(C) II, III, and IV
(D) III, IV, and V
(E) I, II, III, IV, and V
- The cycle that is most common to all other cycles is the (A) nitrogen cycle
(B) carbon cycle
(C) hydrologic cycle
(D) life cycle
(E) the rock cycle
- The energy that drives the hydrologic cycle comes primarily from (A) trade
winds
(B) solar energy and gravity
(C) Earth’s rotation on its axis
(D) ocean currents and wind patterns
(E) solar radiation
- Which one of the following processes is working against gravity?
(A) Precipitation
(B) Percolation
(C) Runoff
(D) Transpiration
(E) Infiltration
- Ammonium ions (NH 4 +) are converted to nitrate (NO 3 – ) and nitrite ions
(NO 2 – ) through which process?
(A) Assimilation
(B) Denitrification
(C) Nitrogen fixation
(D) Nitrification
(E) Ammonification
- Which form of nitrogen is most usable by plants?
(A) Nitrate
(B) Nitrite
(C) Nitrogen gas
