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Due to gravitational effects, your weigh
slightly less when the moon is directly overhead.
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Chewing gum or eating sugar cubes while peeling
onions will keep you from crying.
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Aluminum cans take 500 years to break down.
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After spending hours working at a computer
display, look at a blank piece of white paper. It will probably appear pink.
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During the day, the cartilage discs in the spine
are squeezed like sponges by gravity while you stand or sit. But at night, when
you lie down to sleep, the pressure is relieved and the discs swell again. For
the same reason, astronauts can be temporarily 50mm (2in) taller after a long
spaceflight.
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Ice is a mineral and is formally described as
such in Dana's System of Mineralogy.
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Laika (dog) became the world's first space
traveler. Russian scientists sent the small animal aloft in an artificial earth
satellite in 1957.
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The Skylab astronauts grew 1.5 - 2.25 inches
(3.8 - 5.7 centimeters) due to spinal lengthening and straightening as a result
of zero gravity.
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There are roughly 4,000 known minerals, although
only about 200 are of major importance.
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When hydrogen burns in the air, water is formed.
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Sound travels faster in liquids than in gases
because molecules are more tightly packed. In fresh water, sound waves travel
at 1,482 meters per second (about 3,315 mph). That's well over 4 times faster
than in air.
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Approximately 50-100 new minerals are described
each year.
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A common old wives tale is that fish grow to the
size of the aquarium. Actually they will continue to grow as long as they have
a quality environment. To find out, a group of researchers kept several trout
in a 3 inch diameter tube. Clean water was constantly circulated through the
tube. The trout eventually grew to fill the tube completely!
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Mineral elements taken from Earth provide the
colors. Strontium yields deep reds, copper produces blue, sodium yields yellow,
and iron filings and charcoal pieces produce gold sparks. Bright flashes and
loud bangs come from aluminum powder.
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40 to 50 percent of body heat can be lost
through the head (no hat) as a result of its extensive circulatory network.
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Diamonds are the hardest substance known to man.
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Fingerprints serve a function - they provide
traction for the fingers to grasp things.
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Sound waves travel the slowest through gases,
faster through liquids, and fastest through solids. Temperature also affects
the speed of sound.
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Sound travels through air at 331 meters per
second (about 740 mph). But, at 20ºC, room temperature, sound travels at 343
meters per second (767 mph).
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The speed of an aircraft is measured by
Anemometer
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The waste products are expelled as urine at the
rate of about 1.4 litres (2.5 pints) a day.
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The adult sperm whale will regularly dive to
depths of up to 1200 feet in search of their favorite food the Giant Squid. The
pressure at this depth is about 500 lbs per square inch. Scientists still do
not know how they can withstand the pressure.
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Lightning does not always create thunder. In
April 1885, five lightning bolts struck the Washington Monument during a
thunderstorm, yet no thunder was heard.
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Organic materials take 6 months to break down.
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A light-sensitive compound used in photography
is Silver bromide.
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The remains of diatoms, algae with hard shells,
are used in making pet litter, cosmetics, pool filters and tooth polish.
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Proteins are made of Amino acids.
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Depending upon the amount of salt in the water,
sea water freezes at about 28 degrees F.
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Talc is the softest of minerals. It is commonly
used to make talcum powder.
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Milk in its natural form has a certain amount of
sugar. This sugar is called Lactose.
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