science vocabulary

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Across
  1. 3. a substance form during a chemical reaction
  2. 8. a characteristic that can only be observed without changing the substance
  3. 10. large amount
  4. 11. means of changing one or more chemicals
  5. 12. the simplest unit of chemical compound that can exist
  6. 13. a property that depends on the amount of matter in a sample
  7. 14. a single substance either an element or a compound definite composition and properties
  8. 16. an insoluble solid form by a chemical reaction
Down
  1. 1. the process by which one or more substances change to produce one or more different substances
  2. 2. a substance formed by two or more substances which are chemically bonded during the chemical reaction
  3. 4. a characteristic that can only be measured or observed when atoms rearrange during a chemical reaction
  4. 5. a system that does not depend on the system size or the amount of material in the system
  5. 6. the smallest particle of an element
  6. 7. physical and chemical characteristics of matter used to describe or identify a substance
  7. 9. materials made from one or more natural substances that undergo a chemical reaction
  8. 15. a substance that undergoes change during a chemical reaction