Question

which accurately describes one way that coastal mountains affect a regions climate?
o they determine the way that large masses of cool, dry air move over land.
o they control the amount of water vapor present in cool, dry air masses.
o they decrease precipitation on the windward sides of mountain ranges.
o they force cool, moist air from oceans to rise as it moves toward land.

Explanation:

Coastal mountains act as a barrier. When moist air from the ocean (which is cool) moves towards land (towards the mountains), the mountains force this air to rise. As the air rises, it cools further (adiabatic cooling), and the moisture in it condenses, leading to precipitation on the windward side.

• Option 1: Large - scale air mass movement (like trade winds, jet streams) is more related to global pressure systems and the Coriolis effect rather than coastal mountains determining the movement of large - scale cool, dry air masses.
• Option 2: The amount of water vapor in an air mass is mainly related to the source region of the air mass (e.g., over an ocean for a moist air mass, over a desert for a dry air mass) and not directly controlled by coastal mountains.
• Option 3: Precipitation is actually increased on the windward side of mountain ranges due to orographic lifting (the process of air rising over mountains).

Answer:

They force cool, moist air from oceans to rise as it moves toward land.