Category: SciFun

Believe it or NOT….

Discover the Amazing Facts… True but hard to believe….

-Sunglasses were invented by the Chinese as a way for judges to hide their emotions in the courtroom!

-With a melting point of 85-degree Fahrenheit, you can turn a solid cube of Gallium into a liquid just by holding it in your hand!

-The venom from a Golden Lancehead bite is so potent that it’s capable of melting human flesh!

-After examining samples of a 15,000-year-old Tibetan glacier collected in 1992 and 2015, scientists discovered 28 never before seen virus groups

-Team ScienceNow

Do you Know??

Know the fascinating Facts….

Why is DIAMOND the hardest substance on Earth

Diamonds are incredibly hard because they have crystallized in a particular atomic shape after being subject to the effect of heat and pressure on Earth at a depth of 140 to 150 kilometres. This makes diamond the hardest mineral on earth and cannot be broken or cut easily. It is only possible by using another diamond.

Why do FORMULA 1 driver lose weight

The F1 drivers can lose up to three kgs weight after a race due to extreme heat in the cockpit of the vehicle. Hence, the drivers take in large amounts of water before the race, even if they do not feel thirsty, to avoid dehydration through sweating

Why do we get HEATSTROKE

Heatstroke is a condition caused by your body overheating, usually as a result of prolonged exposure to or physical exertion in high temperatures. This most serious form of heat injury – heatstroke, can occur if your body temperature rises to 104 F (40 C) or higher.

Why do NEWSPAPERS turn yellow over time

Paper is made from wood, which is made up mainly of white cellulose. Wood also has a lot of a dark substance in it called lignin, which ends up in the paper, too, along with the cellulose. The exposure of lignin to air and sunlight is what turns paper yellow.

Why is SUN harsh in summer

In the early morning and late evening, UV (ultraviolet) radiation is less strong because the rays have farther to travel to get to the Earth. But throughout the year, the sun’s angle varies with the seasons, so the strength of UV rays change, too. UV rays are strongest in the summer months.

-Team ScienceNow

What if? ?

Ocean Currents Stops

Ocean currents play a significant role in controlling climate around the globe. These currents act like a giant conveyor belt, warming and cooling parts of the Earth as water circulates. Melting ice caps, which can happen due to global warming, can cause ocean waters to circulate and have a drastic effect on climate…

What are Ocean Currents ?

Around the world, there are a number of ocean currents which have a serious impact on climate. For instance: The Gulf Stream in the Atlantic transports warm water with a high level of salinity and low density from equatorial regions further north on the ocean’s surface, warming countries such as the United Kingdom.

The further north the water travels, the cooler it gets. Cold water becomes denser, falls further towards the bottom of the ocean and is carried back further south. This causes a continual ocean current in the North Atlantic.

Global Warming

Polar ice caps are beginning to melt due to global warming. Since ice caps are composed of freshwater, and if they continue to melt, it would bring down the level of salinity in the surrounding ocean waters. Changes in salinity levels could affect thermohaline currents by preventing water from achieving enough density to sink to the bottom of the ocean. More seriously, ocean currents could stop completely.

Effects of Ocean Currents

If ocean currents were to stop, climate could change drastically, especially in Europe and countries in the North Atlantic. In these countries, temperatures would drop, affecting humans as well as plants and animals. In turn, economies could also be affected, particularly those that involve agriculture. If these effects were to continue, Europe, North Atlantic countries and parts of North America could experience long periods of freezing conditions. Also, if ocean currents stopped because of climate change it will have many other affects associated with the globalwarming phenomenon.

Earlier Phenomena

Earlier evidence of rocks and ice have shown that ocean currents have indeed stopped for periods of time in history. One example can be found around 13,000 years ago when the warmth experienced at end of an ice age caused large masses of ice to melt into the sea.

The resulting changes in water density stopped ocean currents from flowing and caused freezing conditions in some parts of the world for over 1,000 years.

-Team ScienceNow

Riddles

Solve This

A king once condemned a prisoner and wanted to give him a very harsh punishment. He keeps

a glass containing some hydrochloric acid and another containing an equal amount of sodium

hydroxide before the prisoner and asks him to drink both of them. The prisoner knows that the acid is highly corrosive and will destroy the mucous lining, as well as his oesophagus.

The other solution is equally bad and will cause him to collapse. But he goes ahead and obeys the

order. The king finds that the prisoner has survived without any ill effects. How did he manage it?

Answer:

The prisoner understood the chemical reactions well. He knew that an acid is always neutralized by an alkali. So he poured the liquids in the two glasses into a third empty glass. When they thus got mixed, they reacted producing salt and water. These were harmless, except for the salty taste!

