EVERYDAY SCIENCE

Detailed explanation-1: -The ten percent rule states that each trophic level can only give 10% of its energy to the next level. The other 90% is used to live, grow, reproduce and is lost to the environment as heat. All energy pyramids start with energy from the Sun which is transferred to the first trophic level of producers.

Detailed explanation-2: -According to the 10%law, at each trophic level about 10% energy of the previous trophic level is passed to next level. Let x be the energy available to Deer. So deer has received 1000J of energy. Hence 10, 000 joules of energy is available to producers.

Detailed explanation-3: -As you move up the pyramid, through the trophic levels to primary, secondary and tertiary consumers, the amount of energy decreases and the levels become smaller. While energy can not be created or destroyed is it released as heat within each level. Approximately only 10% of energy is passed from one level to the next.

Detailed explanation-4: -At each step up the food chain, only 10 percent of the energy is passed on to the next level, while approximately 90 percent of the energy is lost as heat.