Q15
1 markMCQSection A

Consider the following food chain: Grass -> Grasshopper -> Frog -> Snake -> Eagle. If the amount of energy available at third trophic level is 50 kJ50 \text{ kJ}, the available energy at the producer level was:

Our Environment
Ecosystem

Options

(A)0.5 kJ0.5 \text{ kJ}
(B)5 kJ5 \text{ kJ}
(C)500 kJ500 \text{ kJ}
(D)5000 kJ5000 \text{ kJ}
Official Answer

The energy available at the producer level is 10 times the energy available at the third trophic level.

energy flow10% lawtrophic level

Marking Scheme

  • 11 mark

Hint

Use the 10% law to calculate the energy available at each trophic level.

Quick Oral Answer

The energy available at the producer level is 5000 kJ.

Analysis & Explanation

This question requires the student to understand the concept of energy flow in an ecosystem and apply the 10% law to calculate the energy available at the producer level.

Common Mistakes

  1. 1not applying the 10% law
  2. 2not calculating the energy available at each trophic level

Interesting Facts

The 10% law is a general rule of thumb and can vary depending on the specific ecosystem.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2025?

This question carries 1 mark in the CBSE Class 10 Science 2025 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Our Environment" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Ecosystem" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2025 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.