HCl + NaOH = H 2 O + NaCl

-Team ScienceNow

Just incredible facts to make you believe…

• You are taller in the morning than you are at night! The reason being when you sleep, your spine is no longer subjected to the pressures of gravity.
• Scientists can locate colonies of penguins from space just by looking for dark ice patches of penguin poop!
• After a year in space, astronaut Scott Kellys genetic makeup changed so drastically that his DNA no longer matches his twin brother’s!
• Albert Einstein’s eyes are in a safe deposit box in New York city!
• Firefighters in Dubai tackle blazes in high-rise buildings and bridges wearing jetpacks!
• The US Military is developing Robotic Horses to carry heavy equipment into battle!
• Solar flare explosions of energy on the surface of the sun can be 100,000 times more powerful than all the nuclear weapons on Earth!

-Team ScienceNow Digital

Fun with Science

SCIENCE QUESTIONS

What’s the Colour of Mirror?

It’s actually green. A human eye can distinguish between 10 million different colours. But to identify the colour of mirror, whether it is white or silver is very difficult. Mirror reflects the colour that is seen in it. It reflects all the images in the exact opposite direction due to angle of reflection and distance. But every mirror absorbs a very tiny amount of light within the 510 nanometre range. So, as the spectrum of visible light is green, the colour of the mirror is technically little green. 

Where Do Permanently Deleted Files Go in Computers?

Actually the computer doesn’t delete anything. When we delete a file, we just put it into a new address or a pointer on the hard disk where it is stored. Large files are stored in multiple locations. When we open a file, the hard drive follows the pointer to identify the data. Thus any file is never erased and is always physically present on the hard disk. The files can be retrieved using special software. The data can only be erased when the hard disk is destroyed.

Where is the Centre of Universe?

The universe started with a “Big Bang” about 13.7 billion years ago and it has been expanding ever since. The centre of this expansion is everywhere. No matter where you are in the universe, everything will seem to be expanding or moving away from you at the same rate. Everything looks the same in every direction. So, there’s no one particular centre of Universe, rather the Centre of Universe is everywhere. 

Why does fish smell so strongly?

In order to maintain fluid balance, fishes must fill their cells with amino acids and amines to remain safe from the saltiness of seawater. Ocean fish have trimethylamine oxide (TMAO) for this purpose. However once the fish is killed and bacteria and fish enzymes convert TMAO into trimethylamine, it gives off the characteristic fishy odour.

Why do taste buds change over time?

As we age, our taste buds actually change. Most of what we think of as taste comes from our noses’ smell receptors. As we age, it gets harder for our body to replace those receptors when they die off. As a result, people in old age are sometimes less sensitive to taste and so they gravitate toward things that have stronger, more detectable flavours.

-Team ScienceNow Digital

Test your grey matter….

1. Which of the following is a large blood vessel that carries blood away from the heart?
A. Vein
B. Artery
C. Capillary
D. Nerve

2. Which of the following is not a member of the Vitamin B complex?
A. Thiamine
B. Riboflavin
C. Folic acid
D. Ascorbic acid

3. Fungi are plants that lack:
A. Oxygen
B. Carbon dioxide
C. Chlorophyll
D. None of these

4. What makes a reptile a reptile?
A. Cold blooded
B. Warm Blooded
C. Non-Hearing
D. Egg-laying

5. Which blood vessels have the smallest diameter?
A. Capillaries
B. Arterioles
C. Venules
D. Lymphatic

6. Tell the composition of soap?
A. Sodium salt with fatty acids.
B. Potassium salt with fatty acids
C. Both a & b
D. Sodium and Potassium salt mixed with chemicals

7. Which of the following compound is not used as an alkali?
A. Sodium hydroxide
B. Potassium hydroxide
C. Carbon hydroxide
D. Nitrogen hydroxide

8. Which acid is present in lemon?
A. marlic acid
B. citric acid
C. lactic acid
D. tartaric acid

9. Natural rubber is a ________ which is having high elasticity.
A. Substance
B. Material
C. Elastomer
D. Chemical using carbon as main compound

10. Which of the following is not a type of elements?
A. Metals
B. Non Metals
C. Metalloids
D. Gases

11. What is the full form of ASLV?
(A) Augmented Satellite Launch Vehicle
(B) Automatic Satellite Launch Vehicle
(C) Aero Space Launch Vehicle
(D) Area Satellite Launch Vehicle

