Original Project
Evolution and Natural Selection
Environmental conditions have changed in the past and continue to change today.
Item EN020002: Many changes to the physical environment have happened from the time that earth was formed until the present day.
What is TRUE about how the physical environment of the earth has changed over time? The diagram below represents a timeline showing key events mentioned in the answer choices.
.jpg)
- Many changes to the physical environment happened before life began, but hardly any changes have happened since the time that life began.
- Many changes to the physical environment happened after life began but before humans appeared. Hardly any changes happened before life began or after humans appeared.
- Many changes to the physical environment happened after humans appeared, but hardly any changes had happened before humans appeared.
- Many changes to the physical environment have happened from the time that earth was formed until the present day.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 2144 | 4678 | 46% |
| Grades | |||
| 6–8 | 1270 | 2927 | 43% |
| 9–12 | 874 | 1751 | 50% |
| Gender | |||
| Male | 998 | 2221 | 45% |
| Female | 1108 | 2346 | 47% |
| Primary Language | |||
| English | 1952 | 4179 | 47% |
| Other | 144 | 372 | 39% |
- Notes
- "Environmental change" is an important idea in LS4.C, especially the effect that environmental change has on the continuous process of adaptation by natural selection.