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18. Evaporation 100 19. Boiling and condensing 107 20. Conduction of heat and convection 116 5. Radiant Heat and Light 122 21. How heat gets here from the sun; why things glow when they become very hot 122 22. Reflection 129 23. The bending of light: Refraction 136 24. Focus 142 25. Magnification 150 26. Scattering of light: Diffusion of light 158 27. Color 161 6. Sound 174 28. What sound is 174 29. Echoes 183 30. Pitch 185 7. Magnetism and Electricity 190 31. Magnets; the compass 190 32. Static electricity 196 8. Electricity 203 33. Making electricity flow 203 34. Conduction of electricity 213 35. Complete circuits 219 36. Grounded circuits 225 37. Resistance 229 38. The electric arc 233 39. Short circuits and fuses 240 40. Electromagnets 247 9. Mingling of Molecules 259 41. Solutions and emulsions 259 42. Crystals 265 43. Diffusion 268 44. Clouds, rain, and dew: Humidity 274 45. Softening due to oil or water