Main Menu
  • School
    • Close
    • CBSE English Medium
    • CBSE Hindi Medium
    • UP Board
    • Bihar Board
    • Maharashtra Board
    • MP Board
    • Gujarat Board
    • Close
  • English
    • Close
    • English Grammar for School
    • Basic English Grammar
    • Basic English Speaking
    • English Vocabulary
    • English Idioms & Phrases
    • Personality Enhancement
    • Interview Skills
    • Close
  • Sarkari Exam Prep
    • Close
    • All Govt Exams Preparation
    • MCQs for Competitive Exams
    • Notes For Competitive Exams
    • NCERT Syllabus for Competitive Exam
    • Close
  • Study Abroad
    • Close
    • Study in Australia
    • Study in Canada
    • Study in UK
    • Study in Germany
    • Study in USA
    • Close
Science Class 8 || Menu
  • Videos Science Class 8
  • MCQ Science Class 8
  • Notes Science Class 8
  • Question Answer Science Class 8
  • Important Question Science Class 8
  • Previous Year Papers Science Class 8
  • Sample Papers Science Class 8
  • Book Science Class 8
  • Marking Scheme Science Class 8
  • Crop Production and Management
  • Microorganisms: Friend and Foe
  • Coal and Petroleum
  • Combustion and Flame
  • Conservation of Plants and Animals
  • Reproduction in Animals
  • Force and Pressure
  • Friction
  • Sound
  • Chemical Effects of Electric Current
  • Science Class 8

Important Questions Chapter 12 Class 8 Science Curiosity CBSE Board

Advertisement

How Nature Works in Harmony


Short Questions

1. What is a habitat?
Answer:- A habitat is a place where an organism lives and grows.

2.What are biotic components?
Answer:- Biotic components are the living things in a habitat like plants and animals.

3.What are abiotic components?
Answer:- Abiotic components are the non-living things like air, water, and soil.

4.What is a population?
Answer:- A population is a group of the same kind of organisms living in one place.

5.What is a community?
Answer:- A community is made up of different populations living in the same area.

6.Who are producers in an ecosystem?
Answer:- Producers are plants that make their own food by photosynthesis.

7.Who are consumers?
Answer:- Consumers are animals that eat plants or other animals.

8.What are decomposers?
Answer:- Decomposers break down dead plants and animals into nutrients.

9.Give one example of a food chain.
Answer:- Grass → Grasshopper → Frog → Snake → Eagle

10.What is mutualism?
Answer:- Mutualism is a relationship where both organisms benefit.

11.What is commensalism?
Answer:- In commensalism, one organism benefits and the other is not harmed.

12.What is parasitism?
Answer:- In parasitism, one organism benefits and the other is harmed.

13.Name one natural ecosystem.
Answer:- A forest is a natural ecosystem.

14.Name one human-made ecosystem.
Answer:- A farm is a human-made ecosystem.

15.Why are decomposers important?
Answer:- They recycle nutrients back into the soil.


Long Questions

1. Why do elephants enter human farms and villages?
Answer:- Elephants lose food and water in forests due to deforestation.So, they enter farms in search of food like sugarcane and bananas.

2.How do biotic and abiotic components form an ecosystem?
Answer:- Living and non-living things interact and depend on each other.This interaction forms an ecosystem that supports life.

3.Why can’t an ecosystem have only producers?
Answer:- Producers need decomposers and consumers to complete the cycle.Without them, nutrients won’t be recycled and balance will break.

4.What happens if frogs disappear from a food chain?
Answer:- Grasshoppers will increase and snakes may die from no food.This will disturb the balance of the ecosystem.

5.How do fish help in increasing flowering plants near ponds?
Answer:- Fish eat dragonfly larvae, so dragonflies reduce.This helps pollinators like bees increase, helping flowers bloom more.

6.How do food chains and food webs differ?
Answer:- A food chain shows one feeding path, while a food web shows many.Food webs link several chains, showing the full picture.

7.What are the benefits of the Sundarbans ecosystem?
Answer:- Sundarbans slow down storms and absorb carbon dioxide.They also provide oxygen and shelter for animals.

8.Why should we adopt sustainable farming?
Answer:- Using too many chemicals harms soil and nature.Eco-friendly methods keep soil healthy and protect our food.

9.What happens when plants in a pond start dying?
Answer:- Oxygen in the water reduces, and fish start dying.Insects increase and spread to farms, harming crops.

10.How can we protect ecosystems?
Answer:- By reducing pollution, saving trees, and managing resources wisely.Protected areas like national parks help conserve nature.