12. Which is India’s first experimental satellite launch vehicle?
(A) ASLV
(B) GSLV
(C) SLV 3
(D) None of these

13. When was the Indian Space Research Organisation (ISRO) was set up?
(A) 1962
(B) 1969
(C) 1972
(D) 1952

14. Where is the Headquarter of ISRO?
(A) Chandipur
(B) Bengaluru
(C) Mahendragiri
(D) Chennai

15. The weight of an Object on planet Mars is 348 N. Then what will be the mass of the object?
(A) 100 Kg
(B) 100 Gm
(C) 3.48 Kg
(D) 348 Kg

16. A boy standing at a distance of 172.5 meter from the base of tower shouted ‘Hello’. After what time can the boy hear the echo if the speed of sound is 345 meter per second?
(A) 0.5 sec.
(B) 1 sec.
(C) 1.5 sec.
(D) 2 sec.

17. On what principle is the construction of submarine based on?
(A) Law of gravitation
(B) Law of Inertia
(C) Pascal’s law
(D) Archimedes’ principle

18. A car travels 500 m distance in 3 minutes. What will be its speed in kilometre per hour?
(A) 120
(B) 100
(C) 15
(D) 30

19. Find the power of an engine working at the rate of 60 Joule/min?
(A) 60 watts
(B) 10 watts
(C) 0.1 watt
(D) 1 watt

20. When an object is kept between two plane mirrors making a certain angle, 5 images are formed. What is the measure of an angle between the plane mirrors?
(A) 60 degree
(B) 90 degree
(C) 120 degree
(D) 72 degree

21. In which pair, units of given physical quantities are different?
(A) speed, velocity
(B) energy, work
(C) density, volume
(D) weight, force

22. The fluorescent tubes and neon sign bulbs glow because of ___________
(A) High density of gases
(B) High temperature of gases
(C) High applied voltage
(D) Presence of charged particles

23. The ratio of the masses of moving objects X and Y having equal momentum is 1:2. Determine the ratio of their velocities.
(A) 2:1
(B) 1:2
(C) 4:1
(D) 1:4

24. Which of the following does not have methane as a major component?
(A) LPG
(B) LNG
(C) CNG
(D) Biogas

25. The batteries in the satellite are recharged by _____________
(A) Changing chemicals in the batteries
(B) Changing electrodes in the batteries
(C) Solar panels when there is sunlight
(D) Photo electric cell at any time when necessary

-Team ScienceNow Digital

Answer
1 Ans. B 2 Ans. D 3 Ans. C 4 Ans. D 5 Ans. A 6 Ans: C 7 Ans: D 8 Ans: B 9 Ans: C 10 Ans: D 11 Ans: A 12 Ans: C 13 Ans: B 14 Ans: B 15 Ans: A 16 Ans: B 17 Ans: D 18 Ans: B 19 Ans: D 20 Ans: A 21 Ans: C 22 Ans: D 23 Ans: A 24 Ans: A 25 Ans: D

 

Believe it or Not!

• Time passes slower the faster you move!
• You can see without your glasses! All you have to do is make a pinhole with your hand, which will help you focus the light coming into your retina. Sure, it won’t give you 20/20 vision, but it’s a good start if you’ve left your glasses at home!
• There is enough DNA in the average person’s body to stretch from the sun to Pluto and back 17 times!
• Except for identical twins, each person on Earth has a unique smell!
• By the time you go to bed at night you are about 1 cm shorter than when you woke up that morning! This is because the cartilage between your bones is compressed throughout the day.

-Team ScienceNow Digital

Solve This

A king once condemned a prisoner and wanted to give him a very harsh punishment. He keeps a glass containing some hydrochloric acid and another containing an equal amount of sodium hydroxide before the prisoner and asks him to drink both of them. The prisoner knows that the acid is highly corrosive and will destroy the mucous lining, as well as his oesophagus. The other solution is equally bad and will cause him to collapse. But he goes ahead and obeys the order. The king finds that the prisoner has survived without any ill effects. How did he manage it?

Answer:

The prisoner understood the chemical reactions well. He knew that an acid is always neutralized by an alkali. So he poured the liquids in the two glasses into a third empty glass. When they thus got mixed, they reacted producing salt and water. These were harmless, except for the salty taste!

HCl + NaOH à H₂O + NaCl

-Team ScienceNow Digital

 

QUIZ

1) When you stand on the ground, what is the distance of the horizon from you?

1. A) 500 km B) 5 km C) 15 km    D) 50 km

 

2) If we ever make contact with aliens, which of our fundamental units is likely to match them?

1. A) Kelvin B) Light year C) Atomic Mass Unit   D) None of these

 

3) If a person beats drum on the Earth and an astronaut beats an identical drum in space, what will be the differences in the effects?

