How do living things get energy?

In most ecosystems, the energy for life ultimately comes from the Sun. Photosynthetic life forms absorb sunlight and use its energy to produce carbohydrates (sugars and starches). These get stored in the organism's tissues. Non-photosynthetic life forms then come along and consume the photosynthetic life forms (and each other) to obtain the energy that they need to live. So, the sun is the ultimate source of energy for most living organisms.

There are, however, some places where this is not true. There are places on the ocean floors where life exists completely independent of the Sun. These ecosystems are centered around submarine hot springs called black smokers. They are called this because the hot water coming out of the vents is heavy with sulfur compound that are black in color. It is these sulfur compounds that are the source of energy for these ecosystems. Some of the organism around the black smokers have developed the ability to derive energy from the sulfur compounds. Then other organisms eat them, etc.

So, there are two sources of energy for life here on Earth. The most important is the Sun. However, there are some places where energy is derive from sulfur compound expelled by hot springs on the bottom of the oceans.

Living things get their energy from a chemical reaction that is release when we consume food and it digested.


Sorry for it being short,)O:

Sustenance of life is critically dependent on energy transformations; living organisms survive because of exchange of energy within and without. In a living organism chemical bonds are constantly broken and made to make the exchange and transformation of energy possible. These chemical bonds are most often bonds in carbohydrates, including sugars. Other chemical bonds include bonds in ATP and acetate, which in turn is derived from fats and oils. These molecules, along with oxygen, are common stores of concentrated energy for the biological processes. One can therefore assert that transformation of energy from a more to a less concentrated form is the driving force of all biological processes that are a subset of chemical processes. Molecular biology and biochemistry are essentially the making and breaking of certain chemical bonds in the molecules found in biological organisms.

As with other natural phenomena, the exchange of energy in biological organisms also increase the entropy of the universe. All energy transformations studied in biology are due to the chemical synthesis and decompositions ultimately brought about by the energy absorbed from photons in sunlight through insolation and photosynthesis. The total energy captured by photosynthesis in green plants from the solar radiation is 91 x 10 ex26 joules of energy per year .

The predator-prey relationships, food chains, are in effect energy transformations within ecosystems that are studied in ecology.

This is all from the link.


http://en.wikipedia.org/wiki/Energy

Photons, directed by word.

Light. Illuminates all things composed for use of sustenance. Light is of the all powerful. Light transfers essential energy for life. Just a hypothesis to ponder.