1. 1

2. 2

3. 3

4. 4

5. 5

6. 6

7. 7

8. 8

9. 9

10. 10

11.  Forces of attraction between particles are strong when they are close together  Particles cannot flow in a solid b/c the force of attraction between them is too strong  Liquids and gases can flow because the molecules have enough energy to break the forces of attraction between the molecules 11

12. 12

13. 13

14. 14

15. Resistance and Aerodynamics 15

16. 16

17. 17

18. 18

19. 19

20. 20

21. 21

22. 22

23. 23

24. 24

31. 31

32. 32

33. Comparing Densities – Things to Remember 33  Each pure substance has its own characteristic density  Solids have greater densities (usually) than liquids, and liquids have greater densities than gases

34. What portion of an iceberg is submerged? 34

35. 35

36. 36

37. 37

38. 38

39. 39

40. 40

41.  Buoyancy acts on objects immersed in a gas the same way it acts on objects immersed in gas – however there is ONE big difference between them  Density – the density of air is about 1/800 of that of water  You must displace a much greater volume of air to “float” in it 41

42. Buoyancy in WaterBuoyancy in Air 42

43. 43

44. 44

45. 45  Fluids run more easily when they are warm  Viscosity, density and buoyancy all change with changes in temperature  What happens when a fluid is cooled? How would this affect density if we know that d=m/v

46. 46  Water behaves differently from other fluids when the temperature changes