ATTENTION TO EVERY MEMBER OF THE SOCIETY

It is to be informed that from the month of May to June , all meetings has been terminated due to upcoming examinations and holidays ! Hope that everyone will strive hard for the challenges ahead and excel in every single paper that will be sat for.May blessings fall upon you ! Strive hard,study smart.Until we meet again on the next meeting, Good luck everyone.

Crystal Mok.

* Issue is subject to changes, no official notice has been given.

Chimpanzee Makes Udon!!!

This is our first ever presentation activity for the year. In order to capture every single member's views and ideas into one, we have planned an activity whereby members have to gather in a group to present an interesting topic related to the mathematics and science field.We gathered in the computer room of our school on the first floor of the building with given permission at 2.00 p.m. First group to lay their ideas and presentation was Lim Jia Ni, Loh Sok Cheng,Chong Pei Yi,Sajina,Tan Lee Ting,Elaine Tan.Together , they presented the topic " Animals have talents".From their ideas,it was truly spectatcular that we could all experience this eye-opening truth about animals.It was undeniable that their presentation was something that was fresh,light,interesting, eye catching and creative. They have used various source of information to come up informative,and quite comical with real-life experiences of this furry pets and adventurous creatures.The presentation put us through the message the group tries to convey, it is that Animals Do Have Talent !Here is a link to share of an interesting video that was presented on the day to let everyone have a glimpse of the Wows and OOs that we witnessed !



Crystal Mok

The lazy garderner

It takes two gardeners 8 days to mow a lawn.

One is lazy and one is energetic.

The energetic one would only take 12 days to mow it on his own.

How many days would the lazy gardener take to mow the lawn on his own?



by lee ting.

Problem at the Bank
A bank customer had £100 in his account. He then made 6 withdrawals, totaling £100. He kept a record of these withdrawals, and the balance remaining in the account, as follows:


Withdrawals Balance left
£50 £50
£25 £25
£10 £15
£8 £7
£5 £2
£2 £0

----------------------

£100 £99

Why are the Totals not exactly right?


by lee ting.

Coke Can Eruption

I can never forget the baffled faces of Maths n Science Club members when they were asked to open their coke can after shaking it vigorously.Everyone held their cans as far as they could from them-scared that the drink will spurt out.But for our great surprise...the drink did not spurt out.So lets see how does it work.

What You Need
-A fizzy drink

What To Do
First,shake the can vigorously.Then tap on top of the can 15-20 times.Now open the can and you notice that the drink did not spurt out.

How Does it Work
Fizzy drinks are fizzy because they have loads of carbon dioxide dissolved in them under pressure.If you have shaken the drink you will have mixed a whole lot of bubbles into the liquid.These bubbles have already started so if you open the drink immediately,the bubbles can expand rapidly creating foam.The foam is much larger than the can so the drink will spurt out.So by tapping the can it will dislodge the bubbles and therefore less amount of foam is produced.

Balloon Kebab

Its called Balloon Kebab.Anyway it was not eadible but it is a very challenging game.What do you think will happen when a sharp pointy thing meets a balloon-'BANG'.But the most challenging part of this game is to insert a skewer through the balloon without popping it.Amazing right???So now lets see how to do it.

What You Need
-Balloons
-Skewer

What To Do
Insert the skewer through the bottom of the moderate sized balloon,where it is tied off,where the rubber is dark and stretchy.Then try to push it through the very top of the balloon where it is the darkest.So that you have a balloon kebab.

How Does It Work
The darker section around the bottom where the rubber is less taut.This part and the area around the tied end can be penetrated with a sharp object without the balloon popping.In fact,the rubber tightens around the sharp object to keep air from escaping.

The chemical elements song

~sok cheng~

video on chemical learning........

hope u all will like tis........



~sok cheng~

Baking Soda Volcano

Well, we didn't really construct the volcano but it was fun all the same! Surely everyone has heard about this experiment right? No? Well, this will shed a little light.

