Across
- 5. a change that alters the form or appearance of a substance but doe not convert the mater into a new substance
- 6. a combination of symbols that represent the elements in a compound
- 11. the relationship between mass and volume of an object
- 13. a change in matter that forms one or more new substances
- 15. a way to show chemical reactions using element symbols instead of words
- 16. anything that has mass and takes up space
- 18. a substance that consists of two or more pure elements, compounds or both that are in the same place but NOT chemically combined
- 20. the force that holds atoms together
- 23. a substance that cannot be broken down into any other substances by chemical or physical means
- 26. the amount of space that matter occupies
- 27. Reaction occur when chemical bonds are made or broken and new bonds form making new substances
- 30. a particle made of tow or more atoms chemically bonded together
- 31. a type of chemical reaction when one element replaces another in a compound or when two elements in different compounds trade places
- 32. a type of chemical reaction when two or more substances combine to make a more complex substance
- 34. a type of chemical reaction when chemical bonds break compounds into simpler substances
Down
- 1. a type of chemical reaction that absorbs energy from its environment
- 2. the materials or substances at the beginning of a chemical reaction
- 3. a solid that forms from solution during a chemical reaction
- 4. a one or two letter set of characters used to identify an element
- 7. numbers in a chemical formula that show the number of atoms of an element in that molecule or the ratio of elements in a compound
- 8. the law that states that matter cannot be created or destroyed only transformed
- 9. a biological catalyst in cells
- 10. the amount of one material in a given volume of another material
- 12. the minimum amount of energy needed to start a chemical reaction
- 14. the materials or substances that results from a chemical reaction
- 16. the measurement of how much matter in an object
- 17. the number placed in front of a chemical formula in a chemical equation
- 19. a material used to decrease the rate of a chemical reaction
- 21. a type of chemical reaction that releases energy in the form of heat
- 22. the measure of energy in the environment
- 24. the measure of the force of gravity on an object
- 25. a material that increases the rate of a reaction by lowering the activation energy
- 28. the smallest particle of an element
- 29. a substance made of two or more elements chemically combined in a specific ratio or proportion
- 33. a well mixed mixture
- 35. the study of the properties of matter and how the matter changes