Category Electricty

What is Sci-fi?

A member of the Reading Club casually remarked about sci-fi and elaborated, “Science fiction is abbreviated as sci-fi or at times, SF, and this genre yokes the two contradictory disciplines together. As we know, fiction is fictitious and science stands for rationality. But some novelists have succeeded in bringing them together. This popular genre transports readers to a future hinging on the concepts such as time travel, space exploration, aliens, parallel universes, and so on, and, to our amazement, some of them are turning out to be real now.” His explanation aroused our interest in reading and discussing H.G. Wells’ ‘The Time Machine’ in the following meeting.

Four of us participated in a group sharing. Each one focussed on an aspect, and the following are some of our key ideas.

Popularity of sci-fi

Although the origin of science fiction can be traced back to the previous centuries, its golden age is the 1940s and 1950s. These were the decades of significant scientific discoveries, namely space exploration and nuclear energy, which the novelists subsumed in their imagination. As is the case with all genres of fiction, sci-fi too has all the elements such as setting, characters. plot development, theme, climax, and point of view. What makes it unique is all these elements are heavily dependent on scientific facts, theories, and principles hinged on an imaginative story.

Sci-fi movies

Sci-fi movies also have become very popular in the last few decades. It is rare to come across anyone who has not watched or heard of films such as ‘Avatar’, ‘Jurassic Park’, ‘Star Wars’, ‘Alien’, ‘The Matrix’, and so on. They also share the same features as the novels, and, in fact, most of them are based on them.

As many as 23 novels and stories of H.G. Wells alone have been made into films, including The Time Machine. These are immensely popular with moviegoers as they are full of action, adventure, and twists and turns, gripping them.

H.G. Wells

H.G. Wells, the “Father of Science Fiction”, was born in Kent, England, in 1866 and died in 1946. He was the son of domestic helpers, and because of his inexhaustible love for reading, he rose to become one of the most influential British authors. He was a prolific writer, equally known for fiction and non-fiction works, which not many have managed to achieve. He wrote more than 50 novels, dozens of short stories, and many non-fiction, including in the areas of politics, history, and social commentary. But he is more known for his sci-fi novels.

The Time Machine

The novel is about a time traveller who builds a machine and travels to a distant future – the year 8,02,700 A.D., and narrates his experiences at ‘the world of the remote future’ to a group of his friends. It is worth sharing the traveller’s initial encounter with the people/creatures living there:

“He (Eloi) was a slight creature-perhaps four feet high… they looked so frail that I could fancy myself flinging the whole dozens of them about like nine-pins… one of them asked me a question that showed him to be on the intellectual level of one of our five-year-old children…”

“A flow of disappointment rushed across my mind. For a moment I felt that I had built the Time Machine in vain.”

The time traveller elaborately describes the two races of humanity occupying the landscape-child-like Eloi and monstrous Morlocks. Eloi are small, unintelligent, weak but kind and happy people but Morlocks are the labourers forced to live underground working for the overlanders. The traveller has varied experiences with them and finally manages to locate his stolen machine and escapes from the dark world. What initially appears like a utopia turns out to be a dystopia to him.

 The story ends with an unnamed narrator informing us about another trip of the time traveller to reach the end of Earth’s existence and bring back proof of his adventure. But three years have elapsed, and the narrator If wonders whether the traveller is still wandering in time or has perished.

‘The Time Machine’, Wells’ first novel, brought him immediate fame, and till today, has been regarded as a masterpiece of science fiction.

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U.K. LAUNCHES NEW COURSE TO TEACH STUDENTS HOW TO SAVE THE PLANET.

The U.K. will offer a new GCSE (General Certificate for Secondary Education) from September 2025 that will “offer young people a chance to develop a deeper knowledge and understanding of this amazing planet, its environment and how to conserve it,” said education secretary Nadhim Zahawi.

The qualification will allow students to learn about organisms and their environments, as well as environmental and sustainability issues. Students will also develop skills for future careers in conservation, “from understanding how to conserve local wildlife to conducting the fieldwork needed to identify species”

Students learn about environmental issues already; this course will teach them about the history and evolution of species and the impact of life on natural environments.

Teen conservationist and wildlife writer Kabir Kaul, 15, said the course “will give my generation the knowledge and practical skills they need to value and protect the environment around them”.

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DO BACTERIA AND FUNGI SPEED UP WEATHERING?

When water collects in the cracks of a rock, it can freeze when temperatures drop. The ice expands and the pressure can split the rock. In cold, mountain regions, one can even hear gunshot-like cracks as rocks are split apart by frost.

