Skip to main content
Super TutorResources
Chapter 2 of 13
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

The Invisible Living World: Beyond Our Naked Eye

CBSE · Class 8 · Science

Quick revision notes for The Invisible Living World: Beyond Our Naked Eye — CBSE Class 8 Science. Key concepts, formulas, and definitions for last-minute revision.

45 questions70 flashcards5 concepts

Interactive on Super Tutor

Studying The Invisible Living World: Beyond Our Naked Eye? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

1,000+ Class 8 students started this chapter today

Key Topics to Revise

1

1. Discovering the Invisible World

  • A curved piece of glass called a lens can make small objects look bigger.
  • Robert Hooke published Micrographia in 1665 and used a microscope that magnified objects 200 to 300 times.
  • Hooke observed a thin slice of cork made of many small empty spaces and called each space a cell.
2

2. Cell Structure and Differences

  • A typical cell has three main parts: cell membrane, cytoplasm, and nucleus.
  • The cell membrane encloses the cytoplasm and nucleus, separates one cell from another, and is porous.
  • The cytoplasm contains carbohydrates, proteins, fats, and mineral salts; most life processes take place there.
3

3. Microorganisms and Their Types

  • Microorganisms are living organisms too small to be seen with the naked eye.
  • They are found in water, soil, air, and even inside the body.
  • A microscope magnifies microorganisms so they can be seen.
4

4. Helpful Microorganisms in Daily Life

  • Lactobacillus feeds on lactose in milk, multiplies, and ferments milk to form curd.
  • Curd forms in warm conditions because Lactobacillus grows well in warmth and produces lactic acid.
  • Besides yeast, bacteria such as Lactobacillus help ferment batter for idli and dosa and dough for bhatura.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

A microscope makes tiny objects lookA cell is the basic unitThe cell membrane is the outerCytoplasm is the part ofThe nucleus is a round structure

Frequently Asked Questions

What are the important topics in The Invisible Living World: Beyond Our Naked Eye for CBSE Class 8 Science?
The Invisible Living World: Beyond Our Naked Eye covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in The Invisible Living World: Beyond Our Naked Eye — CBSE Class 8 Science?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for The Invisible Living World: Beyond Our Naked Eye

All 13 chapters — CBSE Class 8 Science Revision Notes

For serious students

Get the full The Invisible Living World: Beyond Our Naked Eye chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for CBSE Class 8 Science.

Try Super Tutor Free
Try the full chapter — Free