The Invisible Living World: Beyond Our Naked Eye — Chapter Summary
CBSE · Class 8 · Science
Summary of The Invisible Living World: Beyond Our Naked Eye for CBSE Class 8 Science. Part of the CBSE Class 8 Science syllabus.
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Overview
Tiny living beings exist all around us in water, soil, air, food, and even inside the body. Many of them cannot be seen with the naked eye, so microscopes are used to study them. The chapter explains how cells were discovered, how living beings are built from cells, and how microorganisms can be use
Key Concepts
A microscope makes tiny objects look
A microscope makes tiny objects look larger. Robert Hooke used a microscope that magnified objects 200 to 300 times and observed cork slices. Antonie
A cell is the basic unit
A cell is the basic unit of life. All living beings are made up of one or more cells.
The cell membrane is the outer
The cell membrane is the outer layer of the cell. It encloses the cytoplasm and nucleus, separates one cell from another, and allows useful materials
Cytoplasm is the part of
Cytoplasm is the part of the cell between the cell membrane and the nucleus. It contains substances like carbohydrates, proteins, fats, and mineral sa
The nucleus is a round structure
The nucleus is a round structure in the middle of the cell. It is covered by a thin membrane and regulates all activities of the cell, including growt
Learning Objectives
- Understand how microscopes helped reveal the invisible living world
- Learn how Robert Hooke and Antonie van Leeuwenhoek contributed to the study of cells and microorganisms
- Identify the basic parts of a cell and their functions
- Compare plant cells and animal cells
- Recognise different shapes and functions of cells in the human body
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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