The Excellent Egg-speriment
Directions: Use the following information to answer questions 1 through 10.
LaFonda and Jose made a cell model out of a shell-less chicken egg in their science class. They put the egg
into different solutions in order to discover which way molecules were moving across the membrane.
LaFonda and Jose did the following controlled experiment.
Question: How does the type of liquid in the external environment (distilled water vs. corn syrup) affect
the mass of a shell-less egg?
Prediction (Hypothesis): If we place an egg in distilled water, the mass will increase because the water
will move into the egg. If we place an egg in corn syrup, the mass will decrease because the water inside
the egg will move out of the egg.
Materials:
3 beakers
3 shell-less eggs
graduated cylinder
vinegar
corn syrup
distilled water
balance
Controlled Experiment Set-up
Beaker 1
Vinegar
Beaker 2
Distilled Water
Beaker 3
Corn Syrup
Procedure:
1. Label one beaker “Vinegar”, one beaker “Distilled Water” and one beaker “Corn Syrup”.
2. Measure 200 mL of vinegar and pour it into the “Vinegar” beaker.
3. Measure 200 mL of distilled water and pour it into the “Distilled Water” beaker.
4. Measure 200 mL of corn syrup solution and pour it into the “Corn Syrup” beaker.
5. Mass one shell-less egg and record the mass. Place this egg into the beaker labeled “Vinegar”.
6. Mass one shell-less egg and record the mass. Place this egg into the beaker labeled “Distilled
Water”.
7. Mass a different shell-less egg and record the mass. Place this egg into the beaker labeled “Corn
Syrup”.
8. Allow the eggs to sit for 24 hours.
9. Remove the egg from the “Vinegar” beaker, and mass it. Record the mass in the data table.
10. Remove the egg from the “Distilled Water” beaker, and mass it. Record the mass in the data table.
11. Remove the egg from the “Corn Syrup” beaker, and mass it. Record the mass in the data table.
Data:
LaFonda and Jose Solution vs. Mass
Trial 1
Trial 2
Type of
Initial Final
Initial Final
Solution Mass
Mass
Mass Mass
Vinegar
97.9 g 102.9g 78.6 g 80.3g
Corn
110.7g 101.7
97.4 g 82.1
Syrup
g
g
Distilled
98.6 g 106.2
111.4 123.8
Water
g
g
g
Ms. Love’s
eggs
1
2
3
4
5
6
7
AVG
Mass
Change
Cristostomo’s
Eggs
1
2
3
4
5
Average
Mass Change
Water Mass g
Day 1
Day 2
74.9
79.4
73.5
77.7
78.4
81.2
76.9
79.0
75.8
78.2
83.72
83.72
77.8
70.5
77.28
78.53
+1.25
Trial 3
Initial Final
Mass Mass
84.2g 85.7g
107.6 99.8
g
g
76.9 g 88.4
g
Corn Syrup Mass g
Day 1
Day 2
79.4
79.4
73.0
66.1
75.3
67.2
79.2
70.5
77.4
70.8
73.08
64.4
77.7
70.7
76.44
69.87
-23.34
Distilled Water
Initial Mass Final Mass
95.82g
98.37g
97.99g
98.55g
92.45g
96.76g
94.12g
95.87g
90.83g
92.11g
94.24g
96.33g
+2.09g
Average
Initial Final
Mass Mass
86.9 g
105.2
g
95.6 g
89.6g
94.5
g
106.1
g
Average
Mass Change
+2.7g
-10.7g
+10.5g
Vinegar Control Mass g
Day 1
Day 2
79.9
46.1
75.8
59.3
75.6
56.0
78.9
63.7
76.7
66.1
77.84
45.92
79.4
43.4
77.7
54.36
-6.57
Corn Syrup
Initial Mass Final Mass
88.69g
59.15g
98.85
64.16
94.37g
60.67g
98.41g
60.87g
95.39 g
58.08g
95.12g
60.59g
-34.53g
Vinegar
Initial Mass Final Mass
93.09g
99.36g
94.86g
98.97g
93.98
99.17
+5.19g
1. Which cell part produces proteins?
o
A. ribosome
o
B. nucleus
o
C. mitochondria
o
D. vacuole
2. What is the main function of the cell wall?
o
A. To store carbohydrates for later use
o
B. To give the cell a rigid structure
o
C. To package proteins for export
o
D. To carry out photosynthesis
3. Which part of the cell produces ATP for the egg to grow?
o
A. nucleus
o
B. ribosome
o
C. cytoplasm
o
D. mitochondria
4. How can Jose and Lafonda increase the reliability of their experiment?
o
A. Repeat the same procedure using a different cell model.
o
B. Repeat the same procedure to conduct more trials.
o
C. Add another controlled variable.
o
D. Add another dependent variable.
5. What is the manipulated variable of their experiment?
o
A. The Change in mass of the eggs.
o
B. 200mL of liquid in each beaker.
o
C. The shells removed from all eggs.
o
D. The different liquids the eggs were in.
6. What is the responding variable of their experiment?
o
A. The Change in mass of the eggs.
o
B. 200mL of liquid in each beaker.
o
C. The shells removed from all eggs.
o
D. The different liquids the eggs were in.
7. Write a conclusion for this controlled experiment.
In your conclusion, be sure to:
 Answer the experimental question.
 Include supporting data from the Type of Solution vs. Mass table.
 Explain how these data support your conclusion.
 Provide a scientific explanation for the trend in the data.
Question: What is the effect of type of solution on mass of the egg?
Conclusion:
8. Which of the following processes occurs when water moves through the cell membrane?
o
A. Osmosis
o
B. Replication
o
C. Active transport
o
D. Protein Synthesis
9. Which cell part is responsible for photosynthesis?
Write your answer in the box.
10. Animal cells absorb nutrients from the environment around them. What cellular process moves
nutrients across cell membranes from an area of low concentration to an area of high concentration?
o A. Facilitated diffusion
o
B. Passive Transport
o
C. Active Transport
o
D. Osmosis
11. Which cell part contains genetic information for the egg cell?
o
A. Chloroplast
o
B. Cytoplasm
o
C. Vacuole
o
D. Nucleus
12. Which cell organelle is selectively permeable to materials entering and exiting the cytoplasm?
o
A. Chloroplast
o
B. Plasma Membrane
o
C. Vacuole
o
D. Nucleus
13. Which organelle is not present in an animal cell?
o
A. Mitochondria
o
B. Cell Membrane
o
C. Chloroplast
o
D. Microtubules
14. Plan a controlled experiment to answer the question in the box. You may use any materials and
equipment in your procedure.
Be sure your procedure includes:





Logical steps to do the experiment
Two controlled (kept the same) variables
One manipulated (independent) variable
One responding (dependent) variable
How often measurements should be taken
and recorded
Question: What is the effect of Kool-Aid on the mass of the egg?
Procedure:
MV:
CV:
RV: