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CBSE · Class 8 · Social Science

Natural Resources and Their Use

Standard difficulty · 20 questions · 40 marks

Name: Date: Score: ____ / 40

Write full answers in Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
Something in nature counts as a resource when it is technologically accessible, economically feasible and:
  1. owned by the government
  2. made in a factory
  3. found only underground
  4. culturally acceptable
2.
Which of these is a renewable resource?
  1. gold
  2. natural gas
  3. forest timber (used sustainably)
  4. copper
3.
On the textbook’s map, Keonjhar is marked for which mineral?
  1. manganese
  2. oil
  3. coal
  4. iron ore
4.
What does “m bgl” mean?
  1. metres below ground level
  2. a benefit people get from nature’s working
  3. the ancient Indian science of caring for plants
  4. nature creating new life and conditions to thrive
5.
A person needs about 350 litres of oxygen a day. How much do 7 people need in 7 days?
  1. 13,475 litres
  2. 17,150 litres
  3. 17,500 litres
  4. 2,450 litres
6.
A mature tree gives about 275 litres of oxygen a day. How much do 12 such trees give?
  1. 287 litres
  2. 4,200 litres
  3. 3,575 litres
  4. 3,300 litres
7.
A school uses 1,200 units of electricity a month. Solar panels supply 40% of it. How many units come from the sun?
  1. 480 units
  2. 530 units
  3. 4,800 units
  4. 720 units
8.
Sikkim became fully organic in 2016. How many years is that before 2026?
  1. 10 years
  2. 14 years
  3. 11 years
  4. 20 years
Section B — Short answer8 × 2 = 16 marks
9.
Name three ways natural resources can be grouped by use.
10.
Renewable or non-renewable? (a) iron ore (b) wind
11.
Which mineral is each place on the book’s map known for? (a) Ankleshwar (b) Keonjhar
12.
Explain each term: (a) m bgl (b) mulching
13.
A group of 5 people needs about 1,750 litres of oxygen a day. A mature tree gives about 275 litres. How many whole trees are needed to give at least that much?
14.
Organic farmers in Sikkim earned about 20% more on average. If a farmer earned ₹148,000 a year before, about how much would they earn after a 20% rise?
15.
About 80% of Punjab’s area is classed as over-exploited for groundwater. In a district of 1,900 square km, about how much would that be?
16.
A house switches to solar power and stops buying 1,900 units of electricity a year at ₹9 a unit. How much does it save in a year, and in 5 years?
Section C — Longer answers4 × 4 = 16 marks
17.
Explain how using a renewable resource too fast can deplete it. Give two examples.
18.
Match each with its mineral: (a) Kudremukh (b) Digboi (c) Jharia. Choose from: coal; iron ore; oil.
19.
(a) How much oxygen does a class of 50 students need a day, at about 350 litres each? (b) How many mature trees, at about 275 litres each, give at least that much? (c) Give two other ways trees help us.
20.
Petroleum and coal are non-renewable. Explain what that means and suggest two ways to reduce our use of such resources.
AmbifulWorksheets
Practice that never repeats
CBSE · Class 8 · Social Science

Answer key

Natural Resources and Their Use · AW-8SS-NRU-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) culturally acceptable—
2(c) forest timber (used sustainably)—
3(d) iron ore—
4(a) metres below ground level—
5(b) 17,150 litres350 × 7 × 7
6(d) 3,300 litres275 × 12
7(a) 480 units40% of 1,200
8(a) 10 years2026 − 2016
9Essential for life (air, water, food), for materials (wood, marble), and for energy (coal, sunlight, wind).—
10(a) non-renewable (b) renewable—
11(a) oil (b) iron ore—
12(a) metres below ground level (b) covering soil with straw or leaves—
137 trees1,750 ÷ 275, rounded up
14₹177,60020% of 148,000 = 29,600
15about 1,520 square km80% of 1900
16₹17,100 a year; ₹85,500 in 5 years1900 × 9; × 5
17If timber is cut faster than forests grow, or fish are caught in spawning season, the resource cannot regenerate and runs out.—
18(a) iron ore (b) oil (c) coal—
19(a) 17,500 litres (b) 64 trees (c) They hold soil, filter water, give shade and homes for animals.350 × 50; ÷ 275 rounded up
20They form over very long periods and cannot be replaced as fast as we use them; use renewable energy, save electricity, recycle metals and use public transport.—