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Lesson Plans
Significant What?
Learning Activity
Focus for Media Interaction - Question Sheet

Name: __________________________________

1. Watch the following segment and write down as many different kinds of measurement shown as possible. Be sure to record the units used.

Measurement Units Used
   
   
   
   
   
   
   
   
   
   


2. Listen for the definitions of the term "measurement." What do they all have in common?

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3. Find out what the International Standards actually are, and where they are found in the United States.

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4. What is a significant figure, and how does it relate to the true measurement?

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5. What must we do when we measure?

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6. What are the results of mercury poisoning?

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7. How does metallic mercury get into the food chain?

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8. What is the USDA safe level for mercury, and why is it necessary to keep the level so low?

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9. Why do scientists do at least three measurements and take an average?

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10. What is a true value?

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11. What does "precise" mean? What is "accuracy"? Compare and contrast the concepts of precision and accuracy.

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