Across
- 4. The process where metals react with oxygen.
- 7. When a chemical change has occurred, it means the change is typically _______.
- 8. When matter decomposes, the _______ rearrange.
- 10. During the rusting process a new ______ called iron oxide (rust) is formed.
Down
- 1. When water changes states no new substance is ______.
- 2. A substance made up of H2O particles.
- 3. During rusting, iron particles lose electrons and oxygen particles ____ them.
- 5. When a new substance has been formed it means a ______ change has occurred.
- 6. During decomposition, microorganisms break down the organic matter into ______ pieces.
- 9. When decomposition takes place a new substance is formed, true or false.