JAMB Geography Past Questions & Answers - Page 28

136.

Where the salinity of an ocean is high;

A.

the ocean water is dense and flows at the ocean surface towards a low salinity area

B.

the ocean water is dense and creeps at the bottom of the ocean towards low salinity areas

C.

the ocean water is light and flows at the area surface towards a high salinity area

D.

the ocean water is light and flows at the ocean surface towards a low salinity area

Correct answer is B

Salinity is one of the causes of ocean currents. Where the salinity of an ocean is high, the ocean water is dense or heavy and creeps(or moves) at the bottom of the ocean to low salinity areas.

137.

On maps, lines drawn to join all places in the ocean having equal degree of salinity are called

A.

isohalines

B.

isobars

C.

isosalines

D.

isossal

Correct answer is A

Isohalines are lines drawn on maps to join all places in the ocean having equal degree of saltiness or concentration of salt or salinity

138.

Which of the following processes leads to the loss of carbon from the air

A.

combustion

B.

combustion

C.

putrifaction

D.

photosynthesis

Correct answer is D

Which of the following processes leads to the loss of carbon from the air

139.

_______ is defined as the total surrounding or medium of any organism in a given area

A.

Biotic component

B.

Abiotic component

C.

Environment

D.

Ecosystem

Correct answer is C

No explanation has been provided for this answer.

140.

In a combined maximum and minimum thermometer, the difference between the hottest and coldest daily temperature for that day gives the

A.

Diurnal range of temperature

B.

Mean daily temperature

C.

Minimum daily temperature

D.

Maximum daily temperature

Correct answer is A

Diurnal range of temperature = Max.temperature - Mini.temperature for that day
Maximum daily temperature ≡ Hottest daily temperature
Minimum daily temperature ≡ Coldest daily temperature