Concept:To assess understanding of seasonal changes, activities must directly involve the causes of seasons—length of day/night and Earth’s revolution around the Sun.
Explanation:Option A: Students note sunrise and sunset timings over six months from old newspapers. They compare day and night lengths and explain the reasons. This directly relates to how axial tilt and revolution cause seasonal variation in daylight.
Option C: Students explain Earth’s revolution and its link to seasons. This covers the orbital motion that, together with axial tilt, produces seasons.
Option B: Drawing an ellipse is a geometry activity and does not connect to seasons.
Option D: Calculating the next leap year is a calendar math exercise; it is not about the cause of seasons.
Only activities that focus on day-night duration changes or Earth’s revolution assess the understanding of seasons. Thus, A and C are suitable.
Answer:Only A and C (Option C in the list of choices).