Across
- 1. the amount of one material in a certain volume of another material
- 4. - a material that decreases the rate of a reaction
- 8. anything that has mass and takes up space
- 12. a reaction that releases energy in the form of heat
- 13. a system in which matter can enter or leave to the surroundings
- 14. the min. amount of energy needed to get a chemical reaction started
- 15. a physical trait of a substance
- 17. solid that forms from a solution during a chemical reaction
- 21. the process when substances undergo chemical changes to turn into a new substance
- 22. equation- a short/easy way to show a chemical reaction, using symbols
- 23. a substance that formed as a result of a chemical reaction
- 24. a system in which no matter is allowed to enter or leave
- 25. - a rapid reaction between oxygen and fuel that results in fire.
- 26. a property of a chemical/ can change
Down
- 2. a number in front of a chemical formula; tells how many atoms of each reactant and product are involved in a reaction
- 3. of mass- the principle stating that matter is not creator or destroyed during a chemical reaction
- 5. - a reaction in which 1 element replaces another in a compound or when 2 elem. in a different compound trade places.
- 6. study of properties of matter/how it changes
- 7. a reaction that absorbs energy in the form of heat
- 9. a chemical reaction that breaks down compounds into simpler products
- 10. - a chemical reaction with 2 or more simple substances combine to form a new, complex substance.
- 11. a material that increases the rate of a reaction by lowering the activation energy
- 16. a material that releases energy when it burns.
- 18. -a biological catalyst that lowers the activation energy of reactions in cells
- 19. - a substance that enters into a chemical reaction
- 20. changes the look w/o becoming a new substance