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1. The pedogenic process associated with poor drainage and which involves the accumulation of organic matter in the upper layers of the soil is called

A. Salinization
B. Gleisation
C. Calcification
D. Podsolisation

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2. The rock formations that cannot store groundwater are called

A. Aquifers
B. Aquicludes
C. Perched aquifer
D. Spring

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3. The planet that takes the highest time for completing a rotation is

A. Mercury
B. Venus
C. Earth
D. Pluto

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4. The Penumbra is

A. The outer portion of the moon’s shadow
B. Formed by the tangent that intersects between the sun and the moon
C. Both (A) and (B)
D. None of the above

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5. The river situated along the border between the USA and Mexico is

A. The Rio Grande
B. The Amazon
C. The Mississippi
D. The Colorado

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