Boom Cards - States of MatterStates of Matter****Click Here for a Preview****This pack contains 30 cards that have photographs of real things. The students have to choose whether the photograph is showing a solid, liquid or gas. This is a good introduction to a States of Matter unit of work either online or in the class. The photographs are very good quality.To use Boom Cards, you must be connected to the Internet. Boom Cards play on modern browsers (Chrome, Safari, Firefox, and Edge). Apps ar