History

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What was the Berlin Wall?

The Berlin Wall (German: Berliner Mauer) was a barrier that divided Berlin from 1961 to 1989.[1]Constructed by the German Democratic Republic (GDR, East Germany), starting on 13 August 1961, the Wall completely cut off (by land) West Berlin from surrounding East Germany and fromEast Berlin until government officials opened it in November 1989.[2] Its demolition officially began on 13 June 1990 and was completed in 1992.[3] The barrier included guard towers placed along large concrete walls,[4] which circumscribed a wide area (later known as the “death strip”) that contained anti-vehicle trenches, “fakir beds” and other defenses. The Eastern Bloc claimed that the Wall was erected to protect its population from fascist elements conspiring to prevent the “will of the people” in building a socialist state in East Germany. In practice, the Wall served to prevent the massive emigration and defection that had marked East Germany and the communist Eastern Bloc during the post-World War II period.

The Berlin Wall was officially referred to as the “Anti-Fascist Protective Wall” (German:Antifaschistischer Schutzwall) by GDR authorities, implying that the NATO countries and West Germany in particular were considered equal to “fascists[5] by GDR propaganda. The West Berlin city government sometimes referred to it as the “Wall of Shame“—a term coined by mayor Willy Brandt—while condemning the Wall’s restriction on freedom of movement. Along with the separate and much longer Inner German border (IGB), which demarcated the border between East andWest Germany, it came to symbolize the “Iron Curtain” that separated Western Europe and theEastern Bloc during the Cold War.

https://en.wikipedia.org/wiki/Berlin_Wall

Nature

Which Scientists study nature?

Nature is a subject that involves many different types of scientist. Zoologist study animals and botanists study plants. There are many other subdivisions within these individual subjects. Palaeontologist for example, study extinct creatures, whereas biologist study living thing.

Types of Scientist              The study of

Antropologist                      Human beings and their way of life

Bacteriologist                      Bacteria

Biologist                                Living things

Botanist                                 Plants

Ecologist                                living things and their environment

Marine Biologist                  Life in and around the sea

Ornithologist                        Birds

Palaentologist                      Fossils

Physiologist                          The functions of living things and their plants

Zooligist                                 Animals

How do cuttlefish and squid ‘talk’ to each other?

Cuttlefish and squid have a visual language in which they communicate by changing their body colour and patterns. This change happens extremely quickly. waves of colour and complicated pattern pass over the animal’s body when it is frightened or hungry, or trying to escape from danger.

Quetzalcoatlus had a wing span pf greater than 15m, which is larger than that of may light planes.

Science

science

http://statedclearly.com/assets/img/about/Science.png”

How fast does the light travel?

The speed of light is the fastest speed known- light travels through the vacuum of space at 300,000 km per second. Nothing else can travel at this speed, and the theory of relavity, conceived by Albert Einstein, says that nothing can even approach this speed. This means that travel to the stars will not be possible, because it would take hundreds of years to reach them.

How can light travel along a cable?

Although light travels only in straight lines, it can be made to bend around curves and angles using optical fibres. These are bundles of very thin strands of exceptionally clear glass. The fibres are treated so that their outer surface reflects light. When light is shone in one end of the bundle it passes along the fibres, reflecting from the sides as they curve and eventually emerging at the far end.

Optical ffibres carry electronic signals to computers, and they are increasingly used in telephone lines. Optical fibres are very useful in medicine to diagnose disease. A flexible fibreoptic probe can be inserted into the body to view the internal workings of an organ.

What are magnets made of?

Permanent magnets are usually made from mixtures of iron, cobalt and nickel, but others contain far more complicated mixtures of metals. Magnetite is a natural magnetic substance, which used to be called lodestone. It is a material that contains iron, and it was originally used to make the first primitive compasses.

all credits to Ms. Belinda Gallagher(except the photo)

 

Earth and Space

images-of-earth-in-space
http://creativestockphoto.com/wp-content/uploads/2014/09/images-of-earth-in-space.jpg” 
Author: Belinda Gallagher 
Book Title: Encyclopedia of questions and answers 
What is the Universe made of?
According to the book of Ms. Belinda Gallagher

“The Universe is made up almost entirely of hydrogen and helium. these are the two lightest elements. all the rest of the matter in the universe is very rare. elements such as silicon, carbon and others are concentrated into clouds, stars and planets. the universe is held together by four invisible forces. Gravity and electromagnetism are the two familiar forces. The other two kinds are strong and weak nuclear forces. These operate only inside the incredibly tiny nucleus of atoms, holding the tiny particles together.”

How Old is the Universe?

“It is possible to calculate the approximate age of the Universe by looking at how fast the distant galaxies are moving away from us. However, it is not possible for us to make this calculation accurately. Scientist have estimated that the Universe is between 13,000 and 18,000 million years old.”

What was the Big Bang?

“The Big Bang is the most popular theory about the creation of the universe. According to it, the whole Universe was created in a split second in one huge explosion. All matter was squeezed together into a tiny, super-hot, dense ball that was smaller than an atom. The ball gradually expanded as it cooled, Then exploded, releasing energy and matter in all directions. We cannot see the Big Bang because it would have happened billions of years ago. But we can see that the Universe is growing steadily bigger. All galaxies are speeding away from each other as the Universe Expands”

 

Why is the Earth round?

Gravity pulled the earth and the other planets into a sphere when they were being formed. The Earth is not truly round, but is slightly flattened making it bulge out at the equator. This effect is due to the speed with which the Earth spins, causing the Equator to try to fly out from the Axis of the spinning Earth. It is rather like a heavy object whirling round on the end of a piece of string. The shape of some of the other planets is Distorted in the same way.

all credits to Ms. Belinda Gallagher(except the photo)

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