Ask a science teacher, how everyday stuff really works : why don't we feel the Earth spin? How do airplanes stay in the air? What makes blood red? and 247 other things you've always wondered about

Content: Machine generated contents note: ch. 1 The Magnificent Human Body --
1. How many cells are in your body? --
2. Why do the young and the elderly get sick more easily? --
3. What are birthmarks? --
4. Why is blood red? --
5. Why are we attracted to unhealthy foods? --
6. Why do we have nightmares? --
7. How do braces make your teeth straight? --
8. Why does the human body reject all other blood types except type O? --
9. Why do we cry? --
10. What is juvenile diabetes, and how can you get it? --
11. Can you drown from drinking too much water? --
12. Why does your heart stop when you sneeze? --
13. Why does a spinning motion cause nausea? --
14. What makes people\'s bones break, and how do they eventually heal? --
15. Why do we get goose bumps when we are cold? --
16. Why do we have fingernails and toenails? --
17. What are people made of? --
18. How does your heart pump? --
19. Why does blood in our veins look blue? --
20. Why is chicken pox so much worse for adults than it is for kids? Contents note continued: 21. Why do some people find it hard to remember things after they have had a head injury? --
22. How many organs are there in a person\'s body? --
23. How do you get hiccups? --
24. How did different skin colors come to be? --
25. What makes someone tone-deaf? --
26. What is human hair made of? --
27. Why do we age? --
28. What makes our eyes twitch? --
29. How does our body prepare for cold weather? --
30. Why does an extra chromosome cause Down syndrome? --
31. How do we grow? --
32. How do our brains work? --
33. Is there anything we can take to stop a heart attack? --
34. How does anesthesia work? --
35. What makes us right-handed or left-handed? --
36. Why does our hair go gray or white when we get old? --
37. How do we see color? --
38. Will we ever find a cure for cancer? --
39. How tall can people grow? --
40. Sometimes when I fall asleep, I awake with a muscle spasm. What causes this? --
41. How fast can a person run? Contents note continued: 42. When you look at something for a long time and then look away, why is the image still in your head but in a different color? --
43. Why do people\'s past injuries hurt when a storm is coming? --
44. Why can\'t we keep our eyes open when we sneeze? --
45. Are tanning booths safe? --
46. What is the doctor or nurse listening for through a stethoscope while taking your blood pressure? --
47. Why does liquid come out of some people\'s noses when they laugh? --
48. How many muscles are in the human body? --
49. Why do we blink? --
50. Why do people turn red when they get embarrassed? --
51. How am I the only one in my family with blond hair? --
52. What makes our eyes go bad? --
53. Why does helium make your voice go really high? --
54. Why are the pupils of our eyes black? --
55. Do identical twins have the same fingerprints? --
56. Why do they give iodine tablets to people who have been exposed to radiation? --
57. What is an autopsy? Contents note continued: ch. 2 Wonders of Our Sea and Land --
58. Why does it seem that most thunderstorms happen later in the day? --
59. Why is snow white, and where does its color go when the snow melts? --
60. Why does the Great Salt Lake have salt? --
61. What is the lowest temperature known in nature? --
62. Why does the horizon look like it touches the ground? --
63. How do you cut diamonds? --
64. Which way does the Earth rotate? --
65. What is the Bermuda Triangle, and why have people disappeared in it, never to be seen again? --
66. Why do rivers meander? --
67. Do lightning rods protect houses, or are they drawing in the lightning? --
68. If heat rises, why is a mountaintop colder than the bottom? --
69. Why are the oceans salty? --
70. Why is the Earth round? --
71. If there is no air in space, how is there air on our planet? --
72. What prevents skyscrapers from sinking into the ground? --
73. Why does it rain? --
74. What is the hardest material on Earth? Contents note continued: 75. How far is it to the bottom of the Pacific Ocean? --
76. What keeps the Earth in its orbit? --
77. What are the special conditions on Earth that allow it to support life? --
78. How do we know the Earth\'s age? --
79. How is dirt made? --
80. Why does the Earth have gravity? --
81. What creates the wind? --
ch. 3 Science in the Sky --
82. Why do we sometimes see the Moon in the daytime? --
83. What will happen to the Earth if the ozone layer keeps ripping? --
