Hypothesis:
If the liquid outside a membrane is thicker than the liquid inside the membrane, than the liquid inside the membrane will move out to balance the concentration.
Materials:
2 eggs, 2 jars filled with vinegar, 2 measuring tapes, 1 jar filled with corn syrup, 1 jar filled with water, 1 tray filled with water (for wash), 1 balance, 2 long spoons
Procedures for Day 1:
1.) Create a chart to record your information.
2.) Carefully use the measuring tape and wrap around the large part of the egg.
3.) Record in centimeters. Record your information on the chart. Repeat for second egg.
4.) Using a balance, set measurement to zero (make sure weights are set to the far right). Carefully place egg on tray (Measure the mass of your jar’s lid, making sure arrow is in the center set at zero. Remember mass of lid. Place egg on top of lid. Find the TOTAL MASS of both egg and lid. SUBTRACT the lid’s mass from TOTAL MASS – this will give you the mass of the egg.) Slide gram weights until arrow on balance is in the center. This will tell you the MASS of your egg. Record your measurement on chart. Repeat for second egg.
5.) Carefully put one egg in each jar of vinegar.
Procedures for Day 3:
1.) Carefully lift both eggs out of vinegar jars (use spoons if needed – DO NOT BREAK EGGS!!). Gently put eggs in tray of water and gently roll in water to wash.
2.) Carefully wrap tape measure around the largest part of egg. Measure the diameter for BOTH eggs. Record you information on your chart for Day 3.
3.) Gingerly use your balance. (Measure the mass of your jar’s lid; making sure arrow is in the center set at zero. Remember mass of lid. Place egg on top of lid. Find the TOTAL MASS of both egg and lid. SUBTRACT the lid’s mass from TOTAL MASS – this will give you the mass of the egg.) Find the mass for BOTH eggs. Record information on your chart.
4.) Write down your observations for BOTH egg 1 and egg 2.
5.) Place egg 1 in jar filled with water. Put lid on tight.
6.) Place egg 2 in tall jar filled with corn syrup. Screw lid on tight.
Procedures for Day 4:
1.) Carefully lift egg 1 out of water jar.
2.) Carefully wrap tape measure around the largest part of egg.
Record you information on your chart (in centimeters) for Egg 1, Day 4.
3.) Gingerly use your balance. Record information on your chart for Egg 1 (in grams). (Measure the mass of your jar’s lid; making sure arrow is in the center set at zero. Remember mass of lid. Place egg on top of lid. Find the TOTAL MASS of both egg and lid. SUBTRACT the lid’s mass from TOTAL MASS – this will give you the mass of the egg.)
4.) Record your observations for Egg 1, Day 4.
5.) Carefully lift egg 2 out of corn syrup (use spoons if needed – DO NOT BREAK EGG!!). Gently put egg 2 in tray of water and gently roll in water to wash.
6.) Carefully wrap tape measure around the largest part of egg. Record you information on your chart (in centimeters) for Egg 2, Day 4.
7.) Gingerly use your balance. Record information on your chart for Egg 2 (in grams).
8.) Record your observations for Egg 2, Day 4.
Variables: Identify and list the variables in this experiment.
1.) Controlled Variables: No changes made to corn syrup, water, vinegar; all eggs were the same size, shape, type
2.) Independent Variables: Changed the liquids in which the eggs sat in to test hypothesis.
3.) Dependent Variables: The mass of each egg will change, depending on the liquid the egg sat in.
Conclusion: You will need to write this in paragraph form. Make sure to include EVERYTHING listed below:
a.) Restate the hypothesis. (Rewrite the SAME hypothesis you used in the experiment and at the beginning of your lab report.)
b.) Tell if your findings supported or did not support the hypothesis and why.
c.) Did anything go wrong in the experiment? What could you have done differently?
d.) Analyze your information and report your findings.
e.) EXPLAIN what you learned in the experiment and how it is related to what we are studying in class. (You will need to apply what you have learned through the reading and listening in class discussions to help answer this part.)