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:

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

Day 2:

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

* 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

* 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

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 can become one of  these.

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