Today we measured the mass of our eggs and saw osmosis really worked! IF YOU WERE ABSENT you will need to calculate the percent change of the eggs AND answer conclusion questions using complete thoughts in your notebook page 87 (88 if needed):
1. Did water move across the membrane as you expected?
2. How did this experiment demonstrate osmosis (aka diffusion of water)?
3. How does this activity explain why our fingers and toes get pruned and swollen when we soak in the bathtub too long?
4. How does this activity explain why drinking very salty ocean water is unhealthy and would damage our cells?
Tomorrow we SWYK on your understanding of transport across selectively permeable membranes (diffusion, osmosis, passive and active transport). We are ready to discuss energy in cells next week!!!
RETIRED Science Teacher
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