# Temperature is commonly measured in Canada using the Celsius scale. The unit of measurement is degree Celsius ( C).

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1 Temperature People talk about weather and weather conditions daily. Temperature, precipitation, UV index and amount of sunshine are important to the way we dress, what we do and even how we feel! Temperature is commonly measured in Canada using the Celsius scale. The unit of measurement is degree Celsius ( C). Normal room temperature is around 20 C. The boiling point of water is 100 C. Healthy body temperature is 37 C. +30 C +20 C +10 C Thermometers are used to measure the temperatures of air, liquids and human bodies. 0 C 10 C 20 C Each degree has a value of 1 and is divided into tenths, just like metric lengths. 1 C 0 C Alberta Education, Alberta, Canada ( Temperature 1/10

2 Practice: Temperatures on a Thermometer 1. Use experimentation, reference materials or other sources of information to fill in the temperatures in the chart below. Use the last two rows to take interesting temperatures of your own. Condition Temperature ( C) Freezing temperature of water Boiling point of water Normal body temperature Normal room temperature Armpit temperature Hands before rubbing them together Hands after rubbing them together for 10 seconds 2. Label and identify the temperatures from the table above on printed copy of the thermometer on the next page. Alberta Education, Alberta, Canada ( Temperature 2/10

3 130 C 120 C 110 C 100 C 90 C 80 C 70 C 60 C 50 C 40 C 30 C 20 C 10 C 0 C 10 C 20 C 30 C 40 C 50 C 60 C 70 C 80 C 90 C 100 C 110 C 120 C Alberta Education, Alberta, Canada ( Temperature 3/10

4 3. For each of the following, work with classmates to estimate, then measure each temperature using a thermometer. Situation/Condition Glass of warm water Outside temperature Glass of ice water Room temperature Estimated Temperature ( C) Actual Temperature ( C) 4. Estimate the following temperatures on your own, then compare estimations with one or two of your classmates and be prepared to support or alter your estimations. Situation/Condition Cool day Estimated Temperature ( C) Warm bath Refrigerator Ice cream Freezer Very cold day Hot tub Cold drink Alberta Education, Alberta, Canada ( Temperature 4/10

5 Converting Celsius and Fahrenheit Temperatures Temperature is commonly measured in Canada using the Celsius scale. The unit of measurement is degree Celsius ( C). Another scale used to measure temperature is the Fahrenheit scale. The United States and some countries in Europe measure temperatures in degrees Fahrenheit ( F). Fahrenheit Celsius Alberta Education, Alberta, Canada ( Temperature 5/10

6 Converting from Celsius to Fahrenheit To convert from Celsius to Fahrenheit, use the following formula: To estimate a temperature in F when given a temperature in C: F = 9 C Take the temperature in C, multiply by 2 and add 20. Example If the temperature is 20 C, what is the temperature in F? Exactly Approximately F = 9 20 C F = 20 C x = = = 68 F = 60 F Converting from Fahrenheit to Celsius To convert from Fahrenheit to Celsius, use the following formula: To estimate a temperature in C when given a temperature in F: C = 5 ( F 32) 9 Take the temperature in F, divide by 2 and subtract 15. Example 85 F would be how many C? Exactly Approximately C = 9 (85 F 32) C = 85 F 2 15 = 9 5 (53) = = 29.4 C = 27.5 C Alberta Education, Alberta, Canada ( Temperature 6/10

7 Practice: Converting Temperatures 1. Use a variety of strategies to estimate the following temperatures. a) 30 C = F b) 80 F = C c) 25 C = F d) 65 F = C e) 0 C = F f) 70 F = C g) 12 C = F h) 92 F = C 2. Amandeep is investigating tropical locations to plan a winter vacation. He is experiencing some difficulties because his sources identify average temperatures using the Fahrenheit scale. Help Amandeep convert each temperature to Celsius. Cuba 68 F Jamaica 78 F Hawaii 74 F Greece 70 F Australia 66 F England 56 F 3. Brendon left London, where the temperature was 21 C, and arrived in Florida, where the temperature was 70 F. Which location had the warmer temperature? Think About How do you and your family use temperature at home? Do you use degrees Fahrenheit or Celsius? How is temperature use in the workplace? Think of examples of how temperature is important to chefs, welders, pet store clerks, factory workers and millwrights. Alberta Education, Alberta, Canada ( Temperature 7/10

8 Temperature Changes A thermometer or a number line can be used to help determine changes in temperature. Example A) In the morning, the temperature outside was 5 C. By late afternoon, the temperature was 20 C. How many degrees did the temperature increase during the day? Final temperature C to 20 C = 15 The temperature change is +15 C 5 Start temperature Temperature change is a positive number if the temperature increases Hint: Temperature changes are just like adding and subtracting integers. Think back to the hot air balloon examples in Adding Integers and Subtracting Integers. Alberta Education, Alberta, Canada ( Temperature 8/10

9 B) On another day, the afternoon temperature was 20 C. By evening, the temperature decreased to 2 C. What is the change in temperature? Start temperature C to 2 C = 18 The temperature change is 18 C Final temperature Temperature change is a negative number if the temperature decreases Alberta Education, Alberta, Canada ( Temperature 9/10

10 Practice: Calculating Temperature Changes 1. A storm was blowing across southern Alberta. At 2:00 p.m., the temperature was 26 C. An hour later, it had dropped by 7 C. At 4:30 p.m., the temperature rose by 5 C. Two hours later, the temperature dropped another 2 C. What was the temperature at 6:30 p.m.? 2. Daniel and Missy wanted to examine world temperature changes. They found the daily low and high temperatures for one day at various locations around the world. Use the data they collected below to calculate the temperature change at each location. Use a thermometer or number line to indicate the following temperature changes. Remember: Location Temperatures Temperature Change 1 5 C to 25 C 2 5 C to 18 C 3 10 C to 30 C 4 8 C to 1 C 5 0 C to 28 C + indicates an increase in temperature indicates a decrease in temperature. 3. Examine the temperature changes above to answer the following questions. a) Which location had the: greatest temperature change? smallest temperature change? b) Using sentences, explain where you would like to live (locations 1 through 5) and give reasons for your choice. Alberta Education, Alberta, Canada ( Temperature 10/10

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