MATERIALS & APPARATUS

~Test tube rack
~Test tube
~Sodium Bicarbonate
~Vinegar

PROCEDURE

1. Sodium bicarbonate is put into the test tube.
2. Vinegar is poured into a beaker.
3. Fill the test tube of sodium bicarbonate with vinegar.
4. Watch as the insides of the test tube begin to foam!
5. Want more action? Close the test tube with your thumb and shake it. Let go and the insides come spurting out!

Note: You might want to do this over a sink because it can get pretty messy.

HOW DOES IT WORK?

This project shows what happens when an acid (vinegar) and a base (baking soda) interact. Chemically, the acid and base neutralize each other, producing carbon dioxide gas as a byproduct. The exact reaction is:

HC2H3O2 (vinegar = acetic acid) + NaHCO3 (baking soda = sodium bicarbonate) = CO2 (carbon dioxide gas) + NaC2H3O2(sodium acetate) + H2O (water)

So, go on try this at home. Who knew chemistry could be so much fun?

Diaper Day

Yup, you read right. It was diaper day for the members today. Lets just say that no one was short of giggling when they saw the diapers. But it turned out the inner workings of a baby diaper were nothing short of fascinating.

MATERIALS & APPARATUS

~A clean diaper
~Beaker
~Scissors
~Water
~A plastic bag

PROCEDURE

1. Cut the portion of the diaper that absorbs moisture.
2. Take the inside lining out of the diaper and place in the plastic bag.
3. Give the plastic bag a vigorous shake or two.
4. After shaking it, you will be able to see granules at the bottom of the plastic bag. Collect the granules and place it inside the beaker. The inside lining of the diaper can be discarded.
5. Add water to the beaker, taking care that you do not add too much.
6. After a few minutes, the granules begin to crystallize.

Note: Discard the crystallized granules into the trash, not the sink.

HOW DOES IT WORK?
The material in the diaper is actually made from sodium polyacrylate, A Super Absorbent. Its nickname is the Super Slurper.

When sodium polyacrylate is exposed to water, the higher concentration of water outside the polymer than inside (lower sodium and polyacrylate solute concentration) draws the water into the center of the molecule via osmosis. Sodium polyacrylate will continue to absorb water until there is an equal concentration of water inside and outside the polymer.

It is used in baby diapers to keep baby bottoms dry. It is also a more convenient way to provide water to animals during transportation. The water soaked polymer crystals won't spill and animals can eat them to get water. Another common use is a soil substitute.

Have fun trying this experiment at home!

Science Facts

ScIEncE fAcTS

· Did you know that there are 206 bones in the adult human body and there are 300 in children(as they grow some of the bones fuse together).

·Flea's can jump 130 times higher than their own height. In human terms this is equal to a 6ft. person jumping 780 ft. into the air.

·The most dangerous animal in the world is the common housefly. Because of their habits of visiting animal waste, they transmit more diseases than any other animal.

·Snakes are true carnivorous because they eat nothing but other animals. They do not eat any type of plant material.

·The world's largest amphibian is the giant salamander. It can grow up to 5 ft. in length.

·100 years ago: The first virus was found in both plants and animals.

·90 years ago: The Grand Canyon became a national monument & Cellophane is invented.

·80 years ago: The food mixer and the domestic refrigerator were invented.

·70 years ago: The teletype and PVC (polyvinyl-chloride) were invented.

·60 years ago: Otto Hahn discovered nuclear fission by splitting uranium, Teflon was invented.

·50 years ago: Velcro was invented.

·40 years ago: An all-female population of lizards was discovered in Armenia.

·30 years ago: The computer mouse was invented.

·20 years ago: First test-tube baby born in England, Pluto’s moon, Charon, discovered.

·10 years ago: First patent for a genetically-engineered mouse was issued to Harvard Medical School.
5 years ago: The first successful cloning of human embryo

·The smallest bone in the human body is the stapes or stirrup bone located in the middle ear. It is approximately .11 inches (.28 cm) long.

·The longest cells in the human body are the motor neurons. They can be up to 4.5 feet (1.37 meters) long and run from the lower spinal cord to the big toe.

·There are no poisonous snakes in Maine.

·The blue whale can produce sounds up to 188 decibels. This is the loudest sound produced by a living animal and has been detected as far away as 530 miles.

