How does soil convert the organic matter back to co2? a. through corrosion b. through photosynthesis c. through litterfall d. by decomposing it e. by human activities only

D-by decomposing it.

The organic matter present in the soil is decomposed by enzymatic biochemical reactions through the bacteria, microbes and worms present in the soil. The soil organic matter constitutes mostly animal and plant residues.

Majority of the organic matter is broken down by microbes or bacteria through enzymatic biochemical chemical reactions into CO2, water and heat.

The nitrogen, phosphorus and sulphur are mineralised and liberated into the air by several reactions.

Compounds which are resistant to the microbial reactions are modified into various componds or synthesized into new compounds by the microbes to form humus.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day