These are the vocabulary words taken out of the Texas Science TEK 7.5. If you print them front to back, they have either the word or definition on one side and all of them have the same logo on the back side.
I print them on cardstock and use them to give students extra practice matching the word to the definition, or you can flip them all face down to play a "memory style" game.
The words used are matter, energy, radiant energy, photosynthesis, decay, biomass, food chain, food web, energy pyramid, and chemical energy.
The definitions are the ones I give to my students to memorize.