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Lesson Plans:
Modeling
Limits To Cell Size:
By constructing small paper boxes and filling them with sand,
students can answer questions about cell growth.
Osmosis-Lab
Study
This experiment is to understand the process of osmosis.
Active Transport
The student will be able to comprehend that energy is required to move
substances across the cell membrane against the concentration gradient.
The Effects Of Osmotic
Balance And Imbalance In Living Cells
Students will prepare a wet mount of an elodea leaf in tap water and a wet
mount of an elodea leaf in salt water for microscopic observation.
Acids,
Bases, and Cells
This an excellent study of how cells will produce buffers to maintain an
environment of neutral pH so that their enzymes will not become denatured.
Adapted from BSCS Green, this lab is simple, easy to set up, requires no
special equipment, and the kids love it!
Diffusion
& Osmosis with Data Analysis:
This is a three part lab on diffusion and osmosis that can be
performed at any level of Biology. A description of a "new"
method to analyze the gathered data using a TI-82 Graphing Calculator is
included.
Flip
Books:
Students design and produce a small "movie" (flip book) of a
biological process. Enzyme action is described, but activity could be
adapted to almost any biological process.
Egg
Osmometers:
Students construct osmometers using raw eggs and
other readily obtainable materials. Osmometers
are used to examine the phenomena of concentration gradients, diffusion,
osmosis, osmotic pressure, passive transport, and active transport. Follow
links to activity page and teacher notes.
Diffusion
After the completion of this lesson, the student will be able to:
1. Understand the movement of liquid molecules in a solid
2. Explain how molecular weight affects diffusion rates.
Investigating
Solutions
Students are guided through the design of their own lab protocols as they
answer the question, "How can a cell keep from bursting or
shriveling?"
Drops of Water on a Penny
Students experiment to determine the number of drops of water can fit on a
penny.
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