2. Lesson Menu Main Idea and New Vocabulary NGSSS Example 1:Convert Temperatures Example 2:Convert Temperatures Example 3:Convert Temperatures Example 4:Convert Temperatures Five-Minute Check

3. Main Idea/Vocabulary Convert temperatures between the Fahrenheit and Celsius scales. degree Celsius (°C) Fahrenheit (°F)

4. NGSSS MA.8.G.5.1 Compare, contrast, and convert units of measure between different measurement systems (US customary or metric (SI)) and dimensions including temperature, area, volume, and derived units to solve problems. Also addresses MA.8.A.4.1

5. Example 1 Convert Temperatures Complete the conversion. Round to the nearest hundredth if necessary. 68°C = __°F Write the equation. Replace C with 68. Multiply. Simplify. Answer:So, 68°C = 154.4°F.

6. Example 1 CYP A.7.2 B.65 C.81 D.113 Complete the conversion. Round to the nearest hundredth if necessary. 45°C = __°F

7. Example 2 Complete the conversion. Round to the nearest hundredth if necessary. –25°C = __°F Convert Temperatures Write the equation. Replace C with –25. Multiply. Simplify. Answer:So, –25°C = –13°F.

8. Example 2 CYP A.–64.4 B.–32.4 C.–27.8 D.–0.4 Complete the conversion. Round to the nearest hundredth if necessary. –18°C = __°F

9. Example 3 Convert Temperatures SCIENCE The freezing point of salt water is –6° Fahrenheit. Write this temperature in degrees Celsius. Write the equation. Replace F with –6. Simplify. Multiply.

10. Example 3 Convert Temperatures Answer: The freezing point of salt water is about –21.1°C.

11. Example 3 CYP A.–17°C B.–9.4°C C.27°C D.59°C WEATHER The outside temperature is 15° Fahrenheit. Write this temperature in degrees Celsius. Round to the nearest tenth if necessary.

12. Example 4 VACATION Tomas is traveling to New Zealand in March. He read that the average temperature in March is 21° Celsius. Write this temperature in degrees Fahrenheit. Convert Temperatures Write the equation. Replace C with 21. Multiply. Simplify. Method 1 Use the equation F = C + 32. __ 9 5

13. Example 4 Convert Temperatures Write the equation. Replace C with 21. Simplify. Method 2 Use the equation C = (F – 32). __ 5 9 Multiply each side by. __ 9 5 Add 32 to each side. Simplify. 69.8 = F 37.8 = F – 32 + 32 __ 9 5 ● 21 = ● (F – 32) __ 9 5 5 9 21 = (F – 32) __ 5 9 C = (F – 32) __ 5 9

14. Example 4 Answer:The average temperature in March is about 69.8°F. Convert Temperatures

15. Example 4 CYP A.–16°F B.–8.9°F C.28.8°F D.60.8°F WATER The recent temperature of the water along the Pacific coast was 16° Celsius. Write this temperature in degrees Fahrenheit. Round to the nearest tenth if necessary.

16. A.17.2 B.31 C.113.4 D.145.4 Complete the conversion. Round to the nearest hundredth if necessary. 63ºC = __ºF Five Minute Check 1

17. A.215.6 B.183.6 C.70 D.38.8 Complete the conversion. Round to the nearest hundredth if necessary. 102ºC = __ºF Five Minute Check 2

18. A.–14 B.–7.78 C.32.4 D.64.4 Complete the conversion. Round to the nearest hundredth if necessary. __ºC = 18ºF Five Minute Check 3

19. A.203.4 B.171.4 C.81 D.45 Complete the conversion. Round to the nearest hundredth if necessary. __ºC = 113ºF Five Minute Check 4

20. A.Subtract 459.67 from 95. Then multiply by 5 and divide by 9. B.Multiply 95 by 5. Then divide by 9 and add 459.67. C.Add 459.67 to 95. Then multiply by 5 and divide by 9. D.Multiply 95 by 5. Then divide by 9 and subtract 459.67. The formula can be used to convert temperatures from the Kelvin scale to the Fahrenheit scale. Which of the following shows the correct steps to convert 95ºF to Kelvin? Five Minute Check 5