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Nature’s Treasures

🎓 Class 6 Science CBSE Theory Ch 11 — Nature’s Treasures ⏱ ~8 min
🌐 Language: [gtranslate]

This MCQ module is based on: Nature’s Treasures

[myaischool_lt_science_assessment grade_level="class_6" science_domain="earth_science" difficulty="basic"]

Chapter 11 — Summary of Big Ideas

This chapter opened the treasure-chest of our planet. We discovered what natural resources are, how to tell renewable from non-renewable, and why every single one — from the air we breathe to the soil under our feet — deserves our care. Let us take one last look at the ideas.

Natural Resources

Things from nature that support life — air, water, soil, minerals, forests, fossil fuels.

Renewable vs Non-Renewable

Renewable (sun, wind, water, forests) refill fast. Non-renewable (coal, oil, gas, metals) take millions of years.

Air

A mixture: 78% nitrogen, 21% oxygen, 0.04% CO₂ and others. Needed for breathing, burning, and plant food.

Water

71% of Earth, but only <1% easy to use. Comes from rain, rivers, lakes, wells, glaciers, oceans.

Soil

Top layer of earth made of rock bits + humus. Types: sandy, clayey, loamy, black, red, alluvial.

Rocks

Three families: Igneous (from lava), Sedimentary (from layers), Metamorphic (changed by heat).

Minerals

Pure substances inside rocks — iron, copper, gold, bauxite, mica, limestone — mostly non-renewable.

Forests

Give oxygen, rain, wildlife homes, medicines, wood. Deforestation causes floods, drought, global warming.

Fossil Fuels

Coal, petroleum, natural gas — buried "sunshine" formed over millions of years. All non-renewable.

Renewable Energy

Solar, wind, hydro, bio-energy — clean, endless and future-friendly.

Conservation

Use less, save water, plant trees, fix leaks, avoid waste.

Three R's

Reduce, Reuse, Recycle — the simple rule of sustainable living.

Key Terms to Remember

Natural ResourceA gift from nature useful to living beings.
RenewableRefilled quickly by nature — sun, wind, water.
Non-RenewableTakes crores of years to form — coal, oil.
AtmosphereThe blanket of air around Earth.
WeatheringSlow breaking of rocks into soil.
HumusDark, rotted plant matter in soil.
Igneous RockFormed from cooled magma or lava.
Sedimentary RockMade of settled layers of sediments.
Metamorphic RockChanged by heat and pressure.
MineralNatural pure solid — ingredient of rocks.
MiningTaking minerals out of the earth.
DeforestationCutting down of forests in large numbers.
AfforestationPlanting new trees to grow forests.
Fossil FuelCoal, petroleum, natural gas — from buried life.
CoalSolid fossil fuel from ancient plants.
PetroleumLiquid fossil fuel from tiny sea creatures.
Natural GasGaseous fossil fuel (mostly methane).
Solar EnergyEnergy from sunlight — renewable.
Wind EnergyElectricity from moving air.
Rainwater HarvestingCollecting rainwater for later use.
Three R'sReduce, Reuse, Recycle.
Chipko AndolanTree-hugging movement to save forests.

NCERT-Style Exercises

Try each question first on your own. Then click Show Solution to check.

