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Copyright © Ed2Net Learning, Inc. 2 Hello! How are you? We are going to begin very interesting Lesson.

Copyright © Ed2Net Learning, Inc.3 Temperature Temperature is defined as the degree of hotness or Coldness of a body. Example: 32°C is hot 20°C is pleasant

Copyright © Ed2Net Learning, Inc.4 Units for measuring Temperature There are two units for measuring temperature. Degree Celsius (°C) Degree Fahrenheit (°F)

Copyright © Ed2Net Learning, Inc.5 Degree of temperature. Degree Fahrenheit is a Customary unit of temperature. Degree Celsius is a metric unit of temperature.

Copyright © Ed2Net Learning, Inc.6 Negative number A number that is less than zero degree. Examples: -5 °C, -1 °C, -2 °C When temperature is very cold, the thermometers show numbers below zero or negative numbers.

Copyright © Ed2Net Learning, Inc.7 Thermometer A thermometer is used to measure temperature. It shows how warm or cold something is. Temperature can be measured in: Degree Celsius (°C) Degree Fahrenheit (°F)

Copyright © Ed2Net Learning, Inc.8 Important Tips The red line in thermometer is really a liquid. The liquid filled in thermometer is Mercury. It moves up when air is warm. It moves down when air is cool.

Copyright © Ed2Net Learning, Inc.9 Thermometer showing °C and °F scale. To the left is °C and to the right is °F.

Copyright © Ed2Net Learning, Inc.10 Temperatures in °C and °F Activity°C°F Water Boils100212 Normal body temperature3798.6 A Hot day30101 Water freezes032 A cold day-1014 Room temperature2068

Copyright © Ed2Net Learning, Inc.11 Uses of Thermometer Use a thermometer to measure: The temperature of cold water from the sink. The temperature of hot water from the sink. The temperature of air.

Copyright © Ed2Net Learning, Inc.12 Difference in temperature When a lower body temperature is subtracted from the higher body temperature, difference in temperature is calculated.

Copyright © Ed2Net Learning, Inc.13 The lower temperature on Friday was 23°C and the higher temperature was 41 °C. Find the difference in lower and higher temperatures. Solution: Difference in temperature is 41 °C - 23 °C = 18 °C

Copyright © Ed2Net Learning, Inc.14 Fill the table with hot, pleasant, cold and freezing. TemperatureAir 30°CHot 19°CPleasant 0°CCold -9°CFreezing

Copyright © Ed2Net Learning, Inc.15 Write the temperature using °C. Then describe the temperature. Answer- 25 °C. The temperature is pleasant.

Copyright © Ed2Net Learning, Inc.16 The thermometers below shows the temperature when the school opens and ends. How many degrees did the temperature rise? Answer- 20°C

Copyright © Ed2Net Learning, Inc.17 Lee went water skiing today. Was the temperature outside 25°C or 25°F? Answer- 25°C

Copyright © Ed2Net Learning, Inc.20 1.Write the temperatures in order from hottest to coldest? 12°F, 29°F, -4°F, 0°F and 43 °F Answer - 43°F, 29°F, 12°F, 0°F, -4°F

Copyright © Ed2Net Learning, Inc.21 2. Write the temperature using °F. Also describe the temperature. Answer- 15°F Temperature is cool

Copyright © Ed2Net Learning, Inc.22 3. Which word describes the temperature of 55 °C? a)Hot b)Warm c)Cool d)Pleasant Answer- hot

Copyright © Ed2Net Learning, Inc.23 4. What could be the possible temperature on January 12? a) 15°c b) 29°C Answer- a

Copyright © Ed2Net Learning, Inc.24 5. The thermometer shows the temperature of 42°C. Tell whether the temperature is for June or December? Answer- June

Copyright © Ed2Net Learning, Inc.27 8. Choose the better estimate of the temperature in swimming pool. a) 50°F b) 100°F c) 10°F Answer- b

Copyright © Ed2Net Learning, Inc.28 9. The temperature rose from 10°F to 49°F on a particular day. What is the rise in the temperature? Answer- 39°F

Copyright © Ed2Net Learning, Inc.29 10. The temperature of the water in a pond is 8°C. Is the temperature above or below freezing point? Answer- above

Copyright © Ed2Net Learning, Inc.30 Recap The temperature is the degree of hotness or coldness of the body. Thermometer is used to measure temperature. Celsius (°C) and Fahrenheit (°F) are the units of measuring temperature. Solved examples Practice problems