1. 200 300 400 100 200 300 400 100 200 300 400 100 200 300 400 100 200 300 400 100 States of Matter 500 Changes of State Demo’s & Labs Graphs Mixed Bag Final Jeopardy Question

2. The particles of this state are close together and vibrate in place

3. A solid

4. The volume and shape of this state can change

5. A gas

6. This state has a definite shape and volume

7. A solid

8. This is the only state that is compressible

9. A gas

10. The particles can slide past each other making this state pourable

11. A liquid

12. What do we call changing from a solid to a liquid?

13. Melting

14. What do we call changing from a gas to a liquid?

15. Condensation

16. Carbon dioxide changes from a solid directly to a gas through this process

17. Sublimation

18. Changes of state are physical changes for this reason

19. No new substances are formed

20. The freezing point of a substance is the same temperature as this

21. Melting Point

22. Define endothermic change.

23. When energy is absorbed (added ) during a phase change.

24. Temperature does not change during this process. The energy is being used to overcome the attraction between particles.

25. During a phase change (or change in state)

26. I left two bottles of water on my desk over winter break. One bottle was closed and the other was left without a cap on it. They both started out with the same amount of water in them, but when I returned, the open bottle had half as much water as the closed bottle. Which bottle represents a closed system? Which represents an open system? Why did the open bottle have less water? What phase change occurred here?

27. The bottle with the cap on it represents a closed system. The bottle that was left open represents an open system. The open bottle had less water because over winter break, water evaporated leaving the bottle. This is an example of vaporization, an endothermic change.

28. What is conservation of mass?

29. The idea that mass is not added or lost in physical or chemical changes.

30. Why can water boil at a temperature lower than 100°C?

31. It can boil at less than 100°C if the pressure is decreased (like if it is above sea level…in Denver…or on top of Mount Everest.

32. On a temperature vs heat energy graph, a change in state is represented by this

33. A horizontal line

34. Look at the following phase change diagram. What does letter D represent?

35. It shows where the liquid is changing from a liquid to a gas. The substance stays the same temperature until all the liquid has changed into a gas.

36. On a phase change graph, an upward sloping line represents this

37. That the temperature of the matter being heated is increasing. This also means that the kinetic energy is also increasing.

38. These two phase changes occur at the same temperature

39. Melting and Freezing or Boiling and Condensing

40. Below is a phase change diagram for a mystery substance. What substance is it? ElementMelting Point (°C)Boiling Point (°C) Phosphorus44280 Potassium64774 Arsenic81613 Sodium98883 Time (min) Temperature (°C)

41. Potassium

42. What is atmospheric pressure?

43. The weight of the gases in our atmosphere.

44. What is absolute zero?

45. The temperature at which all particle movement stops.

46. What is the form of vaporization that occurs on the surface of a liquid?

47. Evaporation

48. Define and give an example of crystalline and amorphous solid.

49. Crystalline-particles are arranged in a regular, repeating pattern. Example-diamond, iron, ice Amorphous-particles are randomly arranged Example-rubber, wax

50. Two of my favorite students are having an argument. Ron thinks that if you have a large pot of water and a small pot of water, they will boil at different temperatures and different times. Harry thinks that they will boil at the same temperature, but the large pot will take longer to boil than the small one. Who is right? Why??

51. Harry is correct. Since boiling point is a characteristic property; it doesn’t matter how much you have of that substance. A large pot of water will boil at the same temperature as a small pot of water. He is also correct in stating that the time it takes each pot to boil will be different. More water = more water molecules = more time to boil.

52. Place your bets now!

53. Why does your tongue stick to a flag pole on a cold day?

54. Heat is transferred from the warm spit on your tongue to the cold flag pole causing your spit to cool (exothermic) and it freezes!