Pretty much all of the energy that enters an ecosystem is solar energy. For a long time, it was thought that every ecosystem on the planet was solar based, but in the past few years an ecosystem was discovered on the bottom of the ocean where absolutely no sunlight reached. There were microscopic organisms that fed of of the sulfur that was being expelled by thermal exhaust vents. There were shrimp that fed off of these and several other species of animals lived off of the microorganisms and shrimp creating an ecosystem that did not rely on sunlight whatsoever.
Energy is used in organisms by transferring energy into mechanical and thermal energy. Anything an animal does requires energy so this is how it is used.
By heat into space.
check your answer
heat.
nuclear
heat
Heat
A great deal of energy is lost in the form of heat.
According to the law of conservation of energy, energy can't really get lost. The term "lost energy" really refers to energy changing from a high-value form to a lower value form, i.e., to a form in which it is no longer useful.
Heat or light. By the way, the energy is not 'lost', but rather turned into a different form of energy.
Heat energy
heat
The energy contained in the feces is not lost from the ecosystem. It can still be consumed by decomposers.
heat
Energy that is lost at each trophic level of an ecosystem is replenished by the producers. The producers get it from the sun.
heat
lost as heat or used
90 % is lost.
Heat
energy of a reaction will be lost in the form of heat.
A great deal of energy is lost in the form of heat.
Energy in an ecosystem flows in whats called the 10% rule. Meaning, as you move up the pyramid 10% of energy is lost.