Across
- 3. a process that absorbs energy
- 7. a system that does not allow matter or energy to enter or escape
- 9. happens when one chemical substance is transformed into one or more different substances as a result of a change in the arrangement of atoms, such as when iron becomes rust
- 12. to form an insoluble solid (cannot be dissolved) when two liquid solutions are mixed
- 13. an early sample of a product that gives information about how the device or system works
Down
- 1. mass is neither created nor destroyed during a chemical reaction
- 2. a symbolic representation of the reactants and products in a chemical reaction
- 4. a process that releases energy
- 5. a system that allows matter or energy to enter or escape
- 6. saved nothing lost or gained
- 8. the total energy of motion of the particles in a sample of a substance
- 10. the physical form of matter-solid, liquid, or gas
- 11. to mix into another substance