1. Like human being, ants stretch their bodies when they wake up. They also seem to YAWN in a human manner before they take up the tasks of the day. :)

2. The cuttlefish is one of the fastest adapting camouflage animals. It is able to change its colour from red to brown in less than one second. 

3. Birds perched on electrical energy cables are not electrocuted because it is easier for the electrical energy  to travel  through  the  cables  than the birds. The cables have a much lower resistance than birds.

4. Some biodegradable plastics slowly decompose in sunlight into smaller molecules which can then be broken down naturally by microorganisms.

5. Optical  fibres  are  modern tools  of  communication.  They use  the principle  of light reflection. Light that enters one end of the fibres is reflected. This happen many times until it leaves the other end.

6. Group 18 elements  consist  of helium, neon, argon, krypton, xenon  and  radon. These elements are known as noble gases. These are monoatomic, insoluble in water, cannot conduct electricity and are poor conductors of heat.

7. Hydrogen is the lightest of all gases. But it burns easily and is therefore dangerous to use. Helium does not burn easily. So it is generally used to fill balloons.

8. Some plants like pitcher plant and the venus fly trap are adapted for growing in soils that are poor in nitrogen containing salts. These plants trap insects and digest them to obtain nitrogen containing substances.

9. Eco-friendly paper is being produced from elephant dung at the Pinnawela Elephant Orphanage in Sri Lanka. An Elephant generates about 180 kg. of waste a day.

10. Dancing is the language of the bees. It gives other bees information about the location of plants on  which the  worker bees hand found food. Bees can feed off flowers upto 3 km.  from the hive.

The amount of carbon in the human body is enough to fill about 9,000 ‘lead’ pencils.

12.  The electric eel is a living ‘battery’ that can deliver deadly electric shocks. It has special muscles that can generate upto 650 volts of electricity. This is strong enough to kill other fish, stun a person or knock a horse off its legs! The electric eel uses its higher voltage electricity to catch prey and for self defense. It can also produce low voltage electricity to find its way in munky water.

13. The evaporation process is similar to the boiling process as it also involves a change in the  state  of  matter  from  liquid  to  gas. However,  evaporation  can take place at any temperature and only occurs to particles at the surface of a liquid.

When glass breaks, the cracks move at speeds of more than 4,500 km/h (3,000 miles).

15. The glow worm is a type of beetle. Only the female produces the greenish-yellow glow. This produces to attract a mate. The substance luciferin in its body causes the glow.

16. Each time lightning strikes, some Ozone gas is produced, thus strengthening the Ozone Layer in the Earth’s atmosphere.

17. The brain uses 20% of the body’s supply of oxygen and glucose. The brain cannot store  oxygen  and  glucose,  Therefore  an  insufficient  supply  of  either  one  will cause adverse effects to the brain.

18. Hardness of mineral can be measured by using the Moh’s scale. It is created by German mineralogist Friedrich Moh’s. On the Moh’s scale of hardness, diamond is ranked 10 while talc is I.

Most  of our  rubbish is burnt at a  place  called the incineration plant. After the rubbish is burnt, a magnet separates materials made of iron and steel from the ashes. The iron and steel are then sent for recycling.

20. Scientists have discovered the Solar System’s 10th planet, more than three billion kilometers further away from the Sun than Pluto, named Sedna. The object was spotted by the recently launched high-powered Spitzer Space Telescope.

21. In the 19th century, rabbits were imported into Australia. The rabbit population increased greatly  because  there  were  no  natural  predators.   The  rabbits  became  pests   and competed  with animals for food.  Finally a type of virus was introduced to kill the rabbits until its population was under control.

22. The sound a cow makes is low-pitched. The squeak of a mouse is high pitched. Some sounds are so high-pitched that the human ear cannot detect them. However, animals such as dolphins, bats and dogs can hear these sounds.

23. If the intestines of our body were not coiled we would have had to be nearly 33 feet tall. Now you know why they are coiled inside our body.

24. Sulphur dioxide is used in preserving bottled food like jam and tomato ketchup. This gas has  two  effects  on  food. It prevents a moulds from growing in alcoholic drinks and fruit juices, and dried fruits from turning brown.

25. Have you experienced your hair standing up momentarily when you go close to a television or computer screen that is switched on?

