Original Project
Weather and Climate II: Seasonal Differences
The earth’s spherical shape causes differences in the intensity of sunlight and thus the amount of energy from…
Item CL071002: Sunlight strikes the earth at a 90° angle at only one place at any given time.
Where and when is sunlight striking the earth at a 90° angle?
- At only one place on the sunlit side of the earth at any given time during a year
- At only one place on the sunlit side of the earth, but this happens only on the first day of summer
- At every place on the sunlit side of the earth, all year long
- At every place on the sunlit side of the earth, but only when it is noon at that place
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 598 | 2139 | 28% |
| Grades | |||
| 6–8 | 343 | 1182 | 29% |
| 9–12 | 252 | 946 | 27% |
| Gender | |||
| Male | 287 | 1056 | 27% |
| Female | 302 | 1033 | 29% |
| Primary Language | |||
| English | 519 | 1862 | 28% |
| Other | 61 | 216 | 28% |
- Disciplinary Core Ideas
- ESS1.A Patterns of the apparent motion of the sun, the moon, and stars in the sky can be observed, described, predicted, and explained with models.
ESS1.B The orbits of Earth around the sun and of the moon around Earth, together with the rotation of Earth about an axis between its North and South poles, cause observable patterns. These include day and night; daily changes in the length and direction of shadows; and different positions of the sun, moon, and stars at different times of the day, month, and year.