·The largest man-made lake in the U.S. is Lake Mead, created by Hoover Dam.

·The poison arrow frogs of South and Central America are the most poisonous animals in the world.

·A new born blue whale measures 20-26 feet (6.0 - 7.9 meters) long and weighs up to 6,614 pounds (3003 kg).

·The first coast-to-coast telephone line was established in 1914.

·The Virginia opossum has a gestation period of only 12-13 days.

·The Stegosaurus dinosaur measured up to 30 feet (9.1 meters) long but had a brain the size of a walnut.

·The largest meteorite crater in the world is in Winslow, Arizona. It is 4,150 feet across and 150 feet deep.

·The human eye blinks an average of 4,200,000 times a year.

·Skylab, the first American space station, fell to the earth in thousands of pieces in 1979. Thankfully most over the ocean.

· It takes approximately 12 hours for food to entirely digest.

·Human jaw muscles can generate a force of 200 pounds (90.8 kilograms) on the molars.

·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.

·An inch (2.5 centimeters) of rain water is equivalent to 15 inches (38.1 centimeters) of dry, powdery snow.

·Tremendous erosion at the base of Niagara Falls (USA) undermines the shale cliffs and as a result the falls have receded approximately 7 miles over the last 10,000 years.

·40 to 50 percent of body heat can be lost through the head (no hat) as a result of its extensive circulatory network.

·A large swarm of desert locusts (Schistocerca gregaria) can consume 20,000 tons (18,160,000 kilograms) of vegetation a day.

·The largest telescope in the world is currently being constructed in northern Chile. The telescope will utilize four - 26 ft. 8 in. (8.13 meters) mirrors which will gather as much light as a single 52 ft. 6 in. (16 meters) mirror.

·The Hubble Space Telescope weighs 12 tons (10,896 kilograms), is 43 feet (13.1 meters) long, and cost $2.1 billion to originally build.

·The longest living cells in the body are brain cells which can live an entire lifetime.

·The largest flying animal was the pterosaur which lived 70 million years ago. This reptile had a wing span of 36-39 feet (11-11.9 meters) and weighed 190-250 pounds (86-113.5 kilograms).

·The Atlantic Giant Squid's eye can be as large as 15.75 inches (40 centimeters) wide.

·Armadillos, opossums, and sloth's spend about 80% of their lives sleeping.

·The starfish species, Porcellanaster ivanovi, has been found to live in water as deep as 24,881 feet (7,584 meters).

·The tentacles of the giant Arctic jellyfish can reach 120 feet (36.6 meters) in length.

·The greatest tide change on earth occurs in the Bay of Fundy. The difference between low tide and high tide can be as great as 54 ft. 6 in. (16.6 meters).

·The highest temperature produced in a laboratory was 920,000,000 F (511,000,000 C) at the Tokamak Fusion Test Reactor in Princeton, NJ, USA.

·The most powerful laser in the world, the Nova laser at Lawrence Livermore National Laboratory, CA, USA, generates a pulse of energy equal to 100,000,000,000,000 watts of power for .000000001 second to a target the size of a grain of sand.

·The fastest computer in the world is the CRAY Y-MP C90 supercomputer. It has two gigabytes of central memory and 16 parallel central processor units.

·The heaviest human brain ever recorded weighed 5 lb. 1.1 oz. (2.3 kg.).

·The deepest part of the ocean is 35,813 feet (10,916 meters) deep and occurs in the Mariana Trench in the Pacific Ocean. At that depth the pressure is 18,000 pounds (9172 kilograms) per square inch.

·The largest cave in the world (the Sarawak Chamber in Malaysia) is 2,300 feet (701 meters) long, 980 feet (299 meters) wide, and more than 230 feet (70 meters) high.

·The hottest planet in the solar system is Venus, with an estimated surface temperature of 864 F (462 C).

·The ears of a cricket are located on the front legs, just below the knee.

·The first electronic digital computer (called ENIAC - the Electronic Numerical Integrator and Calculator) was developed in 1946 and contained over 18,000 vacuum tubes.

·The leg muscles of a locust are about 1000 times more powerful than an equal weight of human muscle.

·The cosmos contains approximately 50,000,000,000 galaxies.

