As part of an experiment in the science lab, a thermometer was inserted in a solution in order to measure the temperature over time. At 9:15 a.m. the temperature was –17 °C, and at 11:30 a.m. it was –26 °C.
What is the difference between these two measurements?
A.
8 °C
B.
9 °C
C.
11 °C
D.
43 °C
The difference between these two measurements can be found by subtracting the initial temperature from the final temperature.
Final Temperature - Initial Temperature = Difference
(-26 °C) - (-17 °C) = -26 °C + 17 °C = -9 °C
Therefore, the difference between the two measurements is 9 °C, so the answer is B. 9 °C.