Session 2: Wind and Air Movement

Key Idea

What happens when the wind runs into a mountain? The mountain is part of the geosphere. It is a solid object that air cannot pass through.

The mountain acts as a massive barrier. It blocks the wind's forward path. Since the wind cannot go through the rock, and it cannot go down into the ground, it has only one way to go: up.

Key Idea

When the wind hits the mountain, it is redirected. The slope of the mountain forces the air to flow upward toward the peak.

This is a critical interaction between Earth's systems. The shape of the land forces the atmosphere to change direction. As the air rises, it carries its invisible cargo—the water vapor—higher and higher into the sky.

Key Idea

If the mountain weren't there, the wind and water vapor might stay close to the ground. But the landform changes everything.

By pushing the air up, the mountain sends water vapor into higher parts of the atmosphere. As we learned before, high altitude means cold temperatures. This redirection sets the stage for weather changes like clouds and rain.