Chemical Properties and Changes

7. New substances have new ________ after a chemical change.
9. The substance that form as a result of a chemical change.
10. The amount of a substance in a given volume.
12. Increasing this will cause substances to react more quickly.
15. To decay due to the growth of bacteria or fungi.
16. Rusting is an example.
19. Chemicals can be represented using these groups of chemical symbols and subscripts.

1. The only sure sign that a chemical change occurred is when new ________ form.
2. A chemical reaction involving a solid will occur more quickly if the surface area is ____________.
3. Letters are to atoms as words are to _________.
4. Mass is __________ during a chemical reaction.
5. The reddish coating that results from a chemical reaction between iron, oxygen, and water.
6. The difference in the types of properties is whether or not this changed while being observed.
8. When fruit rots it emits an ________ which is a sign of a chemical change.
11. A type of change in matter that results in a new substance with different properties.
13. What fuel does as it undergoes a chemical change.
14. Another name for a chemical change.
15. The substances that react together in a chemical reaction.
17. When this changes in leaves, it is a sign that a chemical change has happened.
18. Chemical equations must be __________ to show equal numbers and types of atoms on both sides.