SmithLifeScience                                    Name __________________ Period _____
Reading Study Guide Chapter 2 Living Things
2-3 Discovering Cells  (pp.50-57)

An Overview of Cells (p.51)

1. What are cells?____________________________________________________
____________________________________________________________________

First Observation of Cells (p.51-53)

2. A ________________ is an instrument that makes small things look large.

3. The invention of the microscope made it possible _________________________

4. A ________________ microscope has one lens.

5. A ___________________ has more than one lens.

6. One of the first people to observe cells was ________________________.

7-9. Anton van Leeuwenhoek used a microscope he built to look at:
          A. ____________________
          B. ____________________
          C. ____________________

10.van Leeuwenhoek saw moving "little animals" he called _________________.

11-17 Fill in the chart about the timeline of the microscopes.

Development of Cell Theory (p.54-55)

18-20. Fill in the chart with the name of the scientist who said:

21-23. List the three points of the cell theory.
          A. ____________________
          B. ____________________
          C. ____________________

Light and Electron Microscope (p.55-57)

24. The lenses in light microscopes magnify an object by _______________________
________________________________________________________________

25. What is the total magnification of a microscope with a first lens that makes the image 20X larger and a second lens that makes the object look 30X larger? ___

26. A microscope that uses a beam of electrons instead of light to produce a magnified image is called a ________________ microscope.

2-3 Assessment

Identify the inventor of these microscopes

    27. _______________             28. ______________         29. ______________