Across
- 3. change the change of one or more substances into another substance(s)
- 4. a gas needed for combustion to happen
- 5. a process in which a substance reacts with oxygen and gives off heat
- 8. substances at the beginning of reaction
- 9. the energy required to start and sustain combustion
- 11. the process of starting a combustion reaction
- 12. two or more atoms that are connected by a chemical bond
- 14. a collection of solid, liquid, and gas particles released when a material is burned.
- 15. equation the number of atoms of each element is the same on both the reactant and product sides
- 19. a product of combustion, made of two hydrogen atoms and one oxygen atom
Down
- 1. instance of combustion in which fuel is ignited, giving off light, heat, and flame
- 2. substances at the end of reaction
- 3. reaction a process in which substances change into new substances
- 6. a pure form of matter
- 7. the ability to do work
- 10. a rapid combustion that releases large amounts of energy
- 12. the amount of matter or substance that makes up an object
- 13. dioxide a gas produced during combustion
- 16. of conservation of mass mass is never created or destroyed during a chemical reaction.
- 17. equation a representation that shows how chemical reactions produce products
- 18. a material used to produce heat or power by burning