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Advertisement

CBSE Delhi Question Answer of Chapters in PDF

Free Sample Papers and Previous Years' Question Papers for CBSE Exams from the Official CBSE Academic Website (CBSE.nic.in) in Delhi, Rajasthan, Uttar Pradesh and Bihar

Download CBSE / NCERT Book, Notes & MCQ Online Test / Mock Test

Online Quiz with Answers for Objective Questions in Hindi and English

Advertisement

Maharashtra Board Marathi & English Medium

Just Launched! Access Maharashtra Board Exam MCQs, Previous Year Papers, Textbooks, Solutions, Notes, Important Questions, and Summaries—available in both Marathi and English mediums—all in one place Maharashtra Board

Android APP

सरकारी Exam Preparation

Sarkari Exam Preparation Youtube

CBSE – दिल्ली, उत्तर प्रदेश, मध्य प्रदेश, बिहार, राजस्थान & हरियाणा Board हिंदी माध्यम

कक्षा 6 to 8 हिंदी माध्यम
कक्षा 9 & 10 हिंदी माध्यम
कक्षा 11 हिंदी माध्यम

State Board

यूपी बोर्ड 6,7 & 8
बिहार बोर्ड हिंदी माध्यम

CBSE Board

Mathematics Class 6
Science Class 6
Social Science Class 6
हिन्दी Class 6
सामाजिक विज्ञान कक्षा 6
विज्ञान कक्षा 6

Mathematics Class 7
Science Class 7
SST Class 7
सामाजिक विज्ञान कक्षा 7
हिन्दी Class 7

Mathematics Class 8
Science Class 8
Social Science Class 8
हिन्दी Class 8

Mathematics Class 9
Science Class 9
English Class 9

Mathematics Class 10
SST Class 10
English Class 10

Mathematics Class XI
Chemistry Class XI
Accountancy Class 11

Accountancy Class 12
Mathematics Class 12

Learn English
English Through हिन्दी
Job Interview Skills
English Grammar
हिंदी व्याकरण - Vyakaran
Microsoft Word
Microsoft PowerPoint
Adobe PhotoShop
Adobe Illustrator
Learn German
Learn French
IIT JEE

CBSE Board English Medium

  • Class 6 CBSE Board
  • Class 7 CBSE Board
  • Class 8 CBSE Board
  • Class 9 CBSE Board
  • Class 10 CBSE Board
  • Class 11 CBSE Board
  • Class 12 CBSE Board
  • CBSE Board Hindi Medium

  • Class 6 CBSE Board
  • Class 7 CBSE Board
  • Class 8 CBSE Board
  • Class 9 CBSE Board
  • Class 10 CBSE Board
  • Class 11 CBSE Board
  • Class 12 CBSE Board
  • बिहार बोर्ड
  • Class 6 Bihar Board
  • Class 7 Bihar Board
  • Class 8 Bihar Board
  • Class 9 Bihar Board
  • Class 10 Bihar Board
  • Class 11 Bihar Board
  • Class 12 Bihar Board
  • उत्तर प्रदेश बोर्ड
  • Class 6 UP Board
  • Class 7 UP Board
  • Class 8 UP Board
  • Class 9 UP Board
  • Class 10 UP Board
  • Class 11 UP Board
  • Class 12 UP Board
  • महाराष्ट्र बोर्ड
  • Class 6 Maharashtra Board
  • Class 7 Maharashtra Board
  • Class 8 Maharashtra Board
  • Class 9 Maharashtra Board
  • Class 10 Maharashtra Board
  • Class 11 Maharashtra Board
  • Class 12 Maharashtra Board
  • मध्य प्रदेश बोर्ड
  • Class 6 MP Board
  • Class 7 MP Board
  • Class 8 MP Board
  • Class 9 MP Board
  • Class 10 MP Board
  • Class 11 MP Board
  • Class 12 MP Board

ગુજરાત બોર્ડ

  • Class 6 Gujarat Board
  • Class 7 Gujarat Board
  • Class 8 Gujarat Board
  • Class 9 Gujarat Board
  • Class 10 Gujarat Board
  • Class 11 Gujarat Board
  • Class 12 Gujarat Board

PSC Exam Preparation

  • Uttar Pradesh PSC Exam Preparation (UPPSC)
  • Bihar PSC Exam Preparation (BPSC)
  • Madhya Pradesh PSC Exam Preparation (MPPSC)
  • Rajasthan PSC Exam Preparation (RPSC)
  • Maharashtra PSC Exam Preparation (MPSC)
Privacy Policies, Terms and Conditions, About Us, Contact Us
Copyright © 2025 eVidyarthi and its licensors. All Rights Reserved.