16.

The most important force that provide resistance to particles towards entertainment is
A. frictional resistance B. particle cohesive bonds
C. particle adhesive bonds D. momentum
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.
17.

The metamorphism which involves the chemical replacement of elements in rock minerals when gases and liquids permute into bedrock is called
A. metasomatic metamorphism B. dynamic metamorphism
C. thermal metamorphism D. contact metamorphism
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.
18.

The magnetosphere becomes unstable during the magnetic storms during a period of
A. initial phase B. storm sudden commencement phase
C. main phase D. None of the above
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
19.

The major cause of species extinction is
A. agricultural activities B. extraction (including mining, fishing, logging)
C. development (human settlements, industry) D. habitat loss and degradation
Answer and Explanation
Answer:D
Explanation: No answer description available for this question.
20.

The major crops found in Sudan are
A. rice, barley, bananas, cocoa B. maize, cotton, bananas, groundnut
C. bajra, oats, tobacco D. wool, wine, jute
Answer and Explanation
Answer:B
Explanation: No answer description available for this question.