Sci-5 | The Hindu Science Quiz: On Antarctica
This 2020 photograph offered by the British Antarctic Survey exhibits the Thwaites glacier in Antarctica.
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What share of the world’s freshwater is estimated to be locked in Antarctica’s huge ice sheet?
An unbelievable 60-90% of the world’s freshwater is locked in Antarctica’s huge ice sheet.
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Why is Antarctica categorized as a desert?
- As a result of it has no vegetation
- As a result of it has excessive temperatures
- As a result of it receives little or no precipitation
- As a result of it’s lined in ice
The typical annual rainfall on the South Pole over the previous 30 years was simply over 10 mm (0.4 in). The typical throughout the continent is low sufficient to categorise Antarctica as a polar desert.
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What’s the phenomenon often known as “Blood Falls” attributable to?
- A species of purple algae
- Purple mineral deposits on the ice floor
- Volcanic exercise below the glacier
- Salt and oxidized iron in subglacial water
The water flowing from inside the glacier was from a subglacial lake excessive in salt and oxidised iron, and when it got here into contact with oxygen the iron rusted, giving the water its hanging purple shade, and its title: Blood Falls.
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Why can’t snakes survive in Antarctica?
- Everlasting frozen floor and lack of exterior warmth
- Lack of meals sources
- Predation by different animals
- Low oxygen ranges
Reptiles depend on exterior warmth sources to assist regulate their physique temperature – one thing that’s in very quick provide within the frigid local weather of Antarctica.
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How lengthy is the Transantarctic Mountain vary?
- 2,000 km
- 3,500 km
- 1,500 km
- 4,000 km
The Transantarctic Mountains run for greater than 3,500km, making them one of many longest mountain ranges on the planet.
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Printed – December 05, 2024 05:30 pm IST
