Measuring Temperature
 

Topic One: Hot and Cold (p. 196)

Topic Two: Measuring Temperature (p. 205)

Topic Three: Special Purpose Devices (p. 212)
 
 
 

Students should be familiar with the following concepts:
 
 
 

Concept #1 Temperature is the measure of how hot or cold a substance is.
 

Students should be able to define temperature as the measure of how hot or cold a substance is.
 
 
 

Concept # 2 A thermometer is required for accurate temperature measurement.
 

Students should be able to state that the Celsius scale is the most frequently used scale for measuring temperature.
 

Students should be able to identify instances where accurate temperature measurement is important.
 
 
 

Concept # 3 Thermometers have been calibrated with respect to agreed upon fixed points.
 

Students should be able to identify the fixed points commonly used in calibrating a Celsius thermometer as the boiling point and freezing point of water.
 
 
 

Concept # 4 A thermometer's structure, design and materials are related to its function.
 

Students should be able to describe different types of thermometers: liquid, gas, bimetallic strip, and thermocouple.
 

Students should be able to describe how the structure, design, and materials of a thermometer are related to its function.
 
 
 

Concept # 5 Thermometers work because of the uniform expansion and contraction of specific substances.
 

Using their knowledge of expansion and contraction, students should be able to explain how liquids, gas, and bimetallic strip thermometers work.
 

* * * * *
 
 
 
 
 

Students should be familiar with the activities completed in class and in the science laboratory.
 

Review Checkpoint, page 211, questions # 1 - 9

Review Checkpoint, page 234, questions # 1, 3, 5, 6, & 8
 

UNIT REVIEW, pages 248-249: Study the first four points in Focus. 

Backtrack: # 1 - 6, & 8. Synthesizer: # 9 - 12, 15, 16, & 19.
 
 
 

TERMS: 

Students should be able to pick out the meaning of the following words from a list: gas, liquid, solid, states of matter, volume, expansion, contraction, thermometer, centigrade, calibrate, bimetallic strip, clinical thermometer, laboratory thermometer, thermostat, thermocouple, resistance thermometer, optical pyrometer, thermograph, and infrared light.

DIAGRAMS:

Students should be familiar with all the diagrams in their book from pages 196 - 217. Be able to explain what is happening in each diagram.

SOME SPECIFIC QUESTIONS:
 

1. Draw a labelled diagram of a laboratory thermometer.
 

2. List four essential parts of a laboratory thermometer and explain the function of each part.
 

3. Describe the ways in which a clinical thermometer and a laboratory thermometer are different.
 

4. Describe the difference between a bimetallic strip and a thermocouple.
 

5. Using what you know about expansion and contraction, explain how Canadian pioneers made the metal rims fit tightly on the wooden wheels of their wagons.
 

6. Assume that an engineer is assigned the task of fitting a steel cylinder snugly inside an aluminum cylinder block. Explain a way to solve this problem.
 

7. Explain why a liquid clinical thermometer has a very fine bore.
 

8. Describe the difference between expansion and contraction.
 

9. Explain why an ordinary glass bowl taken from the refrigerator and put into a hot oven is likely to crack, but Pyrex probably won't.