84. What are the white lines that you often see behind airplanes? --
85. Why does the Moon have craters? --
86. How were the Moon\'s phases named? --
87. What is the big red spot on Jupiter? --
88. Why does the Moon change color and size? --
89. How do clouds form, and how do they get their color? --
90. Early in the morning, I saw a bright light moving across the sky. What was it? --
91. Is it possible for a human to go to Mars? --
92. What are Saturn\'s rings made of? Contents note continued: 93. How close can you get to the Sun without burning up? --
94. How long would it take to travel from Earth to Venus in a rocket ship? --
95. If the Moon is so heavy, why doesn\'t it fall? --
96. How big is our galaxy? --
97. How does the Moon affect the ocean tides? --
98. When is Halley\'s Comet going to come around again? --
99. How do planets move? --
100. What are the chances of an asteroid hitting the United States? --
101. How many constellations are there, and how are constellations and stars named? --
102. If fire needs oxygen to burn, how can the Sun burn in space, where there\'s no oxygen? --
103. Why, when there is a clear sky and a full Moon, do you sometimes see a ring around the Moon? --
104. How do satellites always stay in the same place in the sky? --
105. What is a black hole? --
106. What is a shooting star, or falling star? --
107. Why do we bother to send people into space? --
ch. 4 Technology --
108. How was the Internet invented? Contents note continued: 109. How do helicopters steer? --
110. Is it possible for a car to run on vegetable oil? --
111. How do airplanes stay up in the air? --
112. How can a laser perform eye surgery without hurting the eye? --
113. What is horsepower? --
114. Why don\'t we use more wind power to generate electricity? --
115. How do remote controls work? --
116. How fast is one Mach in mph? --
117. How does Bluetooth work? --
118. Why have humans technologically progressed while all other animals have not? --
119. Why do magnets pull together? --
120. How do Legos connect together? --
121. How do rockets work? --
122. How is Styrofoam made? --
123. What types of fuel besides gasoline can be used to run cars? --
124. Why do train tracks buckle during hot weather and cause derailments? --
125. How do they decide how long airplane runways should be? --
126. What were the first guns like? --
127. What are halogen lights? --
128. Why can\'t we create a perpetual motion device? Contents note continued: 129. How do stitches dissolve? --
130. How do huge ships float? --
131. What happens when an airplane gets struck by lightning? --
132. How does a prism work? --
133. How do radar detectors work? --
134. How do cell phones work? --
135. How does a lightbulb work? --
136. How do lasers cut things? --
137. How do oxygen generators work? --
138. How do plasma television sets work? --
139. What makes a refrigerator so cold? --
140. How do counterfeit detector pens work? --
141. How does the metal wiring in a toaster heat up and stay hot? --
142. Why don\'t we build more nuclear power plants? --
143. How do glow sticks or light sticks work? --
144. How do touch lamps work? --
ch. 5 Stuff I Always Wondered About --
145. What exactly is science? --
146. Why are some people smarter than others? --
147. Why do people in some countries drive on the left side of the road? --
148. Why did the Twin Towers fall if planes only crashed into the top floors? --
149. How are coins made? Contents note continued: 150. What is that watery haze above the road in the summertime? --
151. How can the exhaust from a car harm us? --
152. Why doesn\'t soap taste as good as it smells? --
153. Why don\'t school buses have seat belts? --
154. How do you salt peanuts in the shell? --
155. What makes a golf ball curve? --
156. Why are tennis balls fuzzy? --
157. How many people live on planet Earth? --
158. How risky is driving a car? --
159. Why is \"pound\" abbreviated \"lb.\"? --
160. How do pay pool tables know which is the cue ball that needs to be returned? --
161. How do they keep the eternal flame burning on JFK\'s grave? --
162. Why are US elections held on Tuesdays? --
163. Why are there 5,280 feet in a mile? --
164. How do microwave ovens cook food? --
165. Why do car wheels sometimes look like they\'re going backward? --
166. Which came first, the chicken or the egg? Contents note continued: 167. Which will cause more damage: Running my car into a wall at 60 mph, or crashing my car, going 60 mph, into another car coming at me at 60 mph? --
