Question

A grass starts with 30,000 kJ of energy. How much energy would a cheetah acquire after it ate a zebra that consumed the grass?

Answer 1

300 KJ

Step-by-step explanation:

As per the given details following food chain is formed -

Grass ---> Zebra -----> Cheetah

In a food chain, all the organism belong to a trophic level. The amount of energy passed on from one trophic level is just
`10`% of the energy at its previous trophic level.

By this concept, when zebra eats the grass, only
`10`% of energy of grass is transferred to zebra.

Thus, the energy obtained by zebra after eating grass
`= (10)/(100) * 30,000`KJ

`= 3,000` KJ

When cheetah eats zebra ,
`10`% of energy of zebra is transferred to Cheetah.

Thus, the energy obtained by Cheetah after eating zebra
`= (10)/(100) * 3,000`KJ

`= 300` KJ