Q1.Fill in the blanks:
(a) Air is a _______ of gases.
(b) _______ is the most abundant gas in air.
(c) _______ rocks are formed when magma cools.
(d) The process of taking minerals from the earth is called _______.
L1 Remember
(a) mixture   (b) Nitrogen (~78%)   (c) Igneous   (d) mining
Q2.State whether the following are True or False:
(a) Petroleum is a renewable resource.
(b) Marble is a metamorphic rock.
(c) Cutting forests increases the oxygen in the air.
(d) Sandy soil holds water longer than clayey soil.
L2 Understand
(a) False — petroleum is non-renewable. (b) True — formed from limestone by heat and pressure. (c) False — cutting trees reduces oxygen and increases CO₂. (d) False — clayey soil holds water longer; sandy soil drains fast.
Q3.Give one difference between renewable and non-renewable resources, with one example each. L2 Understand
Renewable resources are refilled quickly by nature, so they do not run out if used with care (example: sunlight, wind, water). Non-renewable resources take millions of years to form, so once used up they cannot be replaced in our lifetime (example: coal, petroleum, iron ore).
Q4.Name the three types of rocks and give one example of each. L1 Remember
(i) Igneous — e.g. Granite, Basalt. (ii) Sedimentary — e.g. Sandstone, Limestone. (iii) Metamorphic — e.g. Marble, Slate.
Q5.Explain how soil is formed. L2 Understand
Soil is formed by the slow breaking of rocks into tiny pieces — a process called weathering. Sun, wind, water and cold make rocks crack and crumble. Rivers and winds grind the bits smaller. Dead leaves, insects and worms rot and add humus. Over hundreds of years, this mixture of rock bits, humus, water, air and living things becomes fertile soil.
Q6.What is deforestation? List any three ill effects on the environment. L3 Apply
Deforestation is the cutting of forests in large numbers, faster than new trees can grow. Ill effects: (i) Soil erosion and floods, because roots no longer hold the soil. (ii) Less rainfall and more droughts. (iii) Loss of animal homes — many species become endangered. (iv) Global warming — more CO₂ stays in the air.
Q7.How is coal formed? Why is it called a fossil fuel? L2 Understand
About 300 million years ago, huge forests existed on Earth. Earthquakes and floods buried these trees under layers of mud and water. Over millions of years, great heat and pressure slowly changed the buried plants into a hard black substance — coal. Because coal is made from the buried (fossil) remains of long-dead plants, it is called a fossil fuel.
Q8.Match the following:
(a) Bauxite    (i) Cement
(b) Iron ore    (ii) Electric wires
(c) Copper    (iii) Aluminium
(d) Limestone    (iv) Steel
L2 Understand
(a) – (iii) Aluminium   |   (b) – (iv) Steel   |   (c) – (ii) Electric wires   |   (d) – (i) Cement
Q9.Why should we save water even though 71% of Earth's surface is covered by water? L4 Analyse
Most of Earth's water (about 97.5%) is salty ocean water, which we cannot drink or use directly for farming. Of the 2.5% freshwater, most is locked in glaciers and deep underground. Less than 1% is easy to reach for daily use. With a growing population and polluted rivers, even this small share is shrinking. That is why every drop saved matters — water shortage is already a serious problem in many Indian cities.
Q10.Explain the Three R's of sustainable living with one example each. L3 Apply
(i) Reduce — use less in the first place. Example: switch off fans/lights when leaving a room. (ii) Reuse — use the same thing again. Example: refill an old water bottle instead of buying new ones. (iii) Recycle — turn waste into new things. Example: old newspapers are pulped and made into new notebooks.
Q11.Compare solar energy and petroleum as sources of energy. Which one should we use more, and why? L5 Evaluate
Solar energy comes from the Sun, is renewable, unlimited, and clean — it does not release smoke or CO₂. Petroleum is a non-renewable fossil fuel that took millions of years to form and releases harmful gases when burnt. We should use solar energy more, because it will not run out and it does not pollute the air. India's Bhadla Solar Park (Rajasthan) shows how big solar can be.
Q12.Imagine you are the head of your village Panchayat. Design a simple action plan with five steps to protect the natural resources of your village. L6 Create
Sample plan (answers may vary):
1. Plant 500 trees every monsoon along roads and the common land (Van Mahotsav).
2. Build rainwater-harvesting pits at every 3 houses and one big pond for cattle.
3. Start a "fix-the-tap" drive — repair every leaking hand-pump within a week.
4. Promote biogas plants using cow-dung so that less firewood is burnt.
5. Conduct a monthly clean-up of the village pond and teach children to segregate wet and dry waste for recycling.
Final Thought: Earth has been generous to us for thousands of years. Now it's our turn to give back. Every drop saved, every tree planted, every switch turned off — these are our small "thank-yous" to nature.

