## Channel-Talk

To post a question or reply, you can send an email to channel-talkforce@learner.org.

# Re: [Channel-talkforce] mass and volume enrichment

From: Laurie Godfrey <lgodfrey@mac.com>
Date: Wed Mar 15 2006 - 17:22:25 EST
X-Mailer: Apple Mail (2.749)

ONe doesn't have to travel to feel less weight. For instance the
bouyant force helps one feel much lighter in water. He balloons in
our atmosphere, going over the hill on a roller coaster or even on a
country road (Ohio anyway) provides that whoa! feeling which is a
moment of weightlessness that training astronauts feel in the vomit
comet jet doing parabolas. All these "weight differences" do not
matter to one's "matter"
On Mar 15, 2006, at 2:37 PM, Cockroft, Ellafe A. wrote:

Yes, indeed!
For enrichment, while studying the solar system, you can also ask
them what happens to their mass and weight if they go to the moon or
Jupiter. As the moon's gravitational force is 1/6 that of earth,
then they would weigh less on the moon while their masses stay the same.

________________________________

From: channel-talkforce-bounces@learner.org on behalf of Stevens,
Mary K.
Sent: Tue 3/14/2006 1:46 PM
To: Discussion list for SCIENCE IN FOCUS: FORCE AND MOTION
Subject: RE: mass and volume inquiry

I love that!!! The students will enjoy the literature connection
and a clever way to make comprehension of matter fun.

________________________________

From: channel-talkforce-bounces@learner.org on behalf of Cockroft,
Ellafe A.
Sent: Mon 3/13/2006 3:11 PM
To: Discussion list for SCIENCE IN FOCUS: FORCE AND MOTION
Cc: Deresz, Donald A.
Subject: RE: mass and volume inquiry

Hi Kristen,

Tell them a story about Archimedes and King Midas' golden crown. How
he had to weigh the crown of gold and determine if the King's crown
maker was substituting inferior metal. After taking a bath, he ran
out and shouted "Eureka" as he determined that the bouyant force on a
submerged object is equal to the weight of the fluid displaced. This
method is normally used these days to determined the volume and
therefore the density of an irregular object by measuring the mass in
air and it's effective mass when submerged in water. This effective
mass when submerged in water is its actual mass minus the mass if the
fluid displaced. Mass divided by volume gives a measure of density
of the object. Archimedes found that the density of the crown was
actually less than gold, so it was "Off with his head!"

________________________________

From: channel-talkforce-bounces@learner.org on behalf of Kemp, Mary June
Sent: Mon 3/13/2006 1:39 PM
To: Discussion list for SCIENCE IN FOCUS: FORCE AND MOTION

Dear Kristen

I am ccing Don Deresz who is the mentor for this group--maybe he can
respond to this question

Mary

Mary Kemp

WLRN ITV SERVICES

Distance Learning and Community Outreach

7003 SW 4th Street

Miami FL 33144

786-275-0803

786-275-0832 Fax

mkemp@wlrn.org

-----Original Message-----
From: channel-talkforce-bounces@learner.org [mailto:channel-
talkforce-bounces@learner.org] On Behalf Of Levy, Kristen
Sent: Monday, March 13, 2006 1:35 PM
To: Discussion list for SCIENCE IN FOCUS: FORCE AND MOTION

Yours is the first email I've received; however, the programs
weren't supposed to be viewed until today, so I'm not sure if any
emails were sent previously.

One topic I'd like to discuss with other teachers is how to go about
having students remember the difference between mass and volume. Do
you have any activities or pneumonic devices for teaching mass and
volume? How do your students remember the units that mass and volume
are measured in?

I normally teach a unit on density, which we spend a lot of time
on, before delving into force and gravity. Still, many student
struggle with the measurements.

Thank you,

Kristen Levy
TJMS
Kristen.Levy@pwssd.k12.wi.us

-----Original Message-----
From: channel-talkforce-bounces@learner.org [mailto:channel-
talkforce-bounces@learner.org]On Behalf Of Kemp, Mary June
Sent: Monday, March 13, 2006 11:56 AM
To: channel-talkforce@learner.org

WELCOME TO THE ANNENBERG WORKSHOP

My email wasn't working correctly

Please let me know how you are doing via Channel-talkforce!

Mary Kemp

WLRN ITV SERVICES

Distance Learning and Community Outreach

7003 SW 4th Street

Miami FL 33144

786-275-0803

786-275-0832 Fax

mkemp@wlrn.org

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