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About 100 acres of… (Class 10 Science SQP 2025-26, Q12)

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ScienceCBSE Class 10 · Sample paper, session 2025-26 · 2 marks · Very short answer

CBSE Class 10 Science sample paper 2025-26: question 12

From the official CBSE sample question paper for 2025-26, section A, question 12, for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q12 · 2 marks · Very short answerCompetency-basedOur Environment

About 100 acres of forest land was declared as Natural reserve park. The following organisms were predominant in the Natural reserve park: rabbit, frog, grass, fish, fox, water insects, zebra, peacock, snake, trees, bird, owl, insects, tiger, vulture, duck.
Create a food web comprising two separate food chains with different producers by using the above data.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2025-26.

Hints

Open one hint at a time and try again before the next.

Hint 1

First pick out the producers in the list (green plants).

Hint 2

Build one chain from each producer, then link them through an animal that appears in both.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Food chain 1 (producer: trees): Trees → Insects → Bird → Owl

    ½ mark

  2. Food chain 2 (producer: grass): Grass → Insects → Frog → Snake → Owl

    ½ mark

  3. Food web: draw the two chains with arrows pointing from food to feeder, joined at the organisms they share (insects and owl). The insects feed on both trees and grass. The insects are eaten by both the bird and the frog. The owl eats both the bird and the snake. This interlinking forms the web. Another valid example is Trees (leaves) → Zebra → Tiger and Grass → Zebra → Tiger, joined at the zebra.

    1 mark

Answer: Chain 1: Trees → Insects → Bird → Owl; Chain 2: Grass → Insects → Frog → Snake → Owl; joined at insects/owl to form a web (any correct pair with different producers is acceptable).

Where the marks are

  • Correct food chain starting with one producer, e.g. trees (½ mark)
  • Correct food chain starting with a different producer, e.g. grass (½ mark)
  • Joins the chains at a common organism with correct arrows to form a web (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Our Environment, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2025-26: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.