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Item EB055001: During photosynthesis, more energy is required to break bonds between molecules of CO2 and H2O than is released as bonds form between molecules of C6H12O6 and O2.

Photosynthesis is a chemical reaction that occurs in a plant as the sun shines on it. Which of the following models illustrates the energy changes that occur during photosynthesis?

Pre-Test

Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 124
6–8
n = 0
9–12
n = 105
Male
n = 60
Female
n = 49
English
n = 95
Other
n = 6
A. 39% NAN% 40% 42% 35% 41% 33%
B. 23% NAN% 23% 22% 24% 20% 33%
C. 21% NAN% 23% 22% 24% 23% 33%
D. 17% NAN% 14% 15% 16% 16% 0%

Post-Test

Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 146
6–8
n = 0
9–12
n = 134
Male
n = 73
Female
n = 59
English
n = 122
Other
n = 10
A. 36% NAN% 36% 33% 39% 34% 50%
B. 20% NAN% 20% 18% 22% 19% 40%
C. 30% NAN% 28% 37% 20% 30% 0%
D. 14% NAN% 16% 12% 19% 16% 10%