Nature S Treasures — Class 6 Science NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 6 Science chapter "Nature S Treasures" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 6 Science chapter "Nature S Treasures" — 8 important questions with detailed answers for CBSE board exam p…
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NCERT Solutions for Class 6 Science — Nature S Treasures. Step-by-step answers to all 8 textbook questions from this chapter, written for CBSE board preparation and free to use.
Nature S Treasures — All 8 Questions Solved
Q1. What are natural resources? Give five examples.
Natural resources are materials found in nature that are useful to humans and can be used to produce goods. Examples:
- Air: breathing, combustion
- Water: drinking, agriculture, industry
- Soil: growing crops, plants
- Minerals: metals for tools and industries
- Fossil fuels: coal, oil, natural gas for energy
- Forests: wood, medicines, food
Q2. Why is air important? Explain its composition and uses.
Air is a mixture of gases:
- Nitrogen: 78%
- Oxygen: 21%
- Argon and other gases: 1%
Importance of air:
- Oxygen is needed for respiration in animals
- Carbon dioxide is used by plants for photosynthesis
- Air is needed for combustion
- Air helps in pollination and seed dispersal
Q3. Describe the properties and importance of soil.
Soil properties:
- Mixture of rock particles, minerals, and organic matter
- Contains organisms like earthworms, bacteria, fungi
- Has pores that hold water and air
Importance:
- Medium for plant growth
- Stores water for plants
- Home for soil organisms
- Filters water
- Stores nutrients needed for plants
Q4. What are minerals? How are they classified?
Minerals are naturally occurring solid substances with definite chemical composition and crystalline structure. They are classified as:
- Metallic minerals: contain metals (iron, copper, gold, aluminium)
- Non-metallic minerals: do not contain metals (limestone, salt, gypsum, asbestos)
- Precious gems: valuable minerals used in jewellery (diamond, emerald, ruby)
Q5. Explain the importance of water in nature.
Importance of water:
- Essential for all life (animals and plants need water)
- Used for drinking, cooking, cleaning
- Used in agriculture for crops
- Used in industries for manufacturing
- Helps in nutrient transport in plants and animals
- Regulates temperature in environment
- Home for aquatic organisms
Q6. What are fossil fuels? Name the three main types and explain their uses.
Fossil fuels are formed from dead plant and animal remains buried for millions of years. The three main types are:
- Coal: used for electricity generation, heating, and in industries
- Petroleum (Oil): used to produce petrol, diesel, and many chemicals
- Natural Gas: used for heating, cooking, and electricity
They are non-renewable resources and burning them causes pollution.
Q7. Why is forest conservation important? What are the consequences of deforestation?
Forest conservation is important because forests provide:
- Oxygen and absorb carbon dioxide
- Habitat for wildlife
- Medicines and food
- Prevent soil erosion
Consequences of deforestation:
- Loss of biodiversity
- Soil erosion and degradation
- Climate change due to less carbon dioxide absorption
- Floods and landslides
- Displacement of forest communities
Q8. How can we conserve natural resources?
Methods to conserve natural resources:
- Use renewable sources like solar and wind energy
- Practice water conservation (fixing leaks, reducing usage)
- Reduce, reuse, and recycle materials
- Plant more trees and protect forests
- Use sustainable agriculture methods
- Reduce air and water pollution
- Educate people about conservation
- Create protected areas for wildlife
Nature S Treasures — Practice MCQs with Answers
Attempt these 20 multiple-choice questions after working through the solutions above. Each carries the correct option and the reasoning behind it, so a wrong answer tells you which idea to revisit.
MCQ 1. Which part of a plant primarily produces food through photosynthesis?
- A. Root
- B. Stem
- C. Leaf
- D. Flower
Answer: C. Leaf — Leaves contain chlorophyll which traps sunlight, water, and carbon dioxide to make food for the plant through a process called photosynthesis.
MCQ 2. In which natural habitat would you most likely find a fish?
- A. Desert
- B. Forest
- C. Ocean
- D. Mountain
Answer: C. Ocean — Fish are aquatic animals, meaning they live in water. Oceans, rivers, and lakes are their natural habitats.
MCQ 3. From where does the water in clouds come before it falls as rain?
- A. Underground water
- B. Rivers and lakes
- C. Oceans and other water bodies
- D. Polar ice caps
Answer: C. Oceans and other water bodies — Water from oceans, rivers, and lakes evaporates due to the sun's heat, forming water vapour that rises, cools, and condenses into clouds.
MCQ 4. Which gas, abundant in the air, is essential for all living beings to breathe?
- A. Nitrogen
- B. Carbon dioxide
- C. Oxygen
- D. Argon
Answer: C. Oxygen — Oxygen is a vital component of the air we breathe and is necessary for respiration in humans and most other animals.
MCQ 5. Which of these is a major product we get from forests that is used to make furniture and paper?
- A. Fruits
- B. Honey
- C. Wood
- D. Spices
Answer: C. Wood — Forests are a primary source of wood, which is extensively used for construction, furniture making, and producing paper.
MCQ 6. Which of these human activities is a major cause of air pollution in cities?
