Our Environment — Class 1 Environmental Science (Samacheer Kalvi)
TN State Board (Samacheer Kalvi) Class 1 Environmental Science, Chapter 4. Keeping surroundings clean.
1. About this chapter
This chapter covers Our Environment as part of the Class 1 Samacheer Kalvi Environmental Science curriculum. It deals with keeping surroundings clean and builds conceptual understanding essential for the TN School Term Exam.
By the end of this chapter, students will be able to:
- Describe the local environment
- Understand the need to keep surroundings clean
2. Key concepts
- Concept 1: Describe the local environment.
- Concept 2: Understand the need to keep surroundings clean.
3. Important terms and formulas
| Term / Formula | Description |
|---|---|
| Describe the local environment… | Describe the local environment |
| Understand the need to… | Understand the need to keep surroundings clean |
4. Worked examples
Example 1. Applying a key concept from this chapter.
Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.
Example 2. A typical exam-style question on our environment.
Solution: Break the problem into steps, use the appropriate formula and verify the answer.
5. Common mistakes
- Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
- Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.
6. Practice (exam-style)
- Define the main term or principle covered in Chapter 4.
- Give two real-life examples related to our environment.
- Solve a short numerical or descriptive question from this chapter.
- State one important formula and explain each symbol.
7. Answer key (hints)
- Refer to section 2 (Key concepts) above for the definition.
- Examples should be drawn from daily experience and local context.
- Apply the formula from section 3, show all steps clearly.
- Formula with units — refer to the textbook glossary for symbol meanings.
8. Quick revision
- Class 1 Environmental Science — Chapter 4: Our Environment.
- Core idea: Keeping surroundings clean.
- Key outcomes: Describe the local environment; Understand the need to keep surroundings clean.
- Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.
