Here's a breakdown:
* Northern Hemisphere: Imagine you're standing in the Northern Hemisphere and throwing a ball eastward. The Earth is rotating underneath you, so the point where you released the ball is now moving slightly westward. The ball, however, continues moving eastward, but now appears to be deflected to the right relative to your position.
* Southern Hemisphere: The same principle applies, but because the Earth rotates in the same direction (west to east), the deflection is reversed. A ball thrown eastward in the Southern Hemisphere will appear to deflect to the left.
Important Note: The Coriolis effect is only significant for objects moving over large distances and for extended periods. This is why you don't notice it when you throw a ball in your backyard, but it plays a significant role in weather patterns, ocean currents, and the paths of long-range projectiles.