Across
- 2. butter will undergo this change in state when it is in the heat
- 5. A chemical reaction is another name for a
- 6. to find this in a substance, one must divide the mass by the volume
- 12. a natural chemical change when several compounds combine with energy from the sun to produce new substances
- 13. a chemical change when a slow combination of bright metal is combined with sulfur or another substance, producing a dark coating
- 14. a chemical change that occurs when electricity breaks a compound into elements or simmer compounds
- 15. forms new substances with new and different properties
- 16. the SI unit of mass
- 18. is the total energy of the motion of all the particles in an object
- 19. a change in matter that produces one or more new substances
- 20. a chemical change that occurs with a rapid combination of a fuel with oxygen produces heat, light and new substances
- 22. a change in which energy is absorbed
- 23. a measure of how hot or cold something is
- 25. flammability and reactivity can only be ____ during a chemical reaction
Down
- 1. what kind of chemical change occurs when a nail in your backyard begins to rust after it rains
- 3. The fact that matter is not created or destroyed in any chemical or physical change
- 4. this type of change is evident when a color changes
- 7. when a substance undergoes a physical change it is a
- 8. The ____ of the rock is twenty grams
- 9. any change that alters ONLY the shape or form of matter
- 10. alters the form or appearance of matter but does not turn the substance in the matter into a different substance
- 11. a change which releases energy
- 17. chemical properties describe the way ____ changes into new matter with different properties'
- 21. physical properties can be observed without _____ them
- 23. in a chemical change, a single substance breaks down into at least ___ or more substances to form different substances
- 24. Is dissolving a physical change?