·There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy.

·Sound travels about 4 times faster in water than in air.

·Scientists have discovered that copper pollution of the atmosphere occurred about 2500 years ago. This was discovered by analyzing ice cores from Greenland. The pollution was attributed to the Romans who used copper for military purposes and to produce coins.

·Hydrofluoric acid will dissolve glass.

·In a full grown rye plant, the total length of roots may reach 380 miles (613 km).

·In a full grown rye plant, the total length of fine root hairs may reach 6600 miles (10,645 km).

·A large sunspot can last for about a week.

·If you could throw a snowball fast enough, it would totally vaporize when it hit a brick wall.

·Boron nitride (BN) is the second hardest substance known to man.

·The female Tarantula Hawk wasp paralyzes a large spider with her sting. She then lays her eggs on the motionless body so that her developing young have a fresh supply of spider meat to feed on.

·The seeds of an Indian Lotus tree remain viable for 300 to 400 years.

·The only letter not appearing on the Periodic Table is the letter “J”.

·Velcro was invented by a Swiss guy who was inspired by the way burrs attached to clothing.

·Hershey's Kisses are called that because the machine that makes them looks like it's kissing the conveyor belt.

·October 10 is National Metric Day.

·If you stretch a standard Slinky out flat it measures 87 feet long.

·The microwave was invented after a researcher walked by a radar tube and a chocolate bar melted in his pocket.

·Super Glue was invented by accident. The researcher was trying to make optical coating materials, and would test their properties by putting them between two prisms and shining light through them. When he tried the cyano-acrylate, he couldn't get the prisms apart.

·No matter its size or thickness, no piece of paper can be folded in half more than 7 times.

·A car traveling at 80 km/h uses half its fuel to overcome wind resistance.

·Knowledge is growing so fast that ninety per cent of what we will know in fifty years time, will be discovered in those fifty years.

·According to an old English system of time units, a moment is one and a half minutes.

·The typewriter was invented in 1829, and the automatic dishwasher in 1889.

·The wristwatch was invented in 1904 by Louis Cartier.

·When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.

·By raising your legs slowly and laying on your back, you can't sink in quicksand.

·Ten minutes of one hurricane contains enough energy to match the nuclear stockpiles of the world.

·Most gemstones contain several elements. The exception? The diamond. It's all carbon.

·Diamonds are the hardest substance known to man.

·Which of the 50 states has never had an earthquake?
North Dakota.

·When hydrogen burns in the air, water is formed.

·Sterling silver contains 7.5% copper.

·Cars were first made with ignition keys in 1949.

·J.B Dunlop was first to put air into tires.

·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.

·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.

·The Earth's equatorial circumference (40,075 km) is greater than its polar circumference (40,008 km).

·Lake Baikal is the deepest lake in the world.

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

·The Earth's average velocity orbiting the sun is 107,220 km per hour.

·There is a high and low tide because of our moon and the Sun.

·The United States consumes 25% of all the world’s energy.

·Flying from London to New York by Concord, due to the time zones crossed, you can arrive 2 hours before you leave.

·There is enough fuel in a full tank of a Jumbo Jet to drive an average car four times around the world.

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

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

·The moon is one million times drier than the Gobi Desert.

·Just twenty seconds worth of fuel remained when Apollo 11's lunar module landed on the moon.

·A Boeing 707 uses four thousand gallons of fuel in its take-off climb.

·The planet Saturn has a density lower than water. So, if placed in water it would float.

·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.

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

·Every year in the US, 625 people are struck by lightning.

·Hawaii is moving toward Japan 4 inches every year.

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

·The North Atlantic gets 1 inch wider every year.

·Oxygen is the most abundant element in the Earth crust, waters, and atmosphere (about 49.5%)

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

·A bolt of lightning is about 54,000蚌 (30,000蚓); six times hotter than the Sun.

·Hydrogen is the most abundant element in the Universe (75%).

·The average distance between the Earth & the Moon is 238,857 miles (384,392 km).

·The moon is 27% the size of the Earth.

·The Earth weighs 6.6 sextillion tons, or 5.97 x 1024 kg.


post by
Pei Yi