CTET · Study & Practice
Natural Resources (VI–VIII)
Natural resources is one of the most reliably tested clusters in the CTET Paper II Science section, and the questions are rarely hard — they reward a teacher who actually knows the Class VI–VIII NCERT facts cold. Expect the composition of air (roughly 78% nitrogen, 21% oxygen), the three stages of the water cycle, how soil forms in layered horizons, and the big distinction between renewable and exhaustible resources. Coal and petroleum show up almost every cycle as fossil fuels — non-renewable, formed over millions of years, and finite. What lifts these from rote recall to CTET-style items is the pedagogy: how do you teach 'air has mass' to a Class VII child, what misconception makes students think plants get food from soil, and how do you turn a topic like pollution into an activity rather than a lecture. This chapter pins down the science first, then the classroom angle CTET examiners actually grade.
Topics
1
Air, Water & Soil
Start →
2
Conservation & Pollution
Start →
3
Coal, Petroleum & Sources of Energy
Start →
⚡ Smart tips & memory hooks
Memory hooks and exam-smart tips to lock this chapter in and answer CTET MCQs quickly and accurately.
- Air composition, in one breath: "78 N, 21 O, 1 rest." Nitrogen wins — never say oxygen is most abundant.
- Water cycle order = E-C-P: Evaporation → Condensation → Precipitation. (Transpiration from plants feeds the same loop.)
- Soil profile top-to-bottom = Topsoil (humus) → Subsoil → Parent rock. Loamy = best for crops.
- Renewable = never finishes (Sun, wind, water, biomass). Non-renewable = fossil fuels (coal, petroleum, natural gas) = exhaustible.
- The three Rs in order of priority: Reduce first, then Reuse, then Recycle.
- Biodegradable = microbes break it down (peels, paper). Non-biodegradable = plastic, glass — the polluters.
⚠️ Common mistakes & traps
CTET loves to test these exact confusions. Internalise each trap before exam day.
- Saying oxygen is the most abundant gas in air — it is nitrogen (~78%); oxygen is ~21%.
- Reversing condensation and evaporation — evaporation is liquid→vapour (the Sun), condensation is vapour→droplets (clouds).
- Calling coal or petroleum renewable — they are fossil fuels, non-renewable and exhaustible.
- Confusing reuse with recycle — reuse keeps the item as-is; recycle processes the material into something new.
- Treating plastic and glass as biodegradable — they are non-biodegradable, which is exactly why they pollute.
- Thinking plants get their food from the soil — they make food by photosynthesis and only absorb water and minerals from soil.
📈 CTET exam insight & PYQ analysis
Natural-resource items appear in most CTET Paper II Science papers, usually 2–4 questions. The highest-frequency facts are the composition of air (nitrogen 78% / oxygen 21%), the three stages of the water cycle, the renewable-vs-non-renewable classification, and the identification of coal and petroleum as exhaustible fossil fuels. Conservation questions cluster around the three Rs and biodegradable vs non-biodegradable waste, while pollution items ask for the type or cause (air/water/soil) and link CO₂ to global warming. A growing share are pedagogy-wrapped: choosing the best activity to teach 'air has mass', addressing the misconception that fossil fuels never run out, or designing an experiment on soil percolation — so revise both the NCERT facts and the recommended inquiry/activity methods.
🎴 Flashcards — instant recall
Tap a card to reveal the answer. Drill these until they are automatic.
