Q 01/05

The Mariana Trench lies in which ocean?

A) Pacific

B) Indian

C) Atlantic

D) Southern

Answer · why

A) Pacific

It sits about 200 km east of the Mariana Islands in the western part of the ocean.

Q 02/05

The Challenger Deep, the trench's deepest point, is a small slot-shaped valley at which end?

A) Northern

B) Western

C) Southern

D) Eastern

Answer · why

C) Southern

It lies about 10,935 metres down, some 300 km south-west of Guam.

Q 03/05

The bottom of the trench is more than 2 km farther from sea level than the summit of which mountain?

A) Kangchenjunga

B) Mount McKinley

C) Mount Kilimanjaro

D) Mount Everest

Answer · why

D) Mount Everest

If Everest were dropped into the trench, its peak would still be more than a mile underwater.

Q 04/05

Roughly how long is the crescent-shaped Mariana Trench?

A) 250 km

B) 2,550 km

C) 1,200 km

D) 800 km

Answer · why

B) 2,550 km

It averages about 69 km wide.

Q 05/05

The pressure at the bottom of the trench is roughly how many times atmospheric pressure at sea level?

A) About 100

B) About 50

C) About 10,000

D) About 1,000

Answer · why

D) About 1,000

That is 1,086 bar, or about eight tons per square inch.