Prentice hall Biology Worksheets
Name[pic] Class[pic] Date[pic]
Section 1-4 Tools and Procedures (pages 24-28)
[pic] Key Concepts
* What measurement system do most scientists use?
* How are light microscopes and electron microscopes similar? How are they different?
A Common Measurement System (page 24)
1. Why do scientists need a common system of measurement?[pic]
[pic]
2. When collecting data and doing experiments, what system of measurement do most scientists use?[pic]
3. What is the metric system?[pic]
[pic]
4. Complete each equation by writing the correct number or metric unit.
a. 1000 meters = 1[pic]
b. 1 liter =[pic]milliliters
c. 1 gram =[pic]milligrams
d. 1000 kilograms = 1[pic]
Analyzing Biological Data (page 25)
5. When scientists collect data, what are they often trying to find out?[pic]
[pic]
6. What does a graph of data make easier to recognize and understand than a table of data?[pic]
Microscopes (pages 25-26)
7. What are microscopes?[pic]
[pic]
8. What are compound light microscopes?[pic]
[pic]
9. How do chemical stains make light microscopes more useful?[pic]
[pic]
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
22
Name[pic] Class[pic] Date[pic]
10. What are the two main types of electron microscopes?
[pic]
[pic]
12. How must samples be prepared for observation by an electron microscope?
11. Compare how a TEM and an SEM produce images.[pic]
[pic]
Laboratory Techniques (page 27)
13. A group of cells grown in a nutrient solution from a single original cell is called a(an)
[pic]
14. What technique do biologists use to separate one part of a cell from the rest of the cell?
[pic]
Working Safely in Biology (page 28)
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
23
15. What is the single most important rule for your safety while working in a laboratory?
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