Question

What is the approximate depth of the abyssal plains where the temperature is never above 4°C?

• A. A. Around 1000 m
• B. B. Around 3000-4000 m
• C. C. Around 6000 m
• D. D. Below 10000 m

Answer 1

Answer:

C. C. Around 6000 m

• The continental slope after some distance forming the continental rise which may be geologically active.

• Continental rise has canyons and trenches which are subject to underwater eruptions and avalanches. The region of the continental slope and rise together comprise the bathyal zone.

• The bathyal zone which is 200 metres deep descends rapidly to a depth of 3,000 or 4,000 m.

• From this the bottom drops for further several thousand metres and levels, off around 6,000 m to form the broad flat abyssal plains where temperature is never above 4°C.