A mechanical process, freeze-thaw weathering causes the ?joints?(cracks) in rocks to expand, which wedges parts of rocks apart. Because water expands by about 10% when it freezes, this creates outward pressure in rock joints, making the cracks larger.

Joints occur naturally in rocks as a result of their formation. Fractures that are not offset, joints do allow for the entry of water into rocks.

In climates where temperatures dip below freezing in the winter, moisture in the joints of rocks solidifies as ice. Over time, after several cycles of freezing and thawing, joints get large enough that bit of rock start to fall off in smaller pieces. This breakdown of rock happens faster at higher altitudes, where many freeze-thaw cycles can occur during the year.

Credit: Sciencing

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HOW DOES FROST BREAK UP ROCKS?

When water collects in the cracks of a rock, it can freeze when temperatures drop. The ice expands and the pressure can split the rock. In cold, mountain regions, one can even hear gunshot-like cracks as rocks are split apart by frost.

A mechanical process, freeze-thaw weathering causes the joints? (cracks) in rocks to expand, which wedges parts of rocks apart. Because water expands by about 10% when it freezes, this creates outward pressure in rock joints, making the cracks larger.

Joints occur naturally in rocks as a result of their formation. Fractures that are not offset, joints do allow for the entry of water into rocks.

In climates where temperatures dip below freezing in the winter, moisture in the joints of rocks solidifies as ice. Over time, after several cycles of freezing and thawing, joints get large enough that bit of rock start to fall off in smaller pieces. This breakdown of rock happens faster at higher altitudes, where many freeze-thaw cycles can occur during the year.

Credit: Sciencing

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WHAT IS THE DIFFERENCE BETWEEN PHYSICAL AND CHEMICAL WEATHERING?

Physical weathering is also known as mechanical weathering. It is a process, initiated by humans, plants or animals, which breaks down rocks and minerals on the surface of Earth. It changes just the shape or size of the rocks and minerals. Chemical weathering, on the other hand, happens when the chemical composition of the rock and soil changes, forming new chemical combinations and a different internal structure.

Physical weathering is also called as mechanical weathering. This is the process where rocks breakdown without altering their chemical composition. Physical weathering can occur due to temperature, pressure or snow. There are two main types of physical weathering. They are freeze thaw and exfoliation.

Freeze-thaw is the process where water goes into the cracks of the rock, then freezes and expands. This expansion causes rock to break apart. Changing temperature also causes rocks to expand and contract. When this happens over a period of time, rock parts starts to break down. Due to the pressure, cracks can be developed parallel to the land surface which leads to exfoliation.

Physical weathering is prominent in the places where there is little soil and few plants. For example, in desserts surface rocks are subjected to regular expansion and contraction due to temperature changes. Also, in mountain tops, snow keeps melting and freezing which causes physical weathering there.

Chemical weathering is the decomposition of rocks due to chemical reactions. This changes the composition of the rock. This often takes place when rain water reacts with minerals and rocks. Rain water is slightly acidic (due to dissolution of atmospheric carbon dioxide, carbonic acid is produced), and when the acidity increases chemical weathering also increases. With the global pollution, acid rains occur now, and this increases chemical weathering more than the natural rate.

Other than water, temperature is also important for chemical weathering. When the temperature is high, the weathering process is also high. This releases minerals and ions in rocks into surface waters. There are three main types as to how the chemical weathering occurs. They are solution, hydrolysis and oxidation. Solution is the removal of rock in solution due to acidic rain water. This is sometimes called carbonation process, since the rain water acidity is due to carbon dioxide. Hydrolysis is the breakdown of rock to produce clay and soluble salts by acidic water. Oxidation is the breakdown of rock due to oxygen and water.

Credit: differencebetween.com

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CAN TREES CAUSE WEATHERING?

Yes, trees can break up large rocks. Seeds may be deposited in the cracks and gaps of rock clusters and they germinate there. As the plant grows, the roots crack the rock further and may even break it into many pieces.

Plants can cause mechanical and chemical weathering. When plants cause mechanical weathering, their roots grow into rocks and crack them.It can also happen in streets or sidewalks. When plants cause chemical weathering, there roots release acid or other chemicals, onto rocks, which then forms cracks, and breaks apart.

Plants can cause physical weathering as their roots grow. Seeds of plants or trees can grow inside rock cracks where soil has collected. The roots then put pressure on the cracks, making them wider and eventually splitting the rock. Even small plants can cause this kind of weathering over time.

Biological Weathering – This type of weathering is caused by plants and animals. The plants and animals have acids inside them and when they release their acid it converts into chemicals that further results in weathering and breaking down of rocks and minerals and other types of landforms.

Credit: SidmartinBio

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