NAME_________________________________ DATE_________ HOUR____________
Place the egg in a cup and add just enough vinegar to cover it completely. Label your cup with your names, the date and your class period, then allow this to sit for at least two days.
After two days, pour the vinegar out of the cup. Be cautious not to break the egg! Find the mass of an egg and record your results in the data table below! Rinse off the egg and cup being careful not to break the raw egg. Record observations on the appearance of the egg including its shape, size and feel on the back of this sheet. Place the egg back in the cup and just enough corn syrup to cover the egg.
Be cautious not to break the egg! Pour the used syrup back into the container so designated, then rinse your cup out. Rinse the egg off and find the mass of the egg and record your results. Again record observations on the appearances of the egg on the back of this sheet. Place the egg back in the cup and add just enough water to cover the egg.
Dispose of the water down the sink. Find the mass of the egg and record your results. Again record observations on the appearances of the egg on the back of this sheet. Dispose of the egg in a container so designated.
|
EGG MASS DATA TABLE |
|
|
ORIGINAL MASS OF EGG |
XXXXXXXXXXXXXXX |
|
AFTER VINEGAR MASS |
- |
|
AFTER SYRUP MASS |
- |
|
AFTER WATER MASS |
- |
|
Day 3 egg observations - |
|
|
APPEARANCE |
- |
|
FEEL |
- |
|
SMELL |
- |
|
|
|
|
Day 4 egg observations - |
|
|
APPEARANCE |
- |
|
FEEL |
- |
|
SMELL |
- |
|
Day 5 egg observations - |
|
|
APPEARANCE |
- |
|
FEEL |
- |
|
SMELL |
- |
CONCLUSION
QUESTIONS
1. What was the purpose of putting the egg in vinegar?
2.
Why did the egg shrink or swell?
3. Which experimental set up was a hypertonic solution? _________________________
4.
Why does putting salt on a slippery winter sidewalk
kill the grass in the spring?
EACH STUDENT WILL WRITE A CONCLUSION PARAGRAPH
SEPARATE FROM THEIR PARTNERS! IT WILL BE
WORD PROCESSED AND STAPLED TO THIS SHEET.
Explain what happened to the egg in corn syrup and the egg in distilled water. The following parts of sentences must be included in your explanation. Connect these phrases with your own words. Use them word for word, just as they are and use the word processor to underline them in your paragraph.
…there was a large concentration gradient across the cell membrane…
…the water molecules diffused into the cell…
… in order to reach equilibrium…
…the egg was surrounded by a hypertonic solution…
…the egg was surrounded by a hypotonic solution…
…an investigation of osmosis…