EGG LAB WEEK!!!!

Wrap up of the whole Egg Lab!!!

While you were writing these down - I had a glass of water at your desk with some food coloring added to SHOW you the process of diffusion

A couple notes before we started our lab

Lab Set Up:
Today you got to know your egg, weighed your egg, NAMED your egg and placed it into 100ml of Vinegar.  In the meant time I had you create the following chart for this lab.

Egg Pics:

All snug as a bug in a rug.
(or as snug as an egg in beaker...)

Some of your "babies"

We moved our Eggs out of the vinegar...... Took the rest of the shell off and placed it into corn syrup.

What we were able to see today was the movement of the water in vinegar INTO the egg.  In the mean time the acetic acid was able to break apart the shell and leave us just with the cell membrane.

Only ONE Casualty!!!! 

Here is what happened at a Molecular Level:

Thursday:  No Daily Questions today - I had you jot down a couple slides that help show what did and didn't happen so far with our Eggs:

 Now to our EGGS!!!

We took them out of the corn syrup and observed that they were VERY "deflated" and flimsy.  We discussed this was because the water that had diffused INTO the egg yesterday diffused back OUT of the egg in order to maintain a constant water balance inside and outside of the cell.  The Corn Syrup (a very concentrated Sugar solution) could NOT pass through the membrane.  In OUR cells sugars move through specific transport proteins.  These are not present in the eggs membrane.



As you can see it is VERY flimsy and deflated because
water moved from inside the egg back out.

We know this because there is much more solution left in the beaker than we put in yesterday:

Yesterday we added 75mL of Corn Syrup.  Today there was approximately 100mL of solution

After making our observations we placed our eggs into 100ml of water and just for fun I let you add food coloring to see what happens!!!

Here is What happened at a molecular level today!

THEN..... Today was the best day of ALL!!!!!
Well... we started with daily questions (not THAT fun I guess)

THEN:  We took a look at the eggs from yesterday!!!!

You can see that OBVIOUSLY water
moved INTO the egg (by Osmosis) AS did
the food coloring.  This means that the
membrane was permeable to BOTH of these!

I encouraged you to have some fun with
it!!  The egg was SLIGHTLY bouncy!!

More bouncing action!

THEN came the final resting place
of the egg

Many of you chose to "pop" the egg into
the bucket!!

SOME of you didn't even MAKE it to the
death bucket :(

 NORMALLY - My motto is "Friends don't let friends take Selfies.... But I made an exception today....

I put a homework hand in on edline to let you upload any egg selfies you took or videos from the lab.  Here are a couple slow mo videos on the bouncing and the breaking of egg!!!

While those are fun..... Here is a little more detail on the MOLECULAR part of what happened between yesterday and today!!

Have an EGG-CELLENT Weekend!!! 

 (OK that was so lame it made ME gag a little!!!)