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?
30 kJ
300 kJ
3,000 kJ
30,000 kJ

Answer 1

300 kJ.

Using the 10% rule of energy transfer: zebra gets 10% of 30,000 kJ = 3,000 kJ; cheetah gets 10% of that = 300 kJ.