESCI 121
Section 05
Spring 2009
Daily
Objectives #8
(February 10, 2009)
Dr. Sanders
By the end of today's class, you should be able to do the following:
►
Watch footage of Asama erupting! ►
More footage of the
volcano is on this YouTube video.
► An Asama webcam is here.
(Note: it often doesn't load.) ►
Keep
track of what's happening with the Alaska volcano, Mt. Redoubt.
Minerals
w Review: List and explain the mineral properties
most commonly used to describe/identify minerals:
▫ hardness
▫ luster
▫ color
▫ cleavage ▫
specific gravity (density)
▫ streak
▫ taste
▫ magnetism ▫ reaction with acid
(effervescence or odor)
w Review: Demonstrate that you can test an unknown
mineral sample for each the mineral properties above, and use a mineral key to
identify an unknown sample.
New this time
w Define
mineral cleavage.
w Describe
mineral cleavage (Beware! There is
an error on this page!) in terms of
how many
planes of cleavage occur and at what angles.
w Recognize
stair-step or stepped cleavage. The
third diagram
on this page shows how it occurs. While you're here, take a look at
the short videos part-way down the page.Rock
Your State! In-class work
w Working
with 2-3 others, make a list of all the kinds of rocks and sediments found in
the states you researched.
w Create a
master list (using sticky notes) of all the rocks/sediments represented for all
the states in your group.
w For each
item on the list, categorize it as a sediment, igneous rock,
sedimentary rock, or metamorphic rock.
w For each
type of rock (ig, sed, meta), subdivide the group into smaller classifications.
w Put each
kind of rock into its classification.
w
For sediments, organize the
materials according to some logical principle (what is it?)
© 2009 Laura L. Sanders. Last updated February 10, 2009.