science stuff

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Across
  1. 3. An open system is a system that has external interactions
  2. 5. In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy
  3. 8. he action or process of replacing someone or something.
  4. 9. the state or process of rotting
Down
  1. 1. A chemical equation is the symbolic representation of a chemical reaction in the form of symbols
  2. 2. a substance that takes part in and undergoes change during a reaction.
  3. 4. a thing or person that is the result of an action or process.
  4. 5. a multiplier or factor that measures some property
  5. 6. the production of chemical compounds by reaction from simpler materials.
  6. 7. A closed system is a physical system that does not allow transfer of matter in or out of the system