1														2		3
4					5								6															7
8																									9
							10														11	12
		13
14									15						16
17				18								19															20
																					21
22								23
24
																		25
			26												27
		28						29				30
31
							32										33							34
														35								36				37		38
																								39
											40		41
											42											43
						44
						45
								46
				47

Across 2. ____________ energy is th energy of electrically charged particles moving from one place to another. 5. Energy is the ability to do ____________. 8. Iron oxide (the compound rust) is made when _______ (an element) combines with oxygen (an element ) in a chemical change. 10. ____________________ change is a change in which energy is taken in. 11. When solid iodine changes to a iodine gas the phyiscal change is a change in _______ . 13. When methane burns, the __________ are rearranged during the chemical change but they are not created or destroyed/lost.. 14. A chemical change is another way of saying a chemical ______________ . 16. In ________________ green plants transform electromagnetic energy to chemical energy. 17. Unlike a physical change a chemical change make one or more new ________________ with new properties. 19. Every physical and chemical change in matter includes a change in _____________ . 20. There are ______ forms of energy. 21. Potential energy is changed to kinetic energy as a biker ______ down a hill. 22. A __________________ climbing up a diving board, increases her potential energy as she climbs higher. 23. The law of _________________ of mass states that no matter is created or destroyed in any CHEMICAL or PHYSICAL change. 24. ____________________ energy is the internal energy stored in the chemical bonds between atoms and is a form of potential energy. 25. Gas, _____, or coal burning in a furnace are examples of combustion. 26. Some examples of phyiscal changes are bending, crushing, breaking and _______________ . 30. ___________________ changes release energy. For example, combustion is a ______________ change. 31. A substance that undergoes a physical ____________ is still the same substance after the change. 32. Stretching a rubber ________ increases potential energy. The more it is stretched the farther it will fly when released (kinetic). 35. Antoine _______________, a French chemist conducted experiments that proved that no mass of matter is lost or gained in chemical change. 39. One molecule of metane combines with ______ molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. 42. _______________ (a chemical reaction) is the slow combination of a substance with oxygen. 43. _____________ energy is the total of all the energy of all the particles in a object. 45. When hydrogen perioxide (a compound) is poured on a cut on your skin _____________ (an element) and water (a compound) are made in a chemical reaction. 46. A ______ changing to a liquid or a liquid changing to a gas are examples of physical changes. 47. A ___________________ change is any change that alters the form or appearance of matter but does not make any substance in matter into a different substance.

Down 1. ____________________ energy is the energy of matter in motion. 2. _____________ (a chemical change) is the use of electricity to break a compound into elements or simpler compounds. 3. __________________ energy includes visible light, radio waves, infrared "rays," microwaves, ultraviolet rays , and xrays. 4. Separating ______________ with filtration and distillation are examples of physical changes. 5. ___________ outside air has a higher average energy of motion (temperature) than cold air. 6. _________ such as natural gas, wood, candle wax, coal, and gasoline burn in air in a process called combustion. 7. _________________ ( a chemical change) is the rapid combination of fuel with oxygen producing heat, light, and new substances. 9. ____________________ is a measure of the AVERAGE energy of the random motion of particles of matter. 12. During a chemical reaction, chemical energy may be changed or ________________________ to other forms of energy. 15. ________________ is a phyical change. Sugar is sugar whether it is in a packet or mixed in water. 18. __________________ (a chemical reaction) is the slow combination of a bright metal with sulfu or another substance, producing a dark coating on the metal. 19. In electrolysis, two metal strips called ___________________ are placed in a solution but they do not touch. New substances are made as electrons are lost and gained at these strips of metal. 24. A _____________ change produces one or more new substances. 27. (two words no space) A gas stove combines oxygen and ___________ _______ (Methane-a compound) to produce heat as well as water vapor and carbon dioxide (a compound) in a chemical reaction.) 28. Breaking down ________ into hydrogen and oxygen is an example of electrolysis. 29. ___________ tarnishes so that it has a dark coating on the metal. 33. A rolling ____________ ball has kinetic motion. 34. Another name for the law of conservation of mass is the law of conservation of _________. 36. _________ of an iron fence is an example of oxidation. 37. The most _________________form of energy released or absorbed is thermal energy. 38. Thermal energy always flows From Warmer TOWARDS ___________ matter. 40. ______________ energy is the energy an object has because of its position. 41. Chemical changes in a _______ can give off electromagnetic radiation such as light. 44. A molecule of Methane has ___________ atoms of Hydrogen (H).