Class 8 Science — Chapter 12: How Nature Works in Harmony
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise the most important Class 8 Science questions from Chapter 12, "How Nature Works in Harmony" — 72 NCERT-aligned multiple-choice questions with answers and explanations. The set is split into 24 Easy, 24 Medium and 24 Hard, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"How Nature Works in Harmony" is one of the chapters where concept clarity across physics, chemistry and biology basics really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+4 correct, −1 wrong, 0 skipped), training the same negative-marking accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on How Nature Works in Harmony, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 8 Science mastery score. A sample question is shown below; sign in free to see its answer and practise all 72.
Key concepts: How Nature Works in Harmony (Class 8 Science)
This chapter shows how living and non-living things work together in nature. The place an organism lives is its habitat, and an ecosystem is the whole set of biotic (living) and abiotic (non-living) components interacting. Green plants are producers that make food by photosynthesis; consumers (herbivores, carnivores and omnivores) eat other organisms; and decomposers such as bacteria and fungi break down dead matter and recycle nutrients. Food chains show who eats whom, food webs link many chains, and energy flows from the Sun through producers to consumers — keeping nature in a delicate balance that human overuse of resources can easily disturb.
- Habitat
- The place where an organism lives, providing it with the conditions it needs, such as a pond, a forest or a grassland.
- Ecosystem
- All the living and non-living components of an area interacting together; a pond or a forest is an ecosystem.
- Population and community
- A population is all the individuals of one species in a habitat; a community is all the different populations living together.
- Biotic components
- The living parts of an ecosystem — plants, animals and microbes.
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In an ecosystem, biotic components interact with:
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See the answer and solution to this question, then practise all 72 questions (24 Easy · 24 Medium · 24 Hard) with timed scoring and instant feedback, plus the complete key-concept notes, formulas & exam tips. Sign in with Google — no card needed.
Start this chapter free →How Nature Works in Harmony — FAQs
What are the key concepts in Class 8 Science How Nature Works in Harmony?+
This chapter shows how living and non-living things work together in nature. The place an organism lives is its habitat, and an ecosystem is the whole set of biotic (living) and abiotic (non-living) components interacting. Green plants are producers that make food by photosynthesis; consumers (herbivores, carnivores and omnivores) eat other organisms; and decomposers such as bacteria and fungi break down dead matter and recycle nutrients. Food chains show who eats whom, food webs link many chains, and energy flows from the Sun through producers to consumers — keeping nature in a delicate balance that human overuse of resources can easily disturb. Key ideas include Habitat, Ecosystem, Population and community, Biotic components.
What does Class 8 Science Chapter 12 (How Nature Works in Harmony) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "How Nature Works in Harmony" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "How Nature Works in Harmony" questions free to practise?+
Yes — sign in with Google to practise "How Nature Works in Harmony" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "How Nature Works in Harmony" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Are these "How Nature Works in Harmony" MCQs available with answers?+
Yes. This page shows one sample question so you can see the format; sign in free with Google to reveal the correct option and a step-by-step "Why" explanation for it, then practise all 72 questions with instant scoring.
Is there negative marking in the "How Nature Works in Harmony" quizzes?+
Yes — the timed quizzes use exam-grade marking: +4 for a correct answer, −1 for a wrong one and 0 for a skipped question, so you practise the same negative-marking discipline as CBSE Board exams.
Are these important questions for How Nature Works in Harmony?+
The set is curated to the NCERT syllabus and weighted toward the question patterns that actually appear in CBSE Board exams, across Easy, Medium and Hard — so it doubles as an "important questions" revision list for "How Nature Works in Harmony".