Across
- 8. matter is not created nor destroyed in any chemical or physical change
- 11. a long molecule consisting of many similar or identical monomers linked together.
- 12. a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
Down
- 1. a reaction in which two or more substances combine to form a new compound
- 2. materials found in nature that are used by living things
- 3. a reaction in which a single compound breaks down to form two or more simpler substances
- 4. reaction in which one element replaces another in a compound or when two elements in different compounds trade places
- 5. not naturally produced; made by artificial processes
- 6. a system in which no matter is allowed to enter or leave
- 7. a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
- 9. matter can enter from or escape to the surroundings
- 10. a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound