महासागरीय धाराएँ, प्रवाल भित्तियाँ एवं विश्व के 7 महाद्वीप
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15 mins
Time
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10
Questions
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1
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महासागरीय धाराएँ, प्रवाल भित्तियाँ एवं विश्व के 7 महाद्वीप — Questions with Answers
Open after you finish the quiz — all 10 questions,
with answers and explanations.
Q1.
Which type of ocean currents flow from the equator towards the poles?
Cold currents
Warm currents
Deep currents
Tidal currents
Show answer
Answer: B. Warm currents
Ocean currents that flow from the equator towards the poles are warm currents. These currents carry warm water from tropical regions to higher latitudes and increase the temperature of the regions they pass through.
Q2.
El Niño phenomenon is associated with which ocean?
Atlantic Ocean
Indian Ocean
Pacific Ocean
Arctic Ocean
Show answer
Answer: C. Pacific Ocean
El Niño is a climate phenomenon that occurs in the Pacific Ocean. It involves the warming of sea surface temperatures in the central and eastern tropical Pacific Ocean, which affects weather patterns globally.
Q3.
Which of the following is the world's largest coral reef system?
Red Sea Coral Reef
Caribbean Reef
Great Barrier Reef
Maldives Coral Reef
Show answer
Answer: C. Great Barrier Reef
The Great Barrier Reef, located off the coast of Australia, is the world's largest coral reef system. It stretches over 2,300 kilometers and is visible from space.
Q4.
How many continents are there in the world?
5
6
7
8
Show answer
Answer: C. 7
There are 7 continents in the world: Asia, Africa, North America, South America, Antarctica, Europe, and Australia/Oceania.
Q5.
Which is the largest continent in the world?
Africa
Asia
North America
South America
Show answer
Answer: B. Asia
Asia is the largest continent in the world, covering about 30% of Earth's total land area and containing about 60% of the world's population.
Q6.
Coral reefs are primarily formed by which type of marine organisms?
Fish
Seaweed
Coral polyps
Crustaceans
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Answer: C. Coral polyps
Coral reefs are primarily formed by coral polyps, which are small marine animals that secrete calcium carbonate to form their hard skeletons, creating the reef structure over time.
Q7.
Which continent is known as the 'Dark Continent'?
Asia
Africa
South America
Australia
Show answer
Answer: B. Africa
Africa is historically known as the 'Dark Continent' due to the limited knowledge Europeans had about its interior regions during the colonial period.
Q8.
The Gulf Stream is an example of which type of ocean current?
Cold current
Warm current
Deep current
Circular current
Show answer
Answer: B. Warm current
The Gulf Stream is a warm ocean current that originates in the Gulf of Mexico and flows northward along the eastern coast of the United States, bringing warm water to higher latitudes.
Q9.
Which continent has no permanent human population?
Australia
Europe
Antarctica
North America
Show answer
Answer: C. Antarctica
Antarctica has no permanent human population due to its extremely harsh climate conditions. Only research scientists stay there temporarily at research stations.
Q10.
In which temperature range do coral reefs typically thrive?
10-15°C
20-25°C
25-30°C
30-35°C
Show answer
Answer: C. 25-30°C
Coral reefs typically thrive in warm tropical waters with temperatures between 25-30°C. They require warm, clear, and shallow waters with adequate sunlight for photosynthesis.
