Waec Agricultural Science 1997 Past Questions and Answers

Question 6:

• WAEC 1997

Ice causes rock weathering

A. Through the processes of expansion and contraction
B. Through movement of large rock fragments against large boulders
C. By dissolving some minerals in disintegrated rock fragments
D. By exerting an abrasive action on rock fragments
E. Through chemical alteration of rock minerals

Question 7:

• WAEC 1997

The following are characteristics of quartz except

A. Being granular
B. Having shiny surface
C. Being glass-like
D. Having cleavage
E. Being semi-translucent

Question 8:

• WAEC 1997

The factors which affect the number and the activities of soil micro-organisms include the following except

A. Topography
B. Soil moisture
C. Soil aeration
D. Degree of soil acidity
E. Temperature

Question 9:

• WAEC 1997

Which of the following does not influence rock weathering?

A. Water
B. Carbonation
C. Roots
D. Ammonification
E. Temperature

Question 10:

• WAEC 1997

The amount of air and water in the soil is mostly affected by the

A. Location of the soil
B. Amount of annual rainfall
C. Chemical compostion of the soil
D. Living organisms in the soil
E. Structure of the soil