Waec Geography 1991 Past Questions and Answers

Question 16:

• WAEC 1991

The isoberlina tree is characteristic of the

A. Sudan savanna
B. Sahel savanna
C. High forest
D. Fesh water swamp
E. Guinea savanna

Question 17:

• WAEC 1991

The environmental lapse rate is best described as

A. A decrease in air temperature by 0. 65 ⁰C per 1000m of ascent in the atmosphere
B. The rate of temperature changes within the stratosphere
C. A fall in air temperature by 6.5^{0100m of ascent in the stratoshere>}
D. A decrease of air temperature by 6.5^{0per 1000m of ascent in the troposphere>}
E. A fall in air temperature by 0.6^{0per 100m of ascent in the atmosphere>}

Question 18:

• WAEC 1991

Water pollution is caused by all the following except

A. Increased silt load
B. Sand filling
C. Sewage disposal
D. Industrial effluent
E. Mineral workings

Question 19:

• WAEC 1991

Which of the factors least affects distribution of vegetation?

A. Man
B. Rainfaill
C. Wind
D. Soil
E. Temperature

Question 20:

• WAEC 1991

Which of the following environmental hazards has been paired with the wrong factor?

A. Coastal erosion and wave action
B. Drought and climate
C. Floods and human factor only
D. Deforestation and human factor only
E. Soil erosion and physical/human factors