what is the orographic/rain shadow effect? what does it cause? what is windward and leeward?

Brief Explanations:

The orographic/rain - shadow effect occurs when moist air is forced to rise over a mountain range. As air rises on the windward side, it cools and condenses, causing precipitation. By the time the air reaches the leeward side, it has lost much of its moisture, resulting in a drier area called the rain - shadow. The windward side is the side of the mountain facing the prevailing wind, where precipitation is more common. The leeward side is the side of the mountain sheltered from the prevailing wind, which is typically drier.

Answer:

The orographic/rain - shadow effect is the phenomenon where moist air rising over a mountain causes precipitation on the windward side and a drier area on the leeward side. It causes differences in precipitation levels between the two sides of a mountain range. The windward side is the side facing the prevailing wind with more precipitation, and the leeward side is the sheltered side with less precipitation.