PTK and IPS


From: lindgren@meol.mass.edu (Charles F. Lindgren)
Subject: PTK and IPS
Date: Fri, 8 Nov 1996 15:55:20 -0500


I teach a combination of earth and physical science classes. My Physical
Science is an "Honors" level I.P.S. 8th Grade Program with VERY talented
kids. I MUST cover Chapters 1-5 in a year with these kids, and those of you
familiar with the course know what that means. I'm trying to adapt as many
of the labs as possible to a PTK format. If anyone would care to share
ideas with me or just shoot the breeze on how we can adapt the two programs
I'd be greatful. Shown below is how I've modified the Volume of a granular
solid  (Exp. 2.3) to fit both curriculums.

************

NAMES ___________________________

___________________________

GROUP # ______

Experiment 2.3 - Measuring Volume By Displacement of Water

Many of you mentioned that you would bring a sieve, strainer, or simply a
container to collect a sand sample  at our mystery site in January. What
information are you going to send to the other Passport to Knowledge
participants? Obviously quantitative data would be very important. What
characteristics exist in sand that can be measured? One very telling
statistic is the volume of air spaces found in sand.  Find the volume of a
minimum of one sand sample, if at all possible do two. BE SURE TO USE
LABELS FOR ALL MEASUREMENTS!!!! ALL VOLUMES MUST BE IN cm3 or ml.


TRIAL #1                                       TRIAL #2

   Vol. of Dry Sand = ________           Vol. of Dry Sand = _________

   PUT THE SAND BACK!!!!!                      PUT THE SAND BACK!!!!!!!

   Vol. of Water = _______                   Vol. of Water = _______

   OK, ADD THE SAND AGAIN              OK, ADD THE SAND AGAIN

   Vol. of Sand & Water =  _______      Vol. of Sand & Water =  _______

   Vol. of Sand = _______                    Vol. of Sand = _______

   Vol. of Air = _______                        Vol. of Air = _______

   % of Air In Sand = _______              % of Air In Sand = _______



What do you think the volume of air in sand tells you about the sand? Why?