But beyond these common states of matter, scientists have discovered a myriad of exotic states of matter that occur under special conditions. If you’re a little bit more versed in physics, you also know about the fourth fundamental state of matter called plasma - a hot ionized gas, with prime examples including lightning or neon signs. There are actually over two dozen states of matter (that we know of)Įverybody knows that there at least three states of matter: solid, liquid, and gas. Doing the math the average person with the average stride living until 80 will walk a distance of around 110,000 miles - which is the equivalent of walking about 5 times around the Earth, right on the equator. If you maintain that daily average and live until 80 years of age, you’ll have walked about 216,262,500 steps in your lifetime. The average moderately active person takes around 7,500 step/day.
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In an entire lifetime, the average person walks the equivalent of five times around the world Moreover, if you’d laid down end to end each water molecule from a teaspoon down end to end, you’d end up with a length of 50 billion km - 10 times the width of our solar system. There are 8 times as many atoms in a teaspoonful of water as there are teaspoonfuls of water in the Atlantic oceanĪ teaspoon of water (about 5 mL) contains 2×10 23 water molecules, but each water molecule is comprised of 3 atoms: two hydrogen atoms and one of oxygen. However, this fragile coral colony is beginning to crumble, battered by the effects of climate change, pollution, and manmade disasters. Spanning more than 2,000 km and covering an area of some 350,000 sq km, it is the largest living structure on Earth and the only one visible from space. The Great Barrier Reef is an interlinked system of about 3,000 reefs and 900 coral islands divided by narrow passages, located just beneath the surface of the Coral Sea. At over 2,000 kilometers long, The Great Barrier Reef is the largest living structure on EarthĬoral reefs consist of huge numbers of individual coral polyps (soft-bodied, invertebrate animals) that are linked together by tissue. In a way, some of the light that reaches us today is energy produced millions of years ago. The calculation is a little tricky, but the conclusion is that a photon takes many thousands and many millions of years to drunkenly wander to the surface of the Sun. In fact, we couldn’t survive without them. Don’t worry, though: most of these bacteria are helpful.
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It’s funny how we compulsively wash our hands, spray our countertops, or make a grimace when someone sneezes near us, when, in fact, each and every one of us is a walking petri dish! All the bacteria living inside you could fill a half-gallon jug - there are 10 times more bacterial cells in your body than human cells, according to Carolyn Bohach, a microbiologist at the University of Idaho. The average human body carries ten times more bacterial cells than human cells As an added bonus, you should know that we each share 99% of our DNA with every other human - just to show that we’re far more alike than different. There are about 37 trillion cells in the human body, so if you were to uncoil all of the DNA encased in each cell and place the molecules end to end, it would sum to a total length of 2×10 14 meters - enough for 17 Pluto round-trips ( t he distance from the sun to Pluto and then back again is 1.2×10 13 meters). DNA molecules of this size are 1.7 to 8.5 cm long when uncoiled - about 5 cm on average.
#The most unknown things in science code
The human genome (the genetic code in each human cell) contains 23 DNA molecules (called chromosomes), each containing from 500,000 to 2.5 million nucleotide pairs.