The Greenhouse Effect

What is the greenhouse effect?

The gases will surround the earth-water vapour, carbon dioxide, methane and others allow the sun’s heat to come in but they don’t let the heat out again easily. This is called the greenhouse effect.

Why the name?

Because a similar thing happens in a greenhouse where plants which require protection from the weather are grown. The only difference is that in a greenhouse it is the glass roof that prevents the heat from escaping.

Is the greenhouse effect beneficial to earth?

It is for the greenhouse effect, a lot of heat would escape from the earth into space and temperatures could come down before freezing point.

Why is the greenhouse effect hurting us?

The percentage of greenhouse gases especially methane and carbon dioxide- has been steadily increasing. They are trapping more heat in the atmosphere than necessary.

Greenhouse Effect on Earth

Source-“The Greenhouse Effect” in: “Introduction,” in: US EPA (December 2012) Climate Change Indicators in the United States, 2nd edition[1], Washington, DC, USA: US EPA, p.3. EPA 430-R-12-0

Is the earth becoming hotter?

Yes, earth’s temperature has increased slightly. But even that is significant and the effects of global warming are already visible.

Do you know?

In Alaska, global warming is having a reverse effect. As the glaciers in Alaska, melt, the land which was buried under them is rising rapidly, causing the sea to retreat.

Where will you find the Jedi and the Sith?

In the Star Wars universe! Star Wars is a sci-fi film series created by George Lucas, an American film producer. It is set in a fictional galaxy bound by an omnipresent energy called Force. Its power can be used to perform superhuman feats like telekinesis and mind control.

Jedi and Sith

Jedi or Sith? by Goatcookie

The Jedi and the Sith are two enemy groups who can harness the power of the Force for good or evil. The Jedi use the light side of the Force for good, peaceful and just purposes. On the other hand, the villainous Sith use the dark side of the Force to gain immense powers so they can control the galaxy. Both use a signature weapon called the lightsaber, as ‘laser sword’.

Jedi or Sith

Image courtesy-iKwiz

Grand Master Yoda, Master Obi- Wan Kenobi and Luke Skywalker are some of the prominent Jedi Knights. The most ominous of the Siths are Dark Sidious, who later becomes Emperor Palpatine of the Galactic Empire and his pupil, Darth Vader (former Jedi knight, Anakin Skywalker).

Cuban Revolutionary

Cuba’s revolutionary leader, Fidel Castro, breathed his last on November 25, aged 90.

Fidel Castro

The Cuban leader Fidel Castro. Photo: Antonio Milena – ABr Creative Commons 2.0 Brasil

When and where was he born?

Fidel Castro was born on August 13, 1926, in southeast Cuba. He excelled in sports in school. A born rebel, he joined student politics while studying law at the University of Havana. He was influenced by the ideas of Karl Marx and wanted to end the inequality between poor laborers and rich sugar barons.

How did he come to power?

Along with the Argentine revolutionary, Che Guevara, Castro launched guerilla attacks against the government in 1957-58. On January 1, 1959, his troops ousted the dictator General Fulgencio Batista who fled Cuba. He became the Prime Minister and established the first communist state in the Western Hemisphere.

How did Castro do as head of state?

As soon as he came to power, Castro implemented radical policies. He introduced free education and healthcare and built roads and houses for the Cuban people. He instituted sweeping land reforms and nationalized commerce and industry.

On the other hand, he severely repressed freedom of the press, free speech, and political opponents. While he eased the life of workers and farmers, he alienated the upper and middle educated classes who immigrated to the USA in droves.

Why did Cuba’s relations sour with the USA?

Castro captured the imagination of the people as a fiery lone ranger in military uniform defying the might of USA. He allied himself with USSR, USA’s enemy in the Cold War. When US oil companies refused to process Soviet oil in their refineries, Castro retaliated by taking over US-owned sugar plantations, banks, and factories. Angered by the move, USA imposed and economic embargo and broke all diplomatic ties with Cuba in 1961.

Over the next decades, Castro continued to be a thorn in USA’s side, sponsoring revolutionary movements in Latin America and Africa.

When did Castro resign from power?

He formally resigned in 2008, ceding power to his brother Raul. He was in power for 49 years- he was the longest non-royal ruler.

 

What is the Tower of Hanoi?

The Tower of Hanoi is a mathematical puzzle, invented by French Mathematician Edouard Lucas in 1983.

Object of the game:

There are three rods or towers, and on the first rod or tower is a stack of discs of different sizes arranged in the decreasing order of size from bottom to top. The object of the game is to move all of the discs to the third rod and arrange them in the same order. However, only one disc can be moved at a time, and a larger disc cannot be placed on top of a smaller disc.

Tower of Hanoi, mathematical puzzle.

Tower of Hanoi

How to play:

If you have 3 discs, a  total of 7 moves will be required.

Move 1:  Move the topmost disc from rod A to rod C

Move 2:  Move the second disc from rod A to rod B

Move 3:  Move the disc from rod C to rod B.

Move 4:  Move the last disc from rod A to rod C.

Move 5:  Move the top disc from rod B to rod A.

Move 6:  Move the remaining disc from rod B to rod C.

Move 7:  Move the disc from rod A to rod C.

The number of moves increases the number of discs. For eg. with 4 discs, a total of 15 moves will be required.

Applications: The game is frequently used in psychological research and teaching recursive algorithms in computer programming.

Riddler-Batman- Quiz-#lifestyle

Crack this!

A boy wants to cross a river from south to north: he can’t swim, there aren’t any boats available, and the only bridge across the river is watched over by a guard who comes out of his hut every five minutes. It is impossible to cross the bridge in less than 10 minutes. How do you think the boy will cross the river?

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A.  He walked across from south to north. As the guard emerged from his hut, the boy turned around and pretended he was walking from north to south. The guard then ran after him and shooed the back the way he though he had come- that is the north side of the river.

 

Trivia- Whiz Quiz- #Lifestyle

Trivia

Here is a trivia to brush up your knowledge-

Q 1.  Who administers oath of office to the President of India?

 

Q.2 Rudyard Kipling based his ‘Jungle Book’ on a national park in India. Name the park.

 

Q3. Which is India’s second permanent research station in Antartica called?

 

Q4. Which is the longest urban beach in India?

 

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A1.  Chief Justice of India

A2.  Kanha National Park

A3.  Maitri

A4.  Marina Beach, Chennai

 

trivia, science

Trivia

True or false

Astronauts in space shuttles use ‘no-rinse’ shampoo to wash their hair.

Astronaut, trivia, science

Astronaut

True. Water and soap stick to the skin in a state of weightlessness. Therefore, instead of normal shampoos that require water, astronauts use no-rinse shampoos. These shampoos, when massaged on to the head, give a good lather; which is then wiped off by using a towel.