Human blood is a testament to life’s origin in the OCEAN: its chemical composition is nearly identical to that of sea-water
CRUST
tour the ocean.
ऋषि उवाच
1. ok
2. कोणे नता पृथ्वी मुख्य कारणं । सूर्यात दूरी समुद्रः च गौण।
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MANTLE
Have
To understand in detail
For Learners:
DIYHA (do it yourself home activity):
LEARNINGS FROM
Do you know
1. The immortal Jelly Fish
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3. How do Elephant seals dive down upto 2 km?
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4. Can the antifreeze protein in the Patagonian toothfish save humans from frostbite?
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5. How does Megamouth Shark survive hypoxia and frostbite at a depth of 4.5 km under the sea?
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LEADING ARTICLES
Do you know
1. Only 1/5th of the Ocean floor mapped by humans so far
When the Nippon Foundation-GEBCO Seabed 2030 Project was launched in 2017, only 6% of the global ocean bottom had been surveyed to what might be called modern standards.
That number now stands at 19%, up from 15% in just the last year. Some 14.5 million sq km of new bathymetric (depth) data was included in the GEBCO grid in 2019 – an area equivalent to almost twice that of Australia.
2. Lunar
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3. GEBCO-NF Alumni robots win ocean-mapping XPRIZE
A robotic boat and submersible have won the XPRIZE to find the best new technologies to map the seafloor.
The surface and underwater combo demonstrated their capabilities in a timed test in the Mediterranean, surveying depths down to 4km.
Put together by the international GEBCO-NF Alumni team, the autonomous duo are likely now to play a role in meeting the “Seabed 2030” challenge.
This aims to have Earth’s ocean floor fully mapped to a high standard.
4. Antarctica’s A-68: Is the world’s biggest iceberg about to break up?
The world’s biggest iceberg, A-68, just got a little smaller.
At around 5,100 sq km, the behemoth has been the largest free-floating block of ice in Antarctica since it broke away from the continent in July 2017.
But on Thursday, it dropped a sizeable chunk measuring about 175 sq km.
The iceberg is currently moving north from the Antarctic Peninsula. Having entered rougher, warmer waters – it is now riding currents that should take it towards the South Atlantic.
Prof Adrian Luckman, who’s been following A-68’s progress, said the new fracture could mark the beginning of the end of this icy giant.
QUIZ
Each of the following questions has four answer options: a, b, c, d. Choose the correct one.
1. If you are situated anywhere at the Tropic of Cancer then your shadow can never point in this direction:
(a) North
(b) East
(c) South
(d) West
2. Consider the