"Heavy rains on the west side of the mountains
and deserts on the east side"
Moving air over mountains is called lee waves. See related link.
warmth and evaporation
The answer is 7
When a high humidity air mass moves inland and up a mountain slope, it will cool as it rises, leading to the condensation of water vapor and the formation of clouds. This can result in increased precipitation on the windward side of the mountain due to orographic lift. As the air mass descends on the leeward side, it warms and dries out, creating a rain shadow effect where the area experiences less rainfall.
Wind is blowing air up over the mountain. Going from about 1,000 feet at the base to 7,000 feet at the top, the temperature changes as the air goes over the mountain.
A wind is a moving air mass. If the air mass has passed over a large ocean, it could mean clouds and rain falling over an area.
warmth and evaporation
The answer is 7
As air moves up a mountain slope, it cools adiabatically causing the air to reach its dew point temperature and condense into water droplets, forming clouds. This process is known as orographic lifting.
The leeward side of a mountain range is in a rain shadow, which occurs when air loses moisture as it rises over the mountain and descends on the other side, creating a dry climate. This descending air warms up and cannot hold as much moisture, resulting in less precipitation on the leeward side.
On the windward side of a mountain range, air rises, cools, and drops its moisture. On the leeward side of a mountain range air descends, heats up, and dries the land. Deserts are common behind mountains. (493) Glencoe Texas Science, Grade 8 © 2002
leeward
On the wet side the air is pushed upward in the dry side cool air moves down ward and dries out
bald eagle
This phenomenon is known as the rain shadow effect. As moist air is forced to rise over a mountain range, it cools and releases precipitation on the windward side. By the time the air descends on the leeward side, it is drier and has lost much of its moisture, resulting in a drier climate on that side of the mountain range.
A rain shadow is a dry area on the lee side of a mountainous area. The mountains block the passage of rain-producing weather systems casting a "shadow" of dryness behind them. As shown by the diagram to the right, the warm moist air is "pulled" by the prevailing winds over a mountain. Then it condenses and precipitates and the dry air moves forward leaving a rain shadow behind the mountain.
Air containing water vapour cools as it rises over a mountain. This can cause the vapour to condense and form rain.
Orographic rainfall occurs when moist air is forced upwards by a barrier, such as a mountain range, leading to the air cooling and condensing to form clouds and precipitation. As the air rises over the barrier, it cools and releases moisture, resulting in increased rainfall on the windward side of the mountain range.