Unseen Passage for Class 6 - Passage 03

Posted by Olympiad Tester on


The discovery of the ancient city of Atlantis has long been a topic of fascination and debate among historians, archaeologists, and enthusiasts. According to the accounts of the ancient Greek philosopher Plato, Atlantis was a powerful and advanced civilization that existed around 9,000 years before his time.

Plato described Atlantis as a utopian society with grand architecture, advanced technology, and a prosperous economy. However, he also mentioned that the city's inhabitants became morally corrupt and engaged in war, ultimately leading to the city's catastrophic downfall. Despite the detailed narrative, the exact location of Atlantis remains a mystery, with various theories and speculations.

Some believe that Atlantis was a fictional allegory created by Plato to convey philosophical ideas, while others insist on its historical existence. Over the years, countless expeditions and research efforts have been conducted to find evidence of Atlantis, but none have provided conclusive proof. The legend of Atlantis continues to captivate the imagination, sparking ongoing quests to unravel the truth behind this enigmatic city.

Q1) According to Plato, how advanced was the civilization of Atlantis?

A. Moderately advanced

B. Simple and primitive

C. Extremely advanced

D. Non-existent

Answer: C. Extremely advanced

Q2) What factor contributed to the downfall of Atlantis, according to Plato?

A. Lack of resources

B. Moral corruption and war

C. Natural disasters

D. Invasion by neighboring civilizations

Answer: B. Moral corruption and war

Q3) What is the main mystery surrounding Atlantis?

A. Its grand architecture

B. Its advanced technology

C. Its exact location

D. Its prosperous economy

Answer: C. Its exact location

Q4) What is one theory about Atlantis?

A. It never existed

B. It was located in Asia

C. It was a fictional allegory

D. It was discovered in modern times

Answer: C. It was a fictional allegory

Q5) What has been the result of expeditions to find Atlantis?

A. Conclusive proof of its existence

B. Evidence supporting its historical accounts

C. Ongoing mystery and no conclusive proof

D. Its exact location revealed

Answer: C. Ongoing mystery and no conclusive proof

The fascinating world of bioluminescence is a captivating natural phenomenon found in various organisms. Bioluminescent organisms, such as fireflies, jellyfish, and certain fungi, produce light through a chemical reaction. This unique ability serves various purposes, including attracting mates, deterring predators, and luring prey.

One remarkable example of bioluminescence is found in the deep ocean where many marine organisms produce their own light. The anglerfish, for instance, uses a bioluminescent lure to attract prey in the darkness of the deep sea. The light is emitted from specialized organs and is created by the combination of luciferin and oxygen with the help of an enzyme called luciferase.

Scientists are actively studying bioluminescence for its potential applications in medical research and environmental monitoring. The understanding of the mechanisms behind this natural glow may lead to advancements in areas such as cancer detection and the development of new imaging technologies.

Q1) What is bioluminescence?

A. A type of plant

B. A natural phenomenon producing light

C. A chemical reaction in the air

D. A type of deep-sea creature

Answer: B. A natural phenomenon producing light

Q2) What is one purpose of bioluminescence in marine organisms?

A. Attracting mates

B. Deterring predators

C. Luring prey

D. All of the above

Answer: D. All of the above

Q3) How does the anglerfish use bioluminescence?

A. To produce its own food

B. To attract mates

C. To attract prey in the deep sea

D. To scare away predators

Answer: C. To attract prey in the deep sea

Q4) What is the chemical reaction involved in bioluminescence?

A. Oxygen and nitrogen

B. Carbon dioxide and water

C. Luciferin and oxygen

D. Chlorophyll and sunlight

Answer: C. Luciferin and oxygen

Q5) How might the study of bioluminescence contribute to medical research?

A. By creating new plant species

B. By developing new imaging technologies

C. By discovering new species of fish

D. By understanding weather patterns

Answer: B. By developing new imaging technologies


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