Class 8 Science Chapter 2, The Invisible Living World: Beyond Our Naked Eye, begins with curved lentil-shaped glass lenses and microscopes, then explores cells, levels of organisation in living beings, and the hidden world of microorganisms.
What Class 8 Science Chapter 2 Covers
2.1 What Is a Cell? and 2.2 Levels of Organisation introduce the discovery of the cell, microscope observations (Activities 2.1 to 2.3), and how cells organise into tissues, organs, organ systems and complete organisms.
2.3 What Are Microorganisms? examines pond water and soil suspension under a microscope (Activities 2.4 to 2.6) to identify bacteria, fungi, protozoa, algae and microscopic animals.
2.4 How Are We Connected to Microbes? and 2.5 Basic Unit of Life show beneficial microbes in the kitchen (fermentation, curd, dough in Activities 2.7 to 2.9), nitrogen fixation and decomposition, alongside why the cell is the basic structural and functional unit of life.
Exercises in Chapter 2
- Keep the curiosity alive end-of-chapter questions and reasoning exercises.
- Discover, design, and debate and Projects for hands-on investigation.
Read Class 8 Science Chapter 2 Online
More Chapters
- Previous: Chapter 1: Exploring the Investigative World of Science
- Next: Chapter 3: Health: The Ultimate Treasure
- Hindi medium: Class 8 Science Chapter 2 PDF in Hindi (Jigyasa)
- All Science chapters and the other Class 8 books: Class 8 NCERT books 2026-27
- All Class 1 to 12 NCERT Textbooks: NCERT Books PDF (Class 1–12)
FAQ
Why is a lens called a lens?
Chapter 2 explains that early magnifying glasses were shaped like a lentil seed—thick in the middle and thin at the edge—from which the word ‘lens’ comes.
What are the levels of organisation in a living organism?
Cells group into tissues, tissues form organs, organs work together in organ systems, and organ systems make up the living organism.