Class 8
Science
Chapter 2
Curiosity (latest NCERT)
The Invisible Living World: Beyond Our Naked Eye
Free NCERT practice questions for Class 8 Science, Chapter 2 — 67 questions across MCQs, short-answer, long-answer and more. Download a printable PDF worksheet in seconds. No signup, no ads, no paywall.
What this chapter covers
Class 8 Science Chapter 2 'The Invisible Living World: Beyond Our Naked Eye' from NCERT Curiosity introduces the microscopic world. Students meet bacteria, fungi, algae, protozoa and viruses, learn how cells differ between plants, animals and bacteria, and see how microbes are useful (fermentation, decomposition, antibiotics) as well as harmful (disease, food spoilage). The chapter ties everything to observations students can make through hand-lens and microscope.
Key topics in this chapter
- Bacteria, fungi, algae, protozoa, viruses
- Plant, animal and bacterial cells
- Useful microorganisms: fermentation, antibiotics
- Microbial diseases and food spoilage
- Pasteurisation and preservation
Sample questions from this chapter
Here are 6 real questions students will encounter when they generate a worksheet for this chapter. Every question includes the answer.
MCQ
Medium
1 mark
Which cell part is NOT present in a typical animal cell?
(a) Cell membrane
(b) Nucleus
(c) Cell wall
(d) Cytoplasm
Answer: Cell wall
Short Answer
Medium
3 marks
Differentiate between a plant cell and an animal cell.
Answer: • Plant cell has a cell wall; animal cell does not.
• Plant cell has chloroplast for photosynthesis; animal cell does not.
• Plant cells are usually rectangular; animal cells are usually rounded.
Fill in the Blank
Medium
1 mark
Bacteria in root nodules of legumes trap __________ from the air.
Answer: nitrogen
Very Short
Medium
1 mark
Name the three main parts of a typical cell from the chapter summary.
Answer: Cell membrane, cytoplasm and nucleus.
True / False
Medium
1 mark
State True or False: Bacteria have a well-defined nucleus.
Answer: False. Bacteria lack a well-defined nucleus.
Long Answer
Hard
5 marks
Describe the structure of a typical cell and the role of each part.
Answer: • Cell membrane: the outer boundary; controls what enters and leaves.
• Cytoplasm: jelly-like fluid that holds the cell parts.
• Nucleus: controls the activities of the cell.
• Cell wall (plant, fungal, bacterial only): extra rigid covering for support.
• Chloroplast (plant only): carries out photosynthesis.
Generate a worksheet with all 67 questions →
Frequently asked questions
What is included in Class 8 Science Chapter 2 (The Invisible Living World: Beyond Our Naked Eye)?
This chapter has 67 NCERT-aligned practice questions covering all the concepts from the Curiosity textbook's Chapter 2. Questions span easy, medium and hard levels across 9 different formats so students get a balanced practice set.
Are these questions based on the new NCERT Curiosity textbook?
Yes. Every question on Practico for Class 8 Science is mapped directly to the latest NCERT Curiosity textbook (the one CBSE schools are using now). The chapter numbers and chapter titles match the textbook exactly.
How many questions can I practice from this chapter?
67 questions are available right now. You can pick how many you want at a time — generate 10 quick MCQs, a 30-question worksheet, or a full exam-style mix. Each generation gives you a different random set.
Can I download a free PDF worksheet for The Invisible Living World: Beyond Our Naked Eye?
Yes — completely free, no sign-up required. Pick this chapter, choose the number of questions and types you want, and download a printable PDF (with or without answers) in one click.
What question types are available?
This chapter has assertion reason, fill blank, image, long, match, mcq, short, true false, very short. You can mix any combination, or filter to just the type you want to practice — for example, only numericals to drill calculation, or only short-answer questions for exam revision.
Is Practico aligned with CBSE exam patterns?
Yes. Practico questions are tagged by marks (1, 2, 3, 5) and by difficulty (Easy/Medium/Hard) just like CBSE exam blueprints, so you can build a worksheet that mirrors a real unit test or annual exam.