You are sorting cards with pictures of organisms and their descriptions into groups. you would place the card with an osprey and the description "organisms that obtain energy by consuming other organisms" with cards for other:

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

not sure if this is what you'r looking for eubacteria and archaebacteria