Question

north pole
equator
south pole
trade winds
trade winds
why do these winds curve instead of going straight toward the equator?

Explanation:

The curving of trade winds (instead of moving straight to the equator) is due to the Coriolis effect. The Earth's rotation causes moving air (and other objects) to be deflected: in the Northern Hemisphere, to the right, and in the Southern Hemisphere, to the left. This deflection alters the path of the trade winds, making them curve as they move toward the equator.

Answer:

The winds curve because of the Coriolis effect, which is caused by the Earth's rotation. The Earth's rotation deflects the moving air (trade winds) as they travel toward the equator, resulting in their curved path (right - deflection in the Northern Hemisphere, left - deflection in the Southern Hemisphere).