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Energy at a trophic level from the 10% law (grass to snake chain)

The same question, asked 3 times: 2022*, 2023*, 2025. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2022

    7 (a)
    In the following food chain, only 2J of energy was available to the peacocks. How much energy would have been present in Grass ? Justify your answer. GRASS →\rightarrow GRASS HOPPER →\rightarrow FROG →\rightarrow SNAKE →\rightarrow PEACOCK

  2. Question 2

    2023

    26
    In the following food chain, if 50 J of energy was available to the hawk, how much energy would have been present at the first and third tropic levels ? Justify your answer. Grass ⟶\longrightarrow Grasshopper ⟶\longrightarrow Frog ⟶\longrightarrow Snake ⟶\longrightarrow Hawk

  3. Question 3

    2025

    15
    Consider the following food chain : Grass →\rightarrow Grasshopper →\rightarrow Frog →\rightarrow Snake →\rightarrow Eagle If the amount of energy available at third trophic level is 50 kJ, the available energy at the producer level was :

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