Learn on PengiAmplify Science (California) Grade 5Chapter 4: Why is there more water vapor high up over West Ferris than East Ferris?

Session 3: The Water Cycle System

Key Idea.

Section 1

The Rain Shadow Effect

Key Idea

The interaction between wind and mountains creates a specific weather pattern. On the side of the mountain facing the wind, the air rises, cools, and drops rain. This side is wet and green.

By the time the air crosses the peak and goes down the other side, it has lost its moisture. This dry area on the sheltered side of the mountain is called a rain shadow. This explains why one city can be rainy while a nearby city is dry.

Section 2

Identifying System Parts

Key Idea

To understand this complex event, scientists break it down into the parts of the system.

The components include the energy (Sun), the matter (water vapor and air), and the physical structures (mountains). Identifying these parts helps us see how the whole machine works.

Section 3

Connecting the Interactions

Key Idea

A system is defined by how its parts interact. In the rain shadow example, we see a chain reaction:

  1. Solar energy causes evaporation.
  2. Wind moves the vapor.
  3. The geosphere (mountain) lifts the air.
  4. The atmosphere cools the vapor into rain.

All these interactions work together to shape the climate of a region.

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

The Rain Shadow Effect

Key Idea

The interaction between wind and mountains creates a specific weather pattern. On the side of the mountain facing the wind, the air rises, cools, and drops rain. This side is wet and green.

By the time the air crosses the peak and goes down the other side, it has lost its moisture. This dry area on the sheltered side of the mountain is called a rain shadow. This explains why one city can be rainy while a nearby city is dry.

Section 2

Identifying System Parts

Key Idea

To understand this complex event, scientists break it down into the parts of the system.

The components include the energy (Sun), the matter (water vapor and air), and the physical structures (mountains). Identifying these parts helps us see how the whole machine works.

Section 3

Connecting the Interactions

Key Idea

A system is defined by how its parts interact. In the rain shadow example, we see a chain reaction:

  1. Solar energy causes evaporation.
  2. Wind moves the vapor.
  3. The geosphere (mountain) lifts the air.
  4. The atmosphere cools the vapor into rain.

All these interactions work together to shape the climate of a region.