Class 8 Science Chapter 2: The Invisible Living World: Beyond Our Naked Eye — practice questions with answers
Free practice for Class 8 Science, Chapter 2: The Invisible Living World: Beyond Our Naked Eye. Try the solved questions below, then take a free test with instant marking and explanations.
52 questions17 easy, 27 medium, 8 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. Why was the lens given that name?
- It was shaped like a lentil seed — thick in the middle and thin at the edges
- It was invented by Lens
- It is made of lentils
- It looks like an eye
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Answer: A. It was shaped like a lentil seed — thick in the middle and thin at the edges
Why: Lenses made small things look bigger. [p.9]
Why: Lenses made small things look bigger. [p.9]
Q2. What did Robert Hooke see in a thin slice of cork?
- Many small empty compartments, which he called cells
- Bacteria
- Blood cells
- Chloroplasts
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Answer: A. Many small empty compartments, which he called cells
Why: Published in Micrographia, 1665. [p.10]
Why: Published in Micrographia, 1665. [p.10]
Q3. Why is safranin added to onion peel before viewing?
- It stains the cells pink so they can be seen clearly
- It kills germs
- It dissolves the cell wall
- It makes cells bigger
Show answer
Answer: A. It stains the cells pink so they can be seen clearly
Why: Stains improve contrast. [p.11]
Why: Stains improve contrast. [p.11]
Q4. Which part of the cell regulates all its activities and growth?
- Nucleus
- Cell wall
- Vacuole
- Cell membrane
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Answer: A. Nucleus
Why: The nucleus is the control centre. [p.13]
Why: The nucleus is the control centre. [p.13]
Q5. Green plastids that contain chlorophyll and help in photosynthesis are called ______.
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Answer: chloroplasts
Why: In non-green parts, plastids store substances. [p.13]
Why: In non-green parts, plastids store substances. [p.13]
Q6. Living organisms too small to be seen with the naked eye are called ______.
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Answer: microorganisms
Why: Micro = very small. [p.15–16]
Why: Micro = very small. [p.15–16]
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Frequently asked questions
How many practice questions are there for Class 8 Science Chapter 2: The Invisible Living World: Beyond Our Naked Eye?
52 questions (17 easy, 27 medium, 8 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 8 Science syllabus, used by CBSE and many state boards.