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. the zebra got 3,000. it used some and left 300 kJ

Answer 2

Answer:

300 KJ

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 $= \frac{10}{100} * 30,000$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 $= \frac{10}{100} * 3,000$KJ

$= 300$ KJ