Your hair also stands up in the some way when a plastic sheet is placed over your head or  near  your arm.  These  effects  are  caused  by  static  charges(“static”  means  “not  moving”).

27. The first true parachute jump was made from a balloon in 1797, when Andre-Jacques Garnerin safely descended 680 m. beneath an enormous umbrella-shaped canopy.

28. The first rocket was launched by Chinese scientists in the year 1200. This rocket used gunpowder.  However,  the first  liquid-propelled  rocket  was launched in  1926,  by an American, Robbert Goddard. This type of rocket paved the way for space travel.

29. The mass of our entire atmosphere is estimated to be some 5.5 quadrillion tons(55 followed by 14 zeroes).

30. In an adult, the skin makes up about 7% of the total body weight. It covers an area of about 175 m2(as big as a dining table).

31. A bat’s navigation system is similar to the sonar system. It sends out pulses of ultrasonic waves. These waves bounces off insect in bats path and returns to bat.

32. The mouth is  a suitable place for bacteria to grow and multiply in the crevices between teeth because it is moist, dark, of the correct temperature (37 0C) and food particles are present. This may result in tooth decay and gingivitis.

Neutrons and protons are collectively called nucleons because neutrons and protonsoccupy the nucleus.

34. Michael  Faraday  (1791 – 1867)  was the pioneer scientist in the field of electrolysis. He worked on experiments which involved effects of electricity and developed two important laws called Faraday’s Laws of Electrolysis.

35. Lord Kelvin invented a scale of temperature based on the fact that it is impossible to get below a temperature of about -273 0C. Scientists now use this scale, in which these temperature is zero and the boiling point of water is 273.15 Kelvin. One Kelvin is equal to I 0C.

36. Magnets have  to  be stored  carefully  or they will get weaker as time goes by. Pieces of iron can be placed across the ends of a pair of magnets to make them last longer. These are called keepers.

Lasers produce beams of light that are strong enough to cut through metal. Doctors use lasers to perform laser eye surgery and destroy cancer cells.

38. The colour images  that  you see on a television screen are due to the light emitted by three types of phosphor coatings. These emit red, blue and green light when struck by electrons coming from the electron gun at the back of the television.

39. James Watt (1736-1819)- The unit of power is named after a British engineer James Watt., in honour of his contribution to the development of the steam engine.

40. In  1819,  Hans  Christian  Oersted  (1777-1851),  a  Danish  physicist,  accidentally discovered that an electric current change the direction of a nearby compass needle.The deflection of the needle was  caused by  the magnetic  field around the wire that carried the current.
41. Sir Isaac Newton, an English scientist, was the first person to separate sunlight into a spectrum of seven colours.

42. Dancing is the language of the bees. It gives other bees information about the location of plants on  which the  worker bees hand found food. Bees can feed off flowers upto 3 km. from the hive.

43. Scientists  have classified  viruses as  non-living  things because  viruses  are not  cells. Viruses do not use energy to grow or to respond to their surroundings. They also cannot make food, take in food or produce wastes.

44. Visible light is only a very small portion of full electromagnetic spectrum and it is used to observe things. Non-visible parts of the spectrum are commonly used in communication applications.
45. 70%  of our body  weight is made up of water, Humans lose about 1.5 litres of water perday through urine, foces, exhaled air and sweat. A loss of 5% of the body’s total volume of water can lead to unconsciousness.
46. If a person weights himself on the Moon, his weight would be only one-sixth of what it is on Earth. His mass, however, remains the same whether he is on the Earth or the Moon.
47. We  can use  X-rays to see  bones  and other parts inside our bodies. This is because x- rays can pass through most solid materials. X-rays are also used by airport security staff to see the contents inside people’s luggage.
48. Yogurt  contains  useful  bacteria.  The bacteria are known as probiotics. Most scientists believe that probiotics can enhance the immune system of the human body and prevent constipation.
49. Alexander Flemming (1881-1955), in one of his investigations, found that a certain Mould prevented the growth of bacteria. This discovery led to the development of antibiotics.
50. Brownian movement is the random movement of particles in liquids or gases which can be observed when the  particles collide  with each  other.  This  concept is based on the experiment carried  out  by  a botanist  named  Robert Brown (1827).  He observed  the movement of pollen suspended in water using a microscope.