Waiting to Exhale By: Elizabeth Feigel February 2010
Science Standard 1-The Nature of Science and Technology
Indicator 3.1.4- Discuss the results of investigations and consider the explanations of others.
Taken from: http://dc.doe.in. gov/Standards/AcademicStandards/StandardSearch . aspx
Link to activity: http://www. indianastandardsresources .org/files/sci/sci_3_1_waiting%20to%20exhale. pdf
Inflated- filled or expanded by or as if by gas or air
Exhale- to breathe out
Pliable- easily bent or shaped; receptive to change, adaptable
Compare- to consider or describe as similar, equal, or analogous, liken; to examine in order to note the similarities or differences of
Observation- an inference or judgment that is based that is acquired from or based on observing
Observing is the fundamental science process skill. We observe objects and events using all our five senses, and this is how we learn about the world around us ( http://www.longwood.edu/cleanva/images/sec6.processskills.pdf )
(All definitions taken from www.thefreedictionary.com )
Your lungs are in your chest, and they are so large that they take up most of the space in there. You have two lungs, but they aren't the same size the way your eyes or nostrils are. Instead, the lung on the left side of your body is a bit smaller than the lung on the right. This extra space on the left leaves room for your heart.
As you breathe in, your diaphragm contracts and flattens out. This allows it to move down, so your lungs have more room to grow larger as they fill up with air. "Move over, diaphragm, I'm filling up!" is what your lungs would say. And the diaphragm isn't the only part that gives your lungs the room they need. Your rib muscles also lift the ribs up and outward to give the lungs more space.
When it's time to exhale (breathe out), everything happens in reverse: Now it's the diaphragm's turn to say, "Move it!" Your diaphragm relaxes and moves up, pushing air out of the lungs. Your rib muscles become relaxed, and your ribs move in again, creating a smaller space in your chest.
Stretch your balloon until it is pliable and ready to be blown up
Take a deep breath and blow up the balloon as much as you can with ONE breath
Hold the opening of the balloon tightly closed so no air can escape and look at the size of your balloon
Compare the size of your balloon with the size of your classmates’ balloons
Why do you think the balloons are different sizes?
Part 1- Comparing
Part 2- Fully inflating the balloon
Completely blow up your balloon one breath at a time
You should take one deep breath, fully inflating your lungs, then blow all that air into the balloon, and then hold the balloon shut. This counts as one breath.
When will we know when the balloon is completely inflated?
Create a class definition of a “fully blown up balloon”
Should we measure it with a string? Inflate it until it pops?
Part 2 Cont’d.
4. Count the number of breaths it takes to fully inflate the balloon
Record class data in the chart on the following slide
Based on your chart, how many breaths would it take to inflate 100, 500, or 1,000 balloons?
How Many Breaths Does It Take To Blow Up A Balloon? Number of Breaths Name Number of Breaths Name
Questions to Consider About Our Results
Did anyone have trouble blowing up their balloon?
Was there a difference in the number of breaths needed between boys and girls?
Was there a difference in the number of breaths needed between taller and shorter people?
Did anyone have a cold, allergy, or illness?
Are all the balloons the same?
Did any air escape outside the balloon?
Is anyone a swimmer?
Is air pollution a problem for anyone?
Does anyone play a wind instrument?
What did the results of our experiment show?
A. The amount of stretch a balloon has
B. The class average of how many breaths are needed to inflate a balloon
C. That boys have smaller lungs than girls
D. That pink balloons inflate larger than blue ones