Across
- 3. Is the amount of a substance in a given volume
- 4. Is a characteristic of a substance that describes its ability to change into another substance
- 6. Is a reaction that releases energy in the form of heat
- 7. Is a reaction in which energy is absorbed
- 9. In contrast to a synthesis reaction
- 12. Matters not allowed to enter or leave
- 14. when the reaction is complete and you have new substances
- 15. A material used to decrease the rate of a reaction
- 16. Is a characteristic of a substance that can be observed without changing the substance into another substance
- 18. The substances you have at the beginning
- 20. In chemistry when two or more elements or compounds combine to make more complex substance
- 22. Is the minimum amount of energy needed to start a chemical reaction
- 24. Is a short easy way to show a chemical reaction using symbols instead of words
- 26. When one element replaces another in a compound or when two elements in different compounds trade places
Down
- 1. A rapid reaction between oxygen and the substance
- 2. During a chemical reaction matter is not created or destroyed
- 5. Is anything that has mass and takes up space
- 8. Matter can enter from or escape to the surroundings
- 10. Is the number placed in front of a chemical formula in an equation
- 11. A change in matter that produces one or more new substances
- 13. Solid that forms from solution during a chemical reaction
- 17. Is any change that alters the form or appearance of a substance but that does not make the substance into another substance
- 19. The cells in your body contain biological catalysts
- 21. The study of matter and how matter changes
- 23. Is the material that releases energy when it burns
- 25. Is a material that increases the rate of a reaction by lowering the activation energy