Vanishing Sea Slides The Vanishing Sea
A Case Study in Human-Environment Interaction and the Aral Sea Crisis
Geography & Environment • Grades 7-8
The Mystery
Compare these two satellite views of the same location.
5 Minute Warm-up
1960
Abundant Water & Thriving Ecosystems
2010
Desertification & Salt Flats
What happened here? Discuss with a partner: What forces could cause a sea to vanish in 50 years?
Witness the Change
Focus on the Central Asia segment (6:09 - 7:00)
Embedded media
Watch the animation of the sea shrinking.
Listen for the specific reason: "Over-irrigation".
The Investigation
Why did the water disappear?
25 Minute Activity
Step 1: Cause & Effect
Read the "White Gold" article on your worksheet. Identify:
The **Human Cause** (What were they building?)
The **Economic Goal** (What crop were they growing?)
The **Environmental Consequences** (What happened to the land?)
Step 2: Warning Poster
Create a visual warning for future generations about water management.
Must include a **Bold Headline**.
Must include a **Powerful Visual**.
Must list **One Lesson** learned.
Reflection Journal
"Is economic growth worth environmental damage? Why or why not?"
Record your thoughts on your Reflection Journal page.
Vanishing Sea Worksheet Vanishing Sea Investigation
Environmental Case Study: The Aral Sea
Investigator:
Date:
PART 1
Reading: The Hunt for "White Gold"
In the 1960s, leaders of the Soviet Union embarked on a massive project in Central Asia. They wanted to transform the arid plains of Uzbekistan and Kazakhstan into a world-leading producer of **cotton**, a crop so valuable it was nicknamed **"White Gold."**
However, cotton is a "thirsty" crop—it requires immense amounts of water to grow in a desert. To solve this, engineers built thousands of miles of irrigation canals to divert water from the two main rivers of the region: the **Amu Darya** and the **Syr Darya**.
The problem? These two rivers were the only sources of water for the **Aral Sea**. As the rivers were drained for cotton fields, the sea began to shrink rapidly. What was once the world's fourth-largest inland body of water began to vanish.
The consequences were devastating. As the water evaporated, the salt concentration doubled, killing off the entire fishing industry. The exposed seabed became a desert of toxic dust, salt, and pesticides, which windstorms now blow into nearby cities, causing severe health problems for the local people.
PART 2
Cause and Effect Analysis
Human Modification (The Cause)
Identify the specific project or change made to the environment.
Economic Motivation (The Goal)
What were they trying to gain? Why did they do it?
Environmental Consequences (The Effects)
List at least 3 negative impacts mentioned in the text or video.
PART 3
Poster Workshop: Warning for the Future
Create a visual warning for future generations. Include a bold headline, a powerful visual sketch, and one key lesson learned.
Reflection Journal Prompts Reflection Journal
Unit: Human-Environment Interaction
Student:
Today's Essential Question
"Is economic growth worth environmental damage? Why or why not?"
My Thoughts
Consider the people of the Aral Sea region.
Think about the importance of "White Gold."
Vanishing Sea Answer Key Answer Key
Material: Vanishing Sea Worksheet
TEACHER REFERENCE
Part 2: Cause and Effect Analysis
Human Modification (The Cause)
Building thousands of miles of irrigation canals to divert water from the Amu Darya and Syr Darya rivers.
Economic Motivation (The Goal)
To transform the desert into farmland for mass cotton production ("White Gold") and become a global leader in the cotton industry.
Environmental Consequences (The Effects)
**Shrinkage of the Sea**: The Aral Sea lost most of its water volume, eventually splitting and drying up.
**Loss of Biodiversity**: Salt levels doubled, making the water too saline for fish to survive (collapsing the fishing industry).
**Toxic Dust Storms**: The dried seabed became a desert of salt and pesticides, which blow into nearby cities and cause health issues.
Part 3: Warning Poster (Criteria)
Requirement Expectation Bold Headline Catchy, warning-themed (e.g., "Don't Drain the Future," "The Thirsty Desert"). Powerful Visual Depicts the contrast between water and desert, or the impact on people/animals. Key Lesson Must connect human choices to long-term environmental sustainability.
