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Item RG205001: Chemical energy is converted into thermal energy and kinetic energy (motion energy) as runners run.

Two runners line up at the starting line of a track. Then their friend blows a whistle to start the race. The runners run as fast as they can to the finish line. During the race, both runners get warmer and start to sweat. Which of the following describes how energy changes while the runners are running?

  1. The runners make thermal energy and kinetic energy (motion energy) as they run.
  2. Thermal energy is converted into kinetic energy (motion energy) as they run.
  3. Chemical energy is converted into thermal energy and kinetic energy (motion energy) as they run.
  4. Some of the matter that makes up the runners is converted into thermal energy and kinetic energy (motion energy) as they run.
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 1683
4–5
n = 297
6–8
n = 843
9–12
n = 543
Male
n = 758
Female
n = 888
English
n = 1514
Other
n = 128
A. The runners make thermal energy and kinetic energy (motion energy) as they run. 39%42% 39% 38% 39% 40% 40% 34%
B. Thermal energy is converted into kinetic energy (motion energy) as they run. 17%20% 15% 18% 16% 17% 17% 14%
C. Chemical energy is converted into thermal energy and kinetic energy (motion energy) as they run. 28%23% 30% 28% 30% 27% 28% 38%
D. Some of the matter that makes up the runners is converted into thermal energy and kinetic energy (motion energy) as they run. 16%16% 16% 15% 15% 16% 15% 14%