Numbers
The Seas
The Oceans
Passages
Bottom Relief
100

 Number of oceans touched by Europe 

 two (the Arctic Ocean & the Atlantic)

100

The Caribbean sea is technically part of this ocean

the Atlantic

100

Every year the Atlantic grows wider by an inch or so, & this largest ocean shrinks

the Pacific Ocean

100

From the Sea of Marmara, go northeast up the Bosporus Strait to reach this bigger sea

the Black Sea

100

Term for the gently sloping sea floor at edge of most land masses

the Continental Shelf

200

The number of oceans that wash up on U.S. shorelines

3

200

This sea forms Pakistan's southern border

 Arabian Sea

200

It's the directional name given to the ocean that surrounds Antarctica

the Southern Ocean

200

Passage which connects the Pacific Ocean to the Arctic Ocean

Bering Strait

200

Portugal's island of Madeira sits at the top of a "shield" one of these, rising up from the floor of the Atlantic Ocean

a volcano

300

Though some call it the Antarctic Ocean, most say these 3 oceans converge around Antarctica

the Atlantic, Pacific & Indian Ocean

300

If you're a Cypriot, you're from an island in this sea

the Mediterranean Sea
300

Ocean you'd cross if you rowed from the Cape of Good Hope to Cape Horn the short way

the (South) Atlantic Ocean

300

When it opened in 1869, it reduced the shipping distance between the United Kingdom & India almost by half

Suez Canal

300

It's a bowl-shaped depression on the ocean floor, or a washbowl or sink in your house

a basin

400

The thermocline, a layer of the ocean from around 660' to 3,000' down, is so-called because this declines rapidly

the temperature

400

The Gulf of Guinea is part of this ocean

the Atlantic

400

This ocean borders the islands of Sumatra & Madagascar

Indian Ocean

400

Named for an English explorer, this passage connects the Atlantic & Pacific Oceans south of South America

Drake Passage

400

Underwater canyons are part of the vast submarine mountain range called the mid-Atlantic this

the Ridge

500

The Kara & Laptev are 2 of the 7 seas of this ocean whose surface temperature hits a high of 29 degrees in July

the Arctic Ocean

500

The only one of Earth's seas without a land boundary, it gets its name from its native surface life

the Sargasso Sea

500

The Ob & other major rivers of Siberia empty into this body of water; Alaska is the only U.S. state to border this ocean

the Arctic Ocean

500

John Moisant made the first flight across this body of water carrying a passenger & his cat, soon renamed Paris-London

the English Channel
500

Examples of this type of steep-sided depression in the sea floor include the Aleutian, Sunda & Mariana

a trench

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