Eggs-perimenting with Eggs
by Edward Gawne

Introduction

Is there any difference  between white egg shells and brown? What is a semi permeable membrane any way? I looked at the  chemical changes or reactions of the ways cells move materials across the membrane.

Materials

white raw egg
brown raw egg
2 beakers
measuring cup
vinegar
corn syrup messy but fun and tasty
water
scales
mom's camera

Procedure

1.  Weigh and measure circumference of raw egg. Place in 200 mL vinegar, cover leave over night.

2. Measure the amount of vinegar , weigh and measure the egg. Write down answer in data chart. Place the egg in 200 mL of light corn syrup, cover and leave over night.

3. Measure the amount of syrup, weigh and measure the egg. Record results. Place the egg in 200 ml of water, cover & leave over night.

4.  Measure the amount of water.  Weigh and measure the egg. Now you get to smash the egg.      

Data Collected


Brown Egg
Day
Weight of egg before
weight of egg after one day in
mL of  Liquid  added
mL of liquid after one day in
weight of both egg and liquid
1
35g vinegar
85g vinegar
200 mL vinegar
160 mL vinegar
263g
2
85g syrup
52.5g syrup
200 mL syrup
175 mL syrup
450g
3
52.5g water
93g water
200 mL water
150 mL water
300g


White Egg
Day
Weight of egg before
weight of egg after one day in
mL of Liquid added
mL of liquid after one day in
weight of both egg and liquid
1
36.5g vinegar
81g  vinegar
200 mL vinegar
160 mL vinegar
263.5g
2
81g syrup
47.5g syrup
200 mL syrup
175 mL syrup
450g
3
47.5 water
91g water
200 mL water
150 mL water
300g


Observations

Day 1, day of:
in vinegar
Brown Egg
White egg
clear smooth eggs, tan
clear smooth egg, white
clear liquid
clear liquid
slower but still bubbles
lots of bubble action
bigger bubbles
tiny bubbles
after the vinegar

Day 2:
into syrup

Brown Egg
White Egg
shell is coming off
looks larger
smoother than white egg

had brown  foam on top
translucent, light white
slimy, soft, & sticky
feels slimy, soft, and sticky
not as translucent
shell is off
* Both eggs floated very high when I put them in the syrup

Day 3
into the water next

* Both eggs had sunk right into  the syrup
Brown Egg
White Egg
smooth but shriveled up
very wrinkled and shriveled up
shell completely gone
slimy, soft, slippery, sticky
slimy, soft, slippery, sticky
see yolk clearly
* Both eggs sunk to the bottom of the water cup

Day 4
last day

* Both floated to the top, other than a very slight color difference, both eggs look, feel and smell the same.
Brown egg and White Egg
puffed really big expanded to the biggest it's been yet
soft, slimy, bouncy
I can see the yolk move a bit, it goes down when I turn it
 
Circumference measurements:





Vocabulary I learned:
Edward’s Glossary :

Diffusion -the process whereby particles in dissolved substances move from a region of higher to one of lower concentration

Semi permeable    - having partial pores or openings that permit liquids or gases to pass through

Membranes    - a thin soft pliable sheet or layer

Calcium    - a soft greyish-white  metallic element occurring in limestone, bones and teeth

Chemical reaction    - a process where by compounds or elements undergo a change inn structure and form new compounds

Acid    - any class of substances that liberate hydrogen ions in water and have a pH of less than 7

Porous    - capable of being penetrated or permeable to fluids

Osmosis    - movement of a solvent through a semi permeable membrane (as of a living cell) into a more concentrated solution, so as to make the concentration on the two sides more nearly equal.

Beaker    - a deep wide mouthed vessel usually with a lip for pouring that is used especially in science laboratories

concentration    - the weight of volume of material 

circumference     - The enclosing boundary of a circle




Parts of an Egg
parts of an egg

Conclusion:

I didn't see any difference in the brown egg vs the white shell maybe a little bit thicker.  Membranes are pretty cool. A membrane is any  thin sheet like structure. It's like an outer wall. A semi permeable membrane can control how much liquid or air goes in or out. The calcium reacted very quickly and devolved the acid vinegar. Shells are porous so air can get in and out to help the chick grow. Its a good thing there's a membrane because it helped every thing stay together so I could do this experiment. I guess this shows a lot like the cells in our body that carry oxygen to are heart, carbon dioxide to our lungs , blood to our toes or nutrients from are stomachs.
The best part though was measuring to how high I could bounce the egg before it broke.  The Brown egg had the dark orange yolk and broke at 40 cm off the ground. The white egg with the yellow yolk broke at 30 cm off the ground. It's cool to understand that one of the these
egg
can become one of  these.
chicks


Acknowledgments

Mom - thanks for letting us mess up the kitchen.
Mrs. Lynne - for getting us the white eggs
Mathew - my little brother who asks too many questions because then I got to go look up the answers on the computer
Adolina - My big sister - for taking pictures, helping write notes because my hands were messy and spell checking for me.

Bibliography
All Web pages

Structure of an Egg, Picture called Parts of an Egg, http://www.urbanext.uiuc.edu/eggs/res16-egg.html, last visited April 16/04

DiffusionandSemiPermeableMembranes, http://www.eduref.org/cgi-bin/printlessons.cgi/virtual/lessons/science/chemistry/CHM0004.html, last visited April 19/04

BouncingEggsinScience, http://www.eduref.org/cgi-bin/printlessons.cgi/Virtual/Lessons/Science/Chemistry/CHM0004.html
Last checked April 21/04

Project Information.
Grade Grouping      - 4
 Team Size      -1
 Subject Area      Chemistry
 Project Type    Experimental
 Project Level     -Standard
 Project Format    -Traditional
 A Summary of your project    -What is a membrane?
 A description of the Software Tools used.     -Netscape Composer and Apple works 6
 A mention of the Hardware Tools used     -Moms camera (not digital), Dad's science scales
 A mention of the Source of the Idea for the project    -Easter web sites
 A description of the Special Skills you used to build your project   -Apple works and Netscape composer