Egg as a Cell
STANDARD 3200-03 Students will understand structure and function of cells and organisms.
OBJECTIVE 3200-0302 Investigate cellular structures and functions.
Intended Learning Outcomes:
Students will use eggs as cell models and demonstrate osmosis.
Students will measure and observe the changes in the mass and size of the egg.
In order to make his shows more entertaining to the public, Mr. Barnum of Barnum and Bailey Circus, decided to collect whales from the ocean and display them for his audience. He collected the whales and kept them in large uncovered tanks until showtime. Unfortunately, it rained the opening day of his show. The salt water in the tanks, which held the whales, was diluted by the rain that fell that day. This change in the amount of salt in the water compared to the amount of water, caused the death of the whales. Unwilling to admit to his audience that the whales were dead, he told them that that day's rain would cause the cancellation of the show. Not to fear, he would give everyone a check that would allow them to see the next whale show. He would give them a rain check. Mr. Barnum is credited with coining the phrase "rain check". What does the death of Mr. Barnum's whales have to do with the following activity on osmosis?
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Updated June 15, 2000 by: Glen Westbroek
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