Change between Celsius and Fahrenheit

Answer Key - Grade 7 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Ari's pool water is 25 °C (perfect for a cannonball). What is that in °F?

   77 °F
2. 2.

   A spring morning at Bo's bus stop is 10 °C. What is that in °F?

   50 °F

3. Read this first

   Reference temperatures (F = 9/5 × C + 32)

   event	Celsius	Fahrenheit
   water freezes	0 °C	32 °F
   room temperature	20 °C	68 °F
   body temperature	37 °C	98.6 °F
   water boils	100 °C	212 °F

4. 3.

   Using the table, what is 100 °C in Fahrenheit, Jun?

   • 212 °F
   • 132 °F
   • 100 °F
5. 4.

   Using the table, what is normal body temperature in Celsius, Kira?

   • 37 °C
   • 20 °C
   • 98.6 °C
6. 5.

   Using the table, at what Fahrenheit temperature does water freeze, Luz?

   • 0 °F
   • 100 °F
   • 32 °F
7. 6.

   In F = 9/5 × C + 32, what does Milo do first to a Celsius reading?

   • Multiply it by 9/5
   • Divide it by 32
   • Add 32 to it
8. 7.

   In C = 5/9 × (F − 32), what does Noah do first to a Fahrenheit reading?

   • Subtract 32
   • Multiply by 5/9
   • Add 32
9. 8.

   Pia writes 9/5 as a decimal to use in the formula. What is it?

   • 1.8
   • 1.4
   • 0.6
10. 9.

    Which is warmer for Ren's picnic: 30 °C or 80 °F?

    • 30 °C
    • 80 °F
    • They are the same
11. 10.

    Which is warmer for Tala's bedroom: 20 °C or 70 °F?

    • 70 °F
    • 20 °C
    • They are the same