- A. Planting trees
- B. Using public transport
- C. Burning fossil fuels in vehicles and factories
- D. Recycling waste
Answer: C. Burning fossil fuels in vehicles and factories — Burning fossil fuels in vehicles, industries, and power plants releases harmful gases and particles into the atmosphere, leading to air pollution.
MCQ 7. An animal that eats only plants is called a/an:
- A. Carnivore
- B. Omnivore
- C. Herbivore
- D. Scavenger
Answer: C. Herbivore — Herbivores are animals that primarily consume plant material, such as grass, leaves, and fruits, for their sustenance.
MCQ 8. Why is soil considered an important natural treasure?
- A. It makes clothes.
- B. It provides a home for fish.
- C. It supports plant growth.
- D. It makes electricity.
Answer: C. It supports plant growth. — Soil is crucial for plant growth as it provides nutrients, water, and anchorage for roots, forming the base of many food chains.
MCQ 9. Which natural mineral is commonly used in our kitchens to add flavour to food?
- A. Coal
- B. Iron
- C. Salt
- D. Gold
Answer: C. Salt — Salt (sodium chloride) is a naturally occurring mineral obtained from seawater or salt mines and is a common ingredient in cooking.
MCQ 10. The forests found in areas like the Western Ghats (India) are known for their dense growth and a wide variety of plant and animal species. What type of forests are these typically?
- A. Desert forests
- B. Evergreen forests
- C. Thorn forests
- D. Deciduous forests
Answer: B. Evergreen forests — Evergreen forests, like those in the Western Ghats, are characterized by trees that remain green throughout the year and support high biodiversity due to abundant rainfall.
MCQ 11. What is an effective way to conserve water at home?
- A. Leaving taps running
- B. Taking long showers
- C. Repairing leaky taps
- D. Watering plants in midday sun
Answer: C. Repairing leaky taps — Repairing leaky taps prevents wastage of water and is an important step towards water conservation in households.
MCQ 12. Why is it important to protect the diverse variety of plants and animals (biodiversity) on Earth?
- A. Only for tourist attraction
- B. To maintain ecological balance and provide resources
- C. To make zoos more interesting
- D. To prevent all diseases
Answer: B. To maintain ecological balance and provide resources — Biodiversity ensures a healthy ecosystem, provides essential resources like food and medicine, and contributes to the overall stability of the environment.
MCQ 13. What is the ultimate source of energy for almost all life on Earth?
- A. Geothermal energy
- B. Wind
- C. Sunlight
- D. Tides
Answer: C. Sunlight — Sunlight is the ultimate source of energy for most life on Earth, as plants use it for photosynthesis, forming the base of nearly all food chains.
MCQ 14. What is a major negative consequence of cutting down large numbers of trees (deforestation)?
- A. Increase in rainfall
- B. More oxygen in the air
- C. Soil erosion
- D. Growth of new forests
Answer: C. Soil erosion — When trees are cut down, their roots no longer hold the soil together, making it vulnerable to erosion by wind and water, leading to loss of fertile topsoil.
MCQ 15. Which of these can cause indoor air pollution, especially in rural Indian homes where traditional cooking methods are used?
- A. Electric fan
- B. Solar panel
- C. Burning firewood or cow dung cakes
- D. Air conditioner
Answer: C. Burning firewood or cow dung cakes — Burning firewood, cow dung cakes, or other biomass fuels for cooking indoors without proper ventilation releases smoke and harmful pollutants, causing indoor air pollution.
MCQ 16. Which component of nature is essential for all living beings to breathe and survive?
- A. Water
- B. Soil
- C. Air
- D. Sunlight
Answer: C. Air — Air contains oxygen, which is vital for respiration in most living organisms. Without air, life as we know it cannot exist.
MCQ 17. What is the main gas in the air that plants use to make their food through photosynthesis?
- A. Oxygen
- B. Nitrogen
- C. Carbon dioxide
- D. Hydrogen
Answer: C. Carbon dioxide — Plants absorb carbon dioxide from the air to perform photosynthesis, converting it into food and releasing oxygen.
MCQ 18. Which of the following is a major contributor to air pollution, primarily from vehicles and factories?
- A. Trees
- B. Smoke
- C. Rainwater
- D. Sunlight
Answer: B. Smoke — Smoke released from vehicles and industrial factories contains harmful gases and particles that severely pollute the air.
MCQ 19. What is the ultimate source of all fresh water on Earth?
- A. Rivers
- B. Oceans
- C. Rain
- D. Lakes
Answer: C. Rain — Rainwater is the primary source of all fresh water, replenishing rivers, lakes, and groundwater through the water cycle.
MCQ 20. Which process involves water changing into water vapour and rising into the atmosphere?
- A. Condensation
- B. Precipitation
- C. Evaporation
- D. Transpiration
Answer: C. Evaporation — Evaporation is the process where liquid water turns into gaseous water vapour due to heat, becoming part of the atmosphere.
How to Use These Solutions
Attempt each question yourself first and only then compare with the worked answer. Marks in the CBSE board exam are awarded for the METHOD as much as the final result, so reproduce the steps rather than memorising the last line. Where a solution states a law, a formula or a definition, learn that wording — examiners look for it.
Related practice for this chapter: chapter MCQs, previous-year questions, revision notes and sample papers.