What is the approximate composition of air?Tap to reveal
~78% nitrogen, ~21% oxygen, ~1% other gases (CO₂, argon, water vapour)
Name the three stages of the water cycle in order.Tap to reveal
Evaporation → Condensation → Precipitation
What are the layers of a soil profile, top to bottom?Tap to reveal
Topsoil (humus-rich) → Subsoil → Parent rock
Which soil is best for most crops?Tap to reveal
Loamy soil — a balanced mix of sand, clay and humus
What are the three Rs of conservation?Tap to reveal
Reduce, Reuse, Recycle
Give two non-renewable (exhaustible) resources.Tap to reveal
Coal and petroleum (also natural gas) — fossil fuels
Give two renewable (inexhaustible) energy sources.Tap to reveal
Solar (Sun) and wind (also water/hydro, biomass)
How do fossil fuels form?Tap to reveal
From dead plants and animals buried under rock for millions of years, under heat and pressure
Biodegradable vs non-biodegradable — give an example of each.Tap to reveal
Biodegradable: vegetable peels/paper; Non-biodegradable: plastic/glass
Which gas, rising from fossil-fuel burning, causes global warming?Tap to reveal
Carbon dioxide (CO₂) — via the greenhouse effect
What is petroleum nicknamed and how is it separated?Tap to reveal
“Black gold”; separated by fractional distillation (refining)
Name one fuel-conservation tip taught in Class VIII.Tap to reveal
Switch off the engine at red lights (also: maintain tyre pressure, use public transport)
📌 Quick revision
Air is a mixture — about 78% nitrogen and 21% oxygen — with mass and pressure. Water recycles through evaporation, condensation and precipitation. Soil forms by weathering into a profile of topsoil, subsoil and parent rock, with loamy soil best for crops. Resources split into renewable/inexhaustible (Sun, wind, water, biomass) and non-renewable/exhaustible (coal, petroleum, natural gas — the fossil fuels, formed over millions of years and refined into petrol, diesel and LPG). Conservation rests on the three Rs (Reduce, Reuse, Recycle), and pollution of air, water and soil — much of it from burning fossil fuels and non-biodegradable plastic — links CO₂ to global warming. For CTET, pair these NCERT facts with the recommended activity/inquiry pedagogy and the common misconceptions you must correct.
Chapter test
📝 Natural Resources (VI–VIII) — Chapter Test
25 fresh questions · timed · full solutions
Start chapter test →
📊 My CTET analytics
Track scores, accuracy by topic and progress over time.
View analytics →
📚 Want the full concept lesson?
This chapter gives you the CTET-focused recap, pedagogy and exam-style practice. For the underlying concept taught step by step — worked from the ground up with diagrams — open the matching lesson in our school Maths course.
🔗 See the full lesson in our Class 6–8 Science course
Optional deep-dive · full Class 6–8 teaching · diagrams & worked steps
Explore the lesson →
🏆 Vidaara CTET success checklist
You have truly mastered Natural Resources (VI–VIII) when you can tick every box below.
- Recall every formula in this chapter without looking them up
- Solve each topic’s practice set with at least 80% accuracy
- Use the chapter shortcuts to cut your solving time in half
- Spot and avoid every common trap listed above
- Score 80%+ on the timed chapter test
📋 Chapter mastery scorecard
Track where you stand. Aim for the target before moving to the next chapter.
| Skill checkpoint | Target |
|---|---|
| Concept theory & formulas understood | 100% |
| Topic practice sets attempted (3 topics) | 3/3 |
| Best topic-test score | — → 80%+ |
| Chapter test score | — → 80%+ |
| Flashcards drilled to instant recall | 12 cards |
Key Concepts — Quick Reference
This chapter
Air, Water & Soil — the core facts
| Composition of air | ~78% Nitrogen · ~21% Oxygen · ~1% others (CO₂, argon, water vapour) |
|---|---|
| Water cycle | Evaporation → Condensation → Precipitation (then collection/run-off) |
| Soil profile | Topsoil (humus-rich) → Subsoil → Parent rock; formed by weathering |
| Soil types | Sandy (big particles, drains fast) · Clayey (fine, holds water) · Loamy (best for crops) |
Energy & Conservation
| Renewable (inexhaustible) | Sun, wind, water, biomass — replenished naturally |
|---|---|
| Non-renewable (exhaustible) | Coal, petroleum, natural gas — fossil fuels, finite |
| Fossil fuels | Formed from dead plants/animals buried for millions of years |
| The 3 Rs | Reduce · Reuse · Recycle — the conservation mantra |