If Earth's spin axis were perpendicular to Earth's orbital plane (the ecliptic plane), then the seasons and seasonal variation would be:

Question

Quizplus · Accepted Answer

The seasons are caused by the tilt of Earth's axis, which creates a variation in the amount of sunlight received by different parts of the planet at different times of the year. If the axis were perpendicular to the ecliptic plane, there would be no variation in the amount of sunlight received throughout the year, and thus no seasons.

If Earth's Spin Axis Were Perpendicular to Earth's Orbital Plane