Item EB018002: The energy required to separate atoms of the reactants of photosynthesis is greater than the amount of energy released when products form.
A chemical reaction called photosynthesis occurs in a tree as the sun shines on it.
As the atoms that make up the reactant molecules are separated, is energy required or released? How does that amount of energy compare to the energy associated with forming the product molecules?
- Energy is required to separate atoms of the reactants. This amount of energy is less than the amount of energy released as atoms connect to form the products.
- Energy is required to separate atoms of the reactants. This amount of energy is greater than the amount of energy released as atoms connect to form the products.
- Energy is released as atoms of the reactants are separated. This amount of energy is greater than the amount of energy required to connect the atoms to form the products.
- Energy is released as atoms of the reactants are separated. This amount of energy is less than the amount of energy required to connect the atoms to form the products.
Pre-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 138 |
6–8 n = 0 |
9–12 n = 130 |
Male n = 76 |
Female n = 50 |
English n = 122 |
Other n = 7 |
||
| A. | Energy is required to separate atoms of the reactants. This amount of energy is less than the amount of energy released as atoms connect to form the products. | 22% | NAN% | 20% | 26% | 10% | 21% | 0% |
| B. | Energy is required to separate atoms of the reactants. This amount of energy is greater than the amount of energy released as atoms connect to form the products. | 30% | NAN% | 32% | 29% | 34% | 33% | 14% |
| C. | Energy is released as atoms of the reactants are separated. This amount of energy is greater than the amount of energy required to connect the atoms to form the products. | 28% | NAN% | 28% | 26% | 32% | 25% | 71% |
| D. | Energy is released as atoms of the reactants are separated. This amount of energy is less than the amount of energy required to connect the atoms to form the products. | 20% | NAN% | 20% | 18% | 24% | 20% | 14% |
Post-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 155 |
6–8 n = 0 |
9–12 n = 145 |
Male n = 92 |
Female n = 46 |
English n = 131 |
Other n = 10 |
||
| A. | Energy is required to separate atoms of the reactants. This amount of energy is less than the amount of energy released as atoms connect to form the products. | 23% | NAN% | 24% | 25% | 22% | 24% | 20% |
| B. | Energy is required to separate atoms of the reactants. This amount of energy is greater than the amount of energy released as atoms connect to form the products. | 35% | NAN% | 35% | 34% | 39% | 34% | 50% |
| C. | Energy is released as atoms of the reactants are separated. This amount of energy is greater than the amount of energy required to connect the atoms to form the products. | 25% | NAN% | 23% | 21% | 30% | 23% | 20% |
| D. | Energy is released as atoms of the reactants are separated. This amount of energy is less than the amount of energy required to connect the atoms to form the products. | 17% | NAN% | 17% | 21% | 9% | 18% | 10% |