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183. Fact
Diamonds are the hardest substance known to man.

184. Fact
Which of the 50 states has never had an earthquake? North dakota.

185. Fact
When hydrogen burns in the air, water is formed.

186. Fact
Sterling silver contains 7.5% copper.

187. Fact
Cars were first made with ignition keys in 1949.

188. Fact
J.b dunlop was first to put air into tires.

189. Fact
Alexander graham bell, who invented the telephone, also set a world water-speed record of over seventy miles an hour at the age of seventy two.

190. Fact
It is energy-efficient to turn off a fluorescent light only if it will not be used again within an hour or more. This is because of the high voltage needed to turn it on, and the shortened life this high voltage causes.

191. Fact
The earth's equatorial circumference (40,075 km) is greater than its polar circumference (40,008 km).

192. Fact
Lake baikal is the deepest lake in the world.

193. Fact
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.

194. Fact
The earth's average velocity orbiting the sun is 107,220 km per hour.

195. Fact
There is a high and low tide because of our moon and the sun.

196. Fact
The united states consumes 25% of all the worlds energy.

197. Fact
Flying from london to new york by concord, due to the time zones crossed, you can arrive 2 hours before you leave.

198. Fact
There is enough fuel in a full tank of a jumbo jet to drive an average car four times around the world.

199. Fact
The surface speed record on the moon is 10.56 miles per hour. It was set with the lunar rover.

200. Fact
If you could drive to the sun -- at 55 miles per hour -- it would take about 193 years.

201. Fact
The moon is one million times drier than the gobi desert.

202. Fact
Just twenty seconds worth of fuel remained when apollo 11's lunar module landed on the moon.

203. Fact
A boeing 707 uses four thousand gallons of fuel in its take-off climb.

204. Fact
The planet saturn has a density lower than water. So, if placed in water it would float.

205. Fact
Since 1959, more than 6,000 pieces of 'space junk' (abandoned rocket and satellite parts) have fallen out of orbit - many of these have hit the earth's surface.

206. Fact
It takes 70% less energy to produce a ton of paper from recycled paper than from trees.

207. Fact
Every year in the us, 625 people are struck by lightning.

208. Fact
Hawaii is moving toward japan 4 inches every year.

209. Fact
The rocket engine has to supply its own oxygen so it can burn its fuel in outer space.

210. Fact
The north atlantic gets 1 inch wider every year.

211. Fact
Oxygen is the most abundant element in the earths crust, waters, and atmosphere (about 49.5%).

212. Fact
A stroke of lightning discharges from 10 to 100 million volts & 30,000 amperes of electricity.

213. Fact
A bolt of lightning is about 54,000f (30,000c); six times hotter than the sun.

214. Fact
Hydrogen is the most abundant element in the universe (75%).

215. Fact
The average distance between the earth & the moon is 238,857 miles (384,392 km).

216. Fact
The moon is 27% the size of the earth.

217. Fact
The center of the sun is about 27 million degrees fahrenheit (15 million c).

218. Fact
Sunlight takes about 8 minutes & 20 seconds to reach the earth at 186,282 miles/sec (299,792 km/sec).

219. Fact
The highest temperature on earth was 136f (58c) in libya in 1922.

220. Fact
The lowest temperature on earth was -128.6f (-89.6c) in antarctica in 1983.

221. Fact
Sunlight can penetrate clean ocean water to a depth of 240 feet.

222. Fact
The average ocean floor is 12,000 feet.

223. Fact
The temperature can be determined by counting the number of cricket chirps in fourteen seconds and adding 40.

224. Fact
House flies have a lifespan of two weeks.

225. Fact
Chimps are the only animals that can recognize themselves in a mirror.

226. Fact
Starfish don't have brains.

227. Fact
The average person falls asleep in seven minutes.

228. Fact
Shrimp's hearts are in their heads.

229. Fact
Every time you lick a stamp, you're consuming 1/10 of a calorie.

230. Fact
The longest recorded flight of a chicken is thirteen seconds.

231. Fact
Emus and kangaroos cannot walk backwards.

232. Fact
Cats have over one hundred vocal sounds, while dogs only have about ten.

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