What term refers to all the different species which live in an ecosystem?

That word is Biodiversity

Biodiversity

Explanation:

The variety of different species present in the community of an ecosystem: Biome

the answer is:

carbon dioxide

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy