Did You Know?
Travel By Magnet
Homing pigeons and whales use the earth's magnetic poles to
navigate. Earth's magnetic filed is produced by electric
currents generated by metals found naturally in Earth's outer
core. Scientists believe Earth behaves like one big round
magnet. The point where the magnetic field lines leave Earth's
surface pointing straight up is called the Magnetic South Pole;
the point where the magnetic field lines point straight down is
the Magnetic North Pole.
a Deep Breath
In a resting position, a healthy person inhales and exhales
about 16 times a minute. The respitory system delivers oxygen to
body systems and gets rid of unnecessary carbon dioxide. And
believe it or not, your left lung is slightly smaller than your
The Top Five
Most-Spoken Languages in the World
Mandarin Chinese: 1 billion speakers
English: 700 million speakers
Hindi: 497 million speakers
Spanish: 293 million speakers
Russian: 280 million speakers
About 900 earthquakes occur every hour. Most of these are very
minor and probably can't be felt by humans.
Earthquakes are sudden violent shifting movements in the earth's
crust. They are caused when the tectonic plates that make up the
earth's surface collide, separate, or scrape against each other.
What does EPCOT mean?
EPCOT: Experimental Prototype Community of Tomorrow
LASER: Light Amplification by Stimulated Emission of Radiation
NATO: North Atlantic Treaty Organization (Peacekeeping alliance)
PIN: Personal Identification Number (used for bank cards, credit cards, etc.)
RAM: Random-Access Memory (short-term computer memory)
ZIP code: Zone Improvement Plan
ROY G BIV aka Rainbow Man
A ray of sunlight actually produces a spectrum of seven colors. You can remember the visible spectrum- red, orange, yellow, green, blue, indigo, violet- by remembering the name of one colorful fellow, ROY G. BIV.
If you toss a coin 200 times, either head or tails will come up 6 or more times in a row!
Probability is a number used to describe the chance that something will happen. If you toss a coin, a result of heads is one chance in two (the other result is tails). In math, we express probability with a ratio, like 1:2, or a percentage, 50%. So, no matter how many times you toss a coin, the probability that it will be heads is 1:2. You can count on it!
It would take about 9.5 years to read out loud, without stopping, all the DNA information present in one person. The nucleus in a cell contains small parts called chromosomes. Ever human cell contains 46 chromosomes, 23 from each parent. The material in each chromosome that carries the information is called deoxyribonucleic acid, or DNA. The DNA molecule looks like a twisted ladder, known as the double helix.
The instructions in the DNA are called genes. Genes are what determine eye color, hair color, whether or not you can roll your tongue, or if youíre good at sports. Plant genes determine such traits as height, shape of leaves, and flower color.
Blood is made up of living cells. In one tiny drop of blood there are 250,000,000 red blood cells! Blood is made up of red blood cells, white blood cells, platelets and plasma. The red blood cells carry the oxygen. The white blood cells fight infection and disease. Platelets are tiny bits of cells that help stop bleeding. Plasma is the liquid part of blood that carries nutrients to the rest of the body.
Paper money is actually made out of rags!
Rag fibers made from cotton are stronger than paper fibers. Thatís why a dollar bill doesnít fall apart when you accidentally wash it along with your jeans.
American money is based on the decimal system. We add, subtract, multiply and divide money the same way we do any decimal numbers.