Frequently Asked Questions — Nature's Treasures — Chapter 11 Exercises

What does the topic 'Nature's Treasures — Chapter 11 Exercises' cover in Class 6 Science?

The topic 'Nature's Treasures — Chapter 11 Exercises' is part of NCERT Class 6 Science Chapter 11 — Nature's Treasures. It covers the key ideas of natural resources, soil, forests, fossil fuels, conservation, NCERT exercises, explained through everyday examples, labelled diagrams and hands-on activities from the NCERT Curiosity textbook. Class 6 students learn simple definitions, see why each idea matters in daily life, and try short experiments and observations. The lesson uses easy language, colourful pictures and small questions so that young learners build a strong base for higher classes and for competency-based questions in CBSE school tests.

Why is 'Nature's Treasures — Chapter 11 Exercises' important for Class 6 NCERT Science?

'Nature's Treasures — Chapter 11 Exercises' is important because it builds the first ideas of science that Class 6 students will use again in Class 7, 8 and beyond. NCERT Chapter 11 — Nature's Treasures — introduces natural resources and connects it to things children already see at home, at school and in nature. Learning this topic helps students ask better questions, understand simple news about science, and score well in CBSE tests that use competency-based questions. The chapter also supports NEP 2020 by encouraging curiosity, observation and learning by doing rather than only reading and memorising.

What are the key ideas students should remember from Nature's Treasures — Chapter 11 Exercises?

The key ideas in 'Nature's Treasures — Chapter 11 Exercises' for Class 6 Science are: natural resources, soil, forests, fossil fuels, conservation, NCERT exercises. Students should be able to say each term in their own words, give one or two easy examples from daily life, and draw a small labelled diagram where needed. A good way to revise is to make flashcards, write a short note in the science notebook, and solve the NCERT in-text and exercise questions of Chapter 11. Linking every idea to something seen at home or school — in the kitchen, garden, playground or sky — makes these ideas easy to remember for unit tests and the annual CBSE examination.

How is Nature's Treasures — Chapter 11 Exercises taught using activities in NCERT Curiosity Class 6?

NCERT Curiosity Class 6 Science teaches 'Nature's Treasures — Chapter 11 Exercises' through an inquiry-based approach using Predict–Observe–Explain activities. Students first make a guess, then try a small experiment with safe, easily available materials, and finally explain what happened and why. This matches the NEP 2020 focus on learning by doing. For Chapter 11 — Nature's Treasures — the textbook has hands-on tasks, labelled pictures and thinking questions built for Bloom's Taxonomy Levels 1 to 6. Teachers use these activities, along with competency-based questions (CBQs) and assertion–reason items, to check real understanding instead of only rote learning.

How should Class 6 students prepare for the Chapter 11 exercises?

To prepare for the Chapter 11 — Nature's Treasures — exercises in NCERT Class 6 Science, students should first revise the theory in Parts 1–3 and make a short note of definitions and diagrams for natural resources, soil, forests, fossil fuels, conservation, NCERT exercises. Next, try each exercise question on their own before looking at the solution. Pay special attention to MCQs, match-the-following, fill-in-the-blanks, assertion–reason and short-answer items, as these often appear in CBSE competency-based tests. Practising with the NCERT Curiosity textbook, the exemplar questions, and the MyAiSchool practice bank helps Class 6 students score better in unit tests and the annual examination.

How does 'Nature's Treasures — Chapter 11 Exercises' connect to other chapters of Class 6 Science?

'Nature's Treasures — Chapter 11 Exercises' connects to many other chapters in NCERT Class 6 Science Curiosity. The ideas of natural resources come back when students study related topics like diversity in the living world, food, magnets, measurement, materials, temperature, water, separation, habitats, natural resources and the solar system. For example, what students learn here helps them build mental pictures for later chapters and for Class 7 and Class 8 Science. Teachers often ask cross-chapter questions in CBSE exams to check if students can use what they learned in Chapter 11 — Nature's Treasures — in new situations. This linked approach matches the NEP 2020 and NCF 2023 focus on holistic, competency-based learning.

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