eVidyarthi
Menu
  • School
    • Close
    • CBSE English Medium
    • CBSE Hindi Medium
    • UP Board
    • Bihar Board
    • Maharashtra Board
    • MP Board
    • Close
  • Sarkari Exam Preparation
    • Close
    • Notes For Competitive Exams
    • MCQs for Competitive Exams
    • All Govt Exams Preparation
    • 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 6 Maharashtra Board | Menu
  • MCQ Science Class 6 Maharashtra Board
  • Book Science Class 6 Maharashtra Board
  • Question Answers Science Class 6 Maharashtra Board
  • Notes Science Class 6 Maharashtra Board
  • Important Questions Science Class 6 Maharashtra Board
  • Science Class 6

General Science Question Answers Chapter 1 Class 6 Maharashtra Board

Question Answers For All Chapters – General Science Class 6

Natural Resources – Air, Water and Land


Exercise


1. Fill in the blanks:
(a) The layer of ozone gas absorbs ultraviolet rays that come from the sun to the earth.
(b) Of the total water available on the earth, fresh water forms 2.7 percent.
(c) Both biotic and abiotic constituents are present in the soil.


2. Why is it said that – ?
(a) The ozone layer is a protective shell of the earth.
Answer – The ozone layer absorbs harmful ultraviolet rays from the sun, which can be dangerous to living beings. This protects all life on Earth.
(b) Water is life.
Answer – All living things need water to survive. It is necessary for drinking, farming, cooking, and cleaning. Without water, life cannot exist.
(c) Seawater is useful even though it is not potable.
Answer – Seawater is used for fishing, transportation, and producing salt. It also helps in maintaining the water cycle by forming clouds through evaporation.


3. What will happen if – ?
(a) Microbes in the soil get destroyed.
Answer – The soil will lose its fertility as microbes help decompose dead plants and animals, making the soil rich in nutrients.
(b) The number of vehicles and factories in your surroundings increases.
Answer – Air pollution will increase, leading to health problems like breathing difficulties and global warming.
(c) The total supply of potable water is finished.
Answer – People and animals will struggle to survive, agriculture will fail, and life on Earth will be in danger.


4. Match the following:
1. Carbon dioxide → (c) Plants and food production
2. Oxygen → (d) Combustion
3. Water vapour → (b) Rain
4. Microbes → (a) Generation of soil


5. Name the following:
(a) Constituents of the biosphere → Air, water, land, and living organisms.
(b) Biotic constituents of soil → Microbes, insects, worms, rodents.
(c) Fossil fuel → Coal, petroleum, natural gas.
(d) Inert gases in air → Argon, Neon, Krypton, Xenon, Helium.
(e) Gases that are harmful to the ozone layer → Chlorofluorocarbons (CFCs), Carbon tetrachloride.


6. True or false?
(a) Land and soil are the same thing. → False
(b) The water in a lake is called groundwater. → False
(c) It takes about 1000 years to form a 25 cm thick layer of soil. → False (It takes 1000 years to form a 2.5 cm layer of soil.)
(d) Radon is used in decorative lights. → False (Neon is used in decorative lights.)


7. Answer in your own words:
(a) Explain with the help of a diagram how soil is formed.
Answer – Soil is formed by the breaking down of rocks due to wind, water, and temperature changes. The process is slow and takes thousands of years. Microbes and dead plant material also contribute to soil formation.

(b) Why is there a shortage of water even though it occupies about 71% of the earth’s surface?
Answer – Most of the Earth’s water (97%) is salty and found in oceans. Only a small amount (2.7%) is fresh water, and an even smaller portion is available for human use, as much of it is frozen in glaciers or deep underground.

(c) What are the various constituents of air? Write their uses.
Answer – Nitrogen (78%) → Helps in plant growth and protein formation.
Oxygen (21%) → Essential for breathing and burning.
Carbon dioxide (0.03%) → Used by plants for photosynthesis.
Argon (0.9%) → Used in electric bulbs.
Neon, Krypton, Xenon → Used in lights and photography.

(d) Why are air, water, and land considered valuable natural resources?
Answer – These resources are necessary for the survival of all living beings. Air provides oxygen, water is needed for drinking and farming, and land supports human settlements and agriculture. They must be used wisely to ensure sustainability.

Leave a Reply Cancel reply

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

Ads

HSC Maharashtra – Marathi Medium – Maharashtra Board

📘 Maharashtra Board Exam Resources (Marathi Medium)

  • Maharashtra Board Question Banks (Marathi)
  • Maharashtra Board Sample Papers in Marathi Medium
  • Previous Year Question Papers – Marathi Medium
  • Marathi Notes and Practice Mock Tests for SSC/HSC
  • Includes MCQs (Multiple Choice Questions) in Marathi
  • All resources are available in Marathi Medium

📗 Maharashtra Board Textbooks & PDFs (Marathi Medium)

  • 10th Standard Textbook PDF in Marathi
  • Class-wise Textbook PDF (Marathi Medium)
  • Marathi Digest in PDF
  • SSC/HSC Class Books in Marathi PDF
  • Downloadable PDFs - Marathi Education Board

📒 Marathi Study Material for Maharashtra Board

  • Notes in Marathi
  • Chapter-wise Question & Answer (Solutions) in Marathi
  • Important Questions for SSC – Marathi Medium
  • Summary Important Formulas
  • MCQ's, Question Bank, Sample Papers, Previous Year Paper for cxlass 6th to 12th Std for Maharstra Board

क्लास की बुक (पुस्तक), MCQ, नोट्स इन हिंदी

Download एनसीईआरटी सलूशन, सैंपल पेपर, प्रश्न पत्र इन पीडीएफ

CBSE, 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

Study Abroad

Study in Australia: Australia is known for its vibrant student life and world-class education in fields like engineering, business, health sciences, and arts. Major student hubs include Sydney, Melbourne, and Brisbane. Top universities: University of Sydney, University of Melbourne, ANU, UNSW.

Study in Canada: Canada offers affordable education, a multicultural environment, and work opportunities for international students. Top universities: University of Toronto, UBC, McGill, University of Alberta.

Study in the UK: The UK boasts prestigious universities and a wide range of courses. Students benefit from rich cultural experiences and a strong alumni network. Top universities: Oxford, Cambridge, Imperial College, LSE.

Study in Germany: Germany offers high-quality education, especially in engineering and technology, with many low-cost or tuition-free programs. Top universities: LMU Munich, TUM, University of Heidelberg.

Study in the USA: The USA has a diverse educational system with many research opportunities and career advancement options. Top universities: Harvard, MIT, Stanford, UC Berkeley

Privacy Policies, Terms and Conditions, Contact Us
eVidyarthi and its licensors. All Rights Reserved.