ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG209001: The chemical energy of the products of cellular respiration is less than the chemical energy of the reactants (item includes bar graphs).
Cellular respiration is a chemical reaction that occurs in plants and animals. During this reaction, molecules from food and oxygen (the reactants) react to form carbon dioxide and water (the products). Which of the following graphs shows how the chemical energy of the reactants compares to the chemical energy of the products?
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 521
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 308 | 962 | 32% |
| Grades | |||
| 4–5 | N/A | N/A | N/A |
| 6–8 | 200 | 614 | 33% |
| 9–12 | 108 | 348 | 31% |
| Gender | |||
| Male | 145 | 435 | 33% |
| Female | 156 | 501 | 31% |
| Primary Language | |||
| English | 263 | 841 | 31% |
| Other | 38 | 98 | 39% |
- Disciplinary Core Ideas
- PS1.B Some chemical reactions release energy, others store energy.
PS3.D Cellular respiration in plants and animals involve chemical reactions with oxygen that release stored energy. In these processes, complex molecules containing carbon react with oxygen to produce carbon dioxide and other materials.