Question

question 4 (1 point)
plants absorb nitrogen from the soil primarily in the forms of nitrate and ammonium.

word bank:
ammonium potassium phosphorus mobile ammonium acidic

blank 1: ammonium

question 5 (1 point)
why is it critical to use distilled water rather than tap water when testing soil ph?

a distilled water adds necessary nutrients to the sample.

b distilled water reacts faster with the soil particles.

c tap water may contain ions or have a ph that skews the results.

d tap water is too cold for the chemical reaction to occur.

Explanation:

Question 4: Plants absorb nitrogen mainly as nitrate ($NO_3^-$) and ammonium ($NH_4^+$), so the blank is filled with ammonium.
Question 5: Tap water often contains dissolved ions (e.g., minerals, chemicals) or has its own pH, which would alter the true pH of the soil sample. Distilled water is pure and neutral, ensuring accurate results.

Answer:

Question 4: ammonium
Question 5: c. Tap water may contain ions or have a pH that skews the results.