I created this as a vocabulary review that can be used in different ways. Listed in this product are 25 vocabulary words that I teach with my Matter Unit. I have students first work as partners to see if the can correctly match up the vocabulary word with definition. After students have mastered this skill, they can then flip the cards upside down in two piles (words and definitions) and play Matter Concentration. This has worked as an easy way to get students reviewing necessary vocabulary. Great test prep activity! Also works well for ELA informational standards to tie in with scientific texts.