Consider the following food chain which occurs in a forest: Grass → Deer → Lion. If 10000 J of solar energy is available to the grass, how much energy would be available to the deer to transfer it to the lion?

Hint

First apply the $1\%$ rule for solar energy captured by plants, then apply the $10\%$ law for energy transfer from plants to the herbivore.

Quick oral answer

The grass captures $1\%$ of $10000\text{ J}$, which is $100\text{ J}$. The deer gets $10\%$ of that, which is $10\text{ J}$. So, $10\text{ J}$ is available in the deer to be transferred to the lion.