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Lesson Menu Five-Minute Check (over Lesson 12–5) Main Idea and Vocabulary Example 1:Choose Reasonable Temperatures Example 2:Choose Reasonable Temperatures Example 3:Subtract Temperature

Main Idea/Vocabulary I will choose appropriate temperatures in degrees Fahrenheit and Celsius. degrees Celsius (°C) Fahrenheit (°F)

Example 1 Choose Reasonable Temperatures Which thermometer shows a more reasonable temperature for a swimming pool that is comfortable to swim in?

Example 1 Choose Reasonable Temperatures Body temperature is 98.6°F. 80°F would still be warm to the touch and be comfortable to swim in. 60°F is much less than body temperature and would be much colder to swim in. Answer: So, the more reasonable temperature is 80°F.

1.A 2.B Example 1 A.thermometer A B.thermometer B Which thermometer shows a more reasonable temperature for a freezer when making ice cubes? AB

Example 2 Choose Reasonable Temperatures Which is a more reasonable temperature for a spring day: 20°C or 40°C? 20°C is close to about 70°F, which is a warm day outside. 40°C is close to about 105°F, which is a very, very hot day outside. Answer: So, the more reasonable temperature for a spring day is 20°C.

1.A 2.B 3.C 4.D Example 2 A. 0°C B. 32°C C. 55°C D. 85°C Which is a more reasonable temperature for hot water?

Example 3 Subtract Temperature In early summer, a swimming pool had a temperature of 24°C. By the end of summer the temperature was 39°C. Find the change in temperature. Use an integer to represent the change.

Example 3 change in temperature = higher temperature – lower temperature = 39° – 24° = 15° Substitute the temperatures. Subtract. Subtract Temperature

Example 3 Subtract Temperature The temperature increased by 15 degrees. Answer: So, the change in temperature was 15°C. The integer to represent the change is +15. The change can be represented by the integer +15.

1.A 2.B 3.C 4.D Example 3 A.11°; +11 B.11°; –11 C.12°; +12 D.12°; –12 Yesterday the temperature was 68°F. Today the temperature is 79°F. Find the change in temperature. Use an integer to represent the change.

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Resources Five-Minute Check (over Lesson 12–5) Image Bank Math Tool Chest Metric Rulers

1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 12–5) A.+400; –400 B.–400; +400 C.+40; –40 D.–40; +40 Write an integer to represent the situation. Then write its opposite. 400 feet above sea level

1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 12–5) A.+5; –5 B.–5; +5 C.–50; +50 D.+50; –50 Write an integer to represent the situation. Then write its opposite. 5 degrees below 0

1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 12–5) A.–70; 70 B.70; –70 C.–7; +7 D.+7; –7 Write an integer to represent the situation. Then write its opposite. spent $7

1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 12–5) A.+20; –20 B.–20; +20 C.+200; –200 D.–200; +200 Write an integer to represent the situation. Then write its opposite. dove 20 feet below the surface

1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 12–5) A.+15,000; –15,000 B.–15,000; +15,000 C.+150,000; –150,000 D.–150,000; +150,000 Write an integer to represent the situation. Then write its opposite. flew at 15,000 feet altitude

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