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Lesson 2 - Comparative Sizes of Objects

Student Performance Objectives
1. Explain the numerical difference in size of a crystal of salt, a typical human cell, a bacterial
    cell, a DNA molecule, a water molecule, and a carbon atom.
2. Solve simple problems interconverting metric and English equivalents for length.
3. Explain the difference between eucaryotic and procaryotic cells.
4. Explain the difference in size of eucaryotic and procaryotic cell.

Lesson Outline
A. Review handout on the relative sizes of cells and their components from reference
     source: Goodsell, D.S., The Machinery of Life.
B. Metric-English equivalents - work only with length measurements today: meter,
    centimeter and inch, and foot conversion values
C. Visit "How Big?" animation
D. Assignment: written report on "What is a Rhinovirus, Ebola virus, Staphylococcus
and E. coli bacteria."

Biomedical Terminology:

eucaryotic cell
procaryotic cell