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Problem/question What substances will pass through the membrane of an egg? Will substances which pass through the membrane of the egg demonstrate a net movement into or out of the egg?

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Problem/question What substances will pass through the membrane of an egg? Will substances which pass through the membrane of the egg demonstrate a net movement into or out of the egg?

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Hypothesis (prepare in the IF/THEN or CAUSE/EFFECT format

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Hypothesis (prepare in the IF/THEN or CAUSE/EFFECT format

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If the water, and food coloring can pass through the membrane of an egg than there will be water, and food coloring on the inside of the egg. If Karo Syrup cannot pass through the membrane of an egg than the will not be karo syrup on the inside of the egg

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1.  Obtain a raw egg. Using a string, measure the transverse circumference and

longitudinal circumference of the egg.  Record you results in Table One.

2.  Using an electronic balance measure the mass of your egg.  Record your results in Table One.

3.  Put the raw egg (shell and all) into your plastic cup.

4.  Using a graduate cylinder, measure enough Acetic acid to cover the egg in the container.  Record the amount

used in Table Two.

5.  Cover the container with aluminum foil.  Label a piece of masking tape with your names and class hour.

Place the cup in the area designated by your instructor.

6.  Let the egg rest for 48-72 hours.

7.  Remove the egg from the container.  Measure the amount of acetic acid left in the container with a graduate

cylinder.  Record the data in you results section.  After measuring the volume, rinse the used acetic acid

down the sink drain using copious amounts of water.  Rinse and dry the plastic cup.

8.  Using a string, carefully measure the longitudinal circumference and the transverse circumference of the

egg.  Record the results in Table One.

9.  Using the electronic balance, record the mass of your egg.  Record the results in Table One.

10.  Return the egg to the container.  Using a graduate cylinder, measure enough Karo Syrup or Water

(whichever you were assigned) to cover the egg.  Record the volume in Table Two.

11.  Cover the container with tin foil.  Make sure it is labeled with your name and hour.  Leave the container

undisturbed for 24 – 48 hours.

12.  Remove the egg from the cup and measure its transverse and longitudinal circumference.  Record your

results in Table One.

13.  Using a graduate cylinder, measure the mass and fluid remaining the cup.  Record your results.

14.  Rinse any fluids down the drain, but be sure to place the egg membrane and yolk in a plastic lined garbage can.

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Results Posts Graphs/ Tables of Data Collected

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Results Posts Graphs/ Tables of Data Collected

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Results:

Table One: - Egg Measurements

Day of

Experiment

Date

Longitudinal

Circumference

(mm)

Transverse

Circumference

(mm)

Mass

(g)

Lab Day One

11-21-14

160

120

56

Lab  Day Two

11-24-14

190

160

82.2

Lab Day Three

11-25-14

190

160

81.8

Table Two – Liquid Volumes

Name of Liquid

Volume Used

(ml)

Volume Remaining

(ml)

Acetic acid

101

75

Karo Syrup OR

Water  (Circle One)

150

117

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1) The Shell of the egg dissolved when it was placed in the acetic acid.

2) A. When the egg was placed in the acetic acid the water molecules moved into the egg, because the egg was hypotonic, and did not have as high of a concentration of water molecules as the acetic acid did.

B. The evidence I have for the conclusion that the water molecules moved into the egg is that the egg had a larger longitudinal, and transverse circumference, and the egg had a larger mass than before it was placed in the acetic acid. Also there was less acetic acid in the cup than when we put the egg in it in the first place. The egg was hypotonic, and had a lower concentration of water than the acetic acid.

3) A. The molecules moved into the egg when the egg was placed in the in the water.

B. The evidence for that the water molecules moved into the egg is that when the egg was placed in the water it turned blue. The egg would have not turned blue if the water molecules did not move into the egg. When the egg was placed into the water it was hypotonic because it had less food coloring , and water in the egg than that in the cup.

6) If a jellyfish were placed in Lake Arbutus the jellyfish would die, because it would not be in the environment that it is adapted to. Osmosis would make almost all the salt leave the jellyfish, and without salt the jellyfish would die. The Jellyfish would be hypertonic, and Lake Arbutus would be hypotonic, because the Jellyfish would have a higher concentration of salt.

7) If a perch were placed in the Atlantic Ocean than the perch would die. The perch would die because it couldn't live with salt water in it's cells. There would be salt in the perches cells because osmosis would make the cells of the perch have about the same amount of salt as in the Ocean. The perch would be hypotonic, and the Atlantic Ocean Would be hypertonic, because the Atlantic Ocean would have a higher concentration of salt than the perch.