📝 Lesson Practice
🗣️ English Goal
Explain causes, effects and connected processes clearly using precise sustainability vocabulary and practical language.
🌱 Sustainability Goal
Understand how environmental changes happen step-by-step, including causes, effects and feedback loops, and how different parts of nature and society connect in these changes.
💭 Warm-Up Question
Can you think of one cause and one effect of environmental change in your local area?
📖 Short Reading
Environmental changes often happen because of a series of connected causes and effects. For example, deforestation is a cause that can lead to soil erosion. When many trees are removed, the soil loses protection and can wash away with rain. This erosion reduces the land's ability to grow crops, affecting food supply for local communities. Furthermore, less tree cover means less carbon dioxide is absorbed, which may increase greenhouse gases in the atmosphere. This change then contributes to climate change, such as higher temperatures or irregular rainfall. Because these effects link to one another, they create a chain of changes. Sometimes, these chains form feedback loops, where one effect strengthens the original cause. For instance, climate change can make trees weaker and more likely to die, which leads to more deforestation. Understanding these chains helps us find solutions that address both the causes and the effects. For example, reforestation can prevent soil erosion and help balance carbon levels. Communities, governments and businesses must work together to break harmful chains and support sustainable systems that protect nature and human well-being.
🔎 Check Your Understanding
1.
What does the passage say about deforestation?
2.
What is a feedback loop in environmental change?
3.
Why is understanding chains of environmental change important?
4.
What does reforestation help with, according to the reading?
📚 Key Vocabulary
| Word or phrase | Simple meaning | Example |
|---|---|---|
| chain of changes | A sequence of connected causes and effects that happen one after another | Deforestation causes soil erosion, which is part of a chain of changes affecting the environment. |
| soil erosion | Loss of the top layer of soil, often caused by wind or water | Soil erosion happens when trees are cut down and rain washes the soil away. |
| feedback loop | A process where an effect increases or decreases the original cause | In a feedback loop, climate change can kill trees, which causes more climate change. |
| greenhouse gases | Gases in the atmosphere that trap heat and affect the climate | Carbon dioxide is a greenhouse gas that increases when trees are cut down. |
| deforestation | Cutting down large areas of trees or forests | Deforestation is a main cause of soil erosion and changes in climate. |
| carbon dioxide absorption | The process where plants take in carbon dioxide from the air | Trees help reduce climate change by carbon dioxide absorption. |
| irregular rainfall | Rainfall that is unpredictable or changes from usual patterns | Climate change can cause irregular rainfall, making farming difficult. |
| connected processes | Events or changes that are linked and influence each other | Environmental challenges often result from connected processes like pollution and habitat loss. |
| sustainable system | A method or approach that keeps nature and human needs balanced over time | Planting trees creates a sustainable system that helps the environment. |
| reforestation | The act of planting trees to replace ones that were cut down | Reforestation can help stop soil erosion and improve local climates. |
💬 Useful Language
describing a problem:
One key problem is that this change causes a chain reaction.
explaining a cause:
This happens because of several connected factors.
explaining an effect:
As a result, this leads to further environmental impacts.
comparing choices:
Compared to the alternative, this option has more long-term benefits.
suggesting a solution:
A practical solution could be to focus on restoring natural areas.
expressing an opinion:
In my view, understanding these chains is essential to effective action.
💬 Dialogue
🙂 Alex: Have you noticed how deforestation can affect other parts of the environment?
😀 Sam: Yes, cutting down trees can cause soil erosion, which harms local crops.
🙂 Alex: Exactly. And when soil washes away, it creates a chain of changes that impact communities.
😀 Sam: I think the feedback loops are especially interesting. For example, soil erosion leads to less plant growth.
🙂 Alex: Right. That means fewer plants absorb carbon dioxide, which may increase greenhouse gases.
😀 Sam: And that then causes changes in climate, like irregular rainfall or higher temperatures.
🙂 Alex: A practical solution is reforestation because it can stop erosion and help balance carbon levels.
😀 Sam: I agree. Understanding how causes and effects connect helps us recommend better solutions.
✏️ Exercise 1 – Fill in the Blanks
1.
Deforestation often causes ____ by removing protective tree cover. (soil erosion / acid rain / pollution)
2.
A ____ loop occurs when an effect increases its original cause. (action / feedback / reduction)
3.
Reforestation is a ____ that can reduce environmental damage. (problem / cause / solution)
4.
When trees absorb carbon dioxide, they help reduce ____. (greenhouse gases / energy use / water pollution)
5.
Irregular rainfall is an ____ caused by climate change. (cure / effect / advantage)
6.
Understanding chains helps to explain connected ____. (rubbish / studies / processes)
🔗 Exercise 2 – Matching
1.
Deforestation
2.
Soil erosion
3.
Feedback loop
4.
Reforestation
5.
Greenhouse gases
✅ Exercise 3 – Multiple Choice
1.
Which phrase means a sequence of connected causes and effects?
2.
What happens when soil erosion increases?
3.
Why is carbon dioxide absorption important?
4.
Which is a practical solution to stop soil erosion?
5.
How does understanding environmental chains help?
🧩 Mini Practice
Practice answering aloud.
Say: Deforestation causes soil erosion.
Say: This creates a feedback loop that increases environmental problems.
Say: Climate change can cause irregular rainfall in many regions.
Say: Reforestation helps prevent soil erosion and balance carbon levels.
Ask: Can you explain one effect of deforestation in your community?
Say: In my community, deforestation has caused less rainfall and made farming harder.
Ask: What is one solution to improve chains of environmental change in your area?
Say: One solution could be planting more trees to reduce soil erosion and protect the land.
🌿 Small Sustainability Action
Observe one local environmental change around you and try to think about what caused it and what effects it may have.
📝 Reflection
How do environmental changes in your area create a chain of effects that impact your community or work?
🧭 Lesson Summary
In this lesson, you practised explaining causes, effects and connected processes clearly. You learned how environmental changes form chains and feedback loops. Understanding these connections helps us support sustainable solutions calmly and effectively.
🔎 Answer Key
Check Your Understanding
- It causes soil erosion and reduces carbon dioxide absorption.
- A cycle where an effect strengthens the original cause.
- Because it helps to identify both causes and effects for better solutions.
- Preventing soil erosion and improving carbon balance.
Exercise 1 – Fill in the Blanks
- soil erosion
- feedback
- solution
- greenhouse gases
- effect
- processes
Exercise 2 – Matching
- Deforestation – Cutting down large areas of trees
- Soil erosion – Loss of the topsoil layer by water or wind
- Feedback loop – Effect that increases its original cause
- Reforestation – Planting trees to replace lost forests
- Greenhouse gases – Gases that trap heat in the atmosphere
Exercise 3 – Multiple Choice
- Chain of changes
- Land becomes less fertile
- It reduces harmful greenhouse gases.
- Reforestation
- It helps find solutions that address both causes and effects.