168. If I dug a hole through the Earth and slid through, what would happen when I reached the other side? --
169. Is there a particular reason why interstate speed limits are usually about 65 mph? --
170. How is paper made? --
171. Why are manhole covers round? --
172. Why do we have leap years? --
ch. 6 Captivating Chemistry --
173. How can carbon monoxide be so dangerous but have no smell? --
174. What is it about onions that makes us cry? --
175. What makes the colors in fireworks? --
176. If water is made of hydrogen and oxygen, why doesn\'t it burn? --
177. How is glass made? --
178. How do they know how many calories are in food? --
179. How is gasoline made and how does it power cars? --
180. What is fire? --
181. What part of a flame is the hottest? --
182. What is lead made out of? --
183. What makes ice float? Contents note continued: 184. How do they separate oxygen from air to make oxygen tanks? --
185. How does yeast rise in an oven? --
186.I saw about one hundred train cars go by heading west that were labeled \"Molten Sulfur,\" What is molten sulfur, and what is it used for? --
187. Why does a helium balloon float, while an air-filled balloon does not? --
188. Both oil and water are liquids, so why don\'t they mix? --
189. What causes paper to yellow over time? --
190. How are the elements organized in the Periodic Table of Elements? --
191.I\'ve heard of hard water, but what is heavy water? --
192. What is in shampoo that makes it clean your hair? --
ch. 7 The Strange World of the Atom --
193. What is quantum physics? --
194. What happens when you split an atom? --
195. How do glow-in-the-dark objects work? --
196. Can you really use your tongue to tell if a battery is dead or not? --
197. Do cell phones give off radiation? Can you get cancer from using one too much? Contents note continued: 198. Why is radiation used in treating cancer? --
199. What makes an object transparent? --
200. How do atomic bombs work? --
201. What does Einstein\'s equation, E=mc2, have to do with atomic bombs? --
202. Why do doctors give you lead shields when you\'re getting X-rays? --
203. What is plutonium, and why is it used in bombs? --
204. What is an atomic clock? --
205. If we can\'t see atoms, how do we know what they are made of? --
206. What exactly is radiation, and what does it do to your body? --
207. How does static electricity make items cling together? --
ch. 8 Science Through the Ages --
208. Why was 1905 called Einstein\'s extraordinary year? --
209. Did Isaac Newton develop calculus? --
210. When and how did E. coli develop? --
211. When did we first discover the existence of another planet by telescope? --
212. Who or what built Stonehenge? --
213. How did they figure out the speed of light? --
214. How did dinosaurs become extinct? Contents note continued: 215. How did the Ice Age happen, and when will be the next one? --
ch. 9 Plants, Animals, and Other Living Things --
216. How does wood come from a seed? --
217. Do fish sleep? --
218. Why do plants have roots? --
219. Why do skunks smell so bad? --
220. Why do snakes bite? --
221. How do flowers get their colors? --
222. Do cats see in black and white? --
223. Humans can\'t grow back arms or legs, so why can some animals, like starfish, regenerate their limbs? --
224. How are bumblebees able to fly with such small wings and a big body? --
225. Why do birds chirp or sing? --
226. Why do sunflowers always face the Sun? --
227. What were the first dogs on Earth? --
228. Where can you find bacteria? --
229. Which animals are the most intelligent? --
230. Do pet owners and their pets understand each other? --
231. Why does a dog wag its tail when it is happy? --
232. How do scientists know how old dinosaurs are? --
233. How come parrots can talk, but other animals can\'t? Contents note continued: 234. Why do cows rechew their food? --
235. Why do dogs drool? --
ch. 10 Sound and Music --
236. What is a sonic boom? --
237. Is music mathematically based? --
238. Why does sound travel faster underwater? --
239. Why is it so quiet after a snowfall? --
240. How do compact discs work? --
241. What makes sound when two things collide? --
ch. 11 At the Fringes of Science --
242. Are we alone in the universe? --
243. How does brainwashing work? --
244. How does a magician saw a lady in half? --
245. If humans could fly, how big would their wings have to be? --
246. Why can\'t we invent a time machine, and what is a time warp? --
247. Is telepathy real? --
248. How many joules of energy would be fatal to a human? --
249. Is spontaneous combustion possible? --
250. Why do people say our \"fate is in the stars\"?