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Hydrosphere — Oceans, Tides and Currents - Short Trick

Oceans, trenches, salinity, tides, currents and straits — one sentence each

2 trick sentences3 pairs6 parts
0 / 3 learned · 0%
How to read
  • Guru Ram Each coloured word = one name in the list, shown below in the same colour
  • Panda Two colours in one word = two names
  • ➜ Order the numbered order matters · ⇄ Any order no order
1

Oceans and Trenches

The four oceans by size, the deepest point of each ocean and the five deepest Pacific trenches.

Trick 1

The four oceans — area

➜ largest to smallest

Paul sent Atul Indu’s art.

  1. 1Pacific45.77% of area · 51.63% of volume
  2. 2Atlantic22.83%
  3. 3Indian20.34%
  4. 4Arctic3.91%

Water covers 70.8% of the Earth’s surface, land 29.2% · about 97% of all water is in the oceans · in June 2021 National Geographic recognised the waters around Antarctica, out to 60° S, as the fifth “Southern Ocean”; the IHO list still names four.

Pairs

Deepest point of each ocean

3 sentences

Paul loves Mary deeply.

Pacific=Challenger Deep in the Mariana Trench — about 10,935 m, the deepest point on Earth

Atul fries puris in a deep pan.

Atlantic=Puerto Rico Trench — about 8,376 m

Indu sings a deep song every Sunday.

Indian=Sunda (Java) Trench — about 7,190 m

The Diamantina Deep lies south-west of Australia in the Indian Ocean · other Atlantic trenches — South Sandwich and Romanche.

Trick 2

The five deepest Pacific trenches

➜ deepest first

Mary took Kumar’s photo by the kettle.

  1. 1Mariana (Challenger Deep)about 10,935 m
  2. 2Tonga (Horizon Deep)10,882
  3. 3Kuril–Kamchatka10,540
  4. 4Philippine10,540
  5. 5Kermadec10,047

Kuril–Kamchatka and Philippine are equally deep (about 10,540 m) · next come the Aleutian (8,109) and Peru–Chile/Atacama (8,065) · most trenches lie beside the island arcs on the Pacific rim.

2

Marginal Seas, Islands and Salinity

The seas on the Pacific’s western edge, its island groups, the Indian Ocean’s seas, and the saltiest and least salty seas.

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3

Tides and Tidal Power

When spring and neap tides come, which country each tidal power station is in, and India’s best sites.

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4

Ocean Currents

The cold currents of each ocean, the fishing grounds where warm and cold currents meet, the Sargasso Sea, El Niño and La Niña.

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5

Straits of the World

The five chokepoints of trade, the route from the Black Sea to the Aegean, and which two lands each big strait lies between.

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6

Coastlines and Maritime Zones

Where each kind of drowned coast is found, and a country’s zones of control out to sea.

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Read the full chapter for the complete notes — a trick helps you remember the list; understanding comes from the notes.