1. A) There will be no vibration in the drum in space
2. B) There will be vibration in space but no sound.
3. C) The drum on Earth will vibrate for a longer time then the one in space.
4. D) There will be no difference in terms of the vibrations or sound.

 

4) A student fails to complete a presentation. The angry team leader launches him into a rocket far into space and then throws him out. The student just grazes the upper edge of the atmosphere during his trajectory. He will…

1. A) Go around the Earth
2. B) Crash on the Moon
3. C) Get lost into deep space
4. D) Reach the same place venue again.

 

5) A star is seen rising from Kolkata (23.5-degree N 92-degree E) at 7:00 pm IST, at what time IST will it be seen to rise from Mumbai (19-degree N 72-degree E)?

1. A) 5;40 pm B) 7:00 pm C) 7:20 pm   D) 8:20 pm

 

6) Which of the following physical quantity is useful to determine the purity of an element?

1. A) Mass B) Volume C) Density    D) Weight

 

7) In the polar region in winter the aquatic creatures remain alive under water. For this which mode of transmission occur?

1. A) Conduction B) Radiation C) Convection   D) Above all three

 

8) In which range of age human can hear sound up to 25,000 Hz from the following?

1. A) 1 to 4 years B) 10 to 50 years C) 60 to 90 years    D) 90 to 100 years

 

9) Which of the following pair is not correct?

1. A) Baking soda – Sodium bicarbonate
2. B) Calamine – Zinc Carbonate
3. C) Slaked lime – Calcium hydroxide
4. D) Blue vitriol – Copper sulphate

 

10) Which of the following has three chambered heart?

1. A) Owl B) Shark fish C) Rat    D) Toad

 

11) Which of the following group is improper to make the magnet?

(A) Iron, Cobalt, Nickel

(B) Titanium, Nickel, Iron, Aluminium

(C) Titanium, Bronze, Nickel

(D) Aluminium, Nickel, Cobalt

 

12) A lamp of 100 W was used 4 hours daily in February 2016. Then find out how many units of electricity was consumed in that month

11. A) 11.6 B) 1.16 C) 116    D) 0.116

 

13) Find odd one out according to pH value.

1. A) Vinegar B) Black coffee C) Blood   D) Urine

 

14) The fluorescent tubes and neon sign bulbs glow because of ________

1. A) High density of gases
2. B) High temperature of gases
3. C) High applied voltage
4. D) Presence of charged particles

 

15) Name the gas which turns moist lead acetate solution silvery black.

1. A) SO₂ B) H₂ C) CO₂    D) H₂S

 

16) Who am I? I am clean and pollution – free energy. I provide uninterrupted energy to the space shuttles.

1. A) Solar energy B) Wind energy C) Atomic energy   D) Tidal Energy

 

17) Germs in water can be killed by __________

1. A) Condensation B) Boiling C) Filtration   D) Decantation

 

18) Ban on plastic bags is justified because…

1. P) Ground water table will be improved
2. Q) Air pollution will be restricted
3. R) There will not be water logging during rainy season
4. S) Soil pollution will be reduced
5. A) P & Q B) Q & R C) P & S     D) R & S

 

19) Which of the following stringed instruments are played by using ring of wire in the finger (nakhi)?

1. A) Bulbul B) Extari C) Tambora     D) Sitar

 

20) Which natural phenomenon is responsible to produce ozone gas?

1. A) Water cycle B) Hail storm C) Lightning      D) Earthquake

 

21) Leaf of which plant of the following is a reproductive organ?

1. A) Brahma Kamal B) Cactus C) Sugarcane       D) Aloe vera

 

22) _____________ component of air is formed from coal.

1. A) Sulphur dioxide B) Nitrogen dioxide   C) carbon dioxide   D) Nitrous oxide

23) From where one can see the sun rising from the west?

1. A) Saturn B) Venus C) Mars     D) Mercury

 

24) Select the alternative that has third type of lever

1. A) Betelnut cracker B) Stapler C) Opener   D) Beam balance

 

25) What oil is used in toothpaste?

1. A) Ginger oil B) Clove oil C) Eucalyptus oil   D) Coconut oil

-Team ScienceNow Digital

 

ANSWER

1) B, 2) D, 3) B, 4) A, 5) D, 6) C, 7) C, 8) A, 9) B, 10)  D, 11) C, 12) A,  13) C,

14) D, 15) D, 16) A, 17) B, 18) D, 19) D, 20) C, 21) A, 22) C, 23) A, 24) B, 25) D