MEGA
Energy Changes
A decrease in energy in one object or set of objects always is accompanied by an increase in energy in another o…
Item EC068002: When a warmer block comes in contact with cooler air, the energy of the air will increase and the energy of the block will decrease.
A box was designed to prevent matter and energy from entering or leaving it. The box contains a thermometer that measures the temperature of the air inside of the box. At Time 1, a person places a wooden block inside of the box and records the temperature. Ten minutes later (Time 2), the person records the temperature again and notices that the temperature of the air inside of the box has increased.
Which of the following graphs represent the energy changes of the air and block that occur from Time 1 to Time 2?
Pre-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 292 |
6–8 n = 0 |
9–12 n = 251 |
Male n = 151 |
Female n = 105 |
English n = 235 |
Other n = 18 |
||
| A. |
 |
9% | NAN% | 8% | 11% | 4% | 8% | 0% |
| B. |
 |
32% | NAN% | 33% | 35% | 30% | 33% | 44% |
| C. |
 |
30% | NAN% | 29% | 28% | 31% | 31% | 11% |
| D. |
 |
29% | NAN% | 29% | 26% | 35% | 28% | 44% |
Post-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 317 |
6–8 n = 0 |
9–12 n = 285 |
Male n = 159 |
Female n = 123 |
English n = 265 |
Other n = 17 |
||
| A. |
|
9% | NAN% | 9% | 9% | 9% | 9% | 12% |
| B. |
|
26% | NAN% | 26% | 21% | 33% | 26% | 18% |
| C. |
|
44% | NAN% | 43% | 45% | 39% | 43% | 47% |
| D. |
|
21% | NAN% | 22% | 25% | 20% | 22% | 24% |