Midterms 4

Question 1

is a biogeochemical process which
transforms the inert nitrogen present in the
atmosphere to a more usable form for living
organisms.
”

Answer 1

Nitrogen Cycle

Question 2

is the process by which nitrogen is converted between its
various chemical forms. This transformation can be
carried out through both biological and physical
processes.

Answer 2

Nitrogen CYCLE

Question 3

It involves a number of processes, including putrefaction,
degradation, nitrification, and denitrification.

Answer 3

Nitrogen CYCLE

Question 4

Step of Nitrogen Cycle

Answer 4

Nitrogen Fixation
Nitrification
Assimilation
Ammonification
Denitrification

Question 5

WHERE DOES NITROGEN
GAS COME FROM?

Answer 5

comes in both biological and inorganic
forms.

Question 6

process that changes nitrogen from
the air into a form that plants can
use, mainly ammonia

Answer 6

Nitrogen Fixation

Question 7

Type of Nitrogen Fixation

Answer 7

Biological Nitrogen fixation
Non-Biological
Industrial Nitrogen Fixation

Question 8

Done by certain bacteria

Answer 8

Biological Nitrogen fixation

Question 9

refers to processes that convert
atmospheric nitrogen (N₂) into
usable forms without the
involvement of living organisms.

Answer 9

Non-Biological

Question 10

Haber-Bosch process, which combines
nitrogen from the air with hydrogen
(usually from natural gas) to create
ammonia

Answer 10

Industrial Nitrogen Fixation

Question 11

process of enzymatic oxidation of ammonia
to nitrate by certain microorganisms in soil
and ocean

Answer 11

Nitrification

Question 12

inorganic nitrogen in the form of nitrates,
nitrites, and ammonia is absorbed by the
green plants via their roots and then it is
converted into nitrogenous organic
compounds.

Answer 12

assimilation

Question 13

It is the process of releasing ammonia by
certain microorganisms utilizing organic
compounds derived from the dead organic
remains of plants and animals and excreta
animals.

Answer 13

Ammonification

Question 14

It is the process of releasing ammonia by
certain microorganisms utilizing organic
compounds derived from the dead organic
remains of plants and animals and excreta
animals.

Answer 14

Ammonification

Question 15

The reduction of nitrates back into the large
inert nitrogen gas (N2), completing the
nitrogen cycle.

Answer 15

Denitrification

Question 16

The reduction of nitrates back into the large
inert nitrogen gas (N2), completing the
nitrogen cycle.

Answer 16

Denitrification

Question 17

is derived from the word “bio” meaning biosphere and “geo’’ meaning the geological components and “chemical” meaning the elements that move through a cycle.

Answer 17

Biogeochemical

Question 18

is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out through both biological and physical processes.

Answer 18

nitrogen cycle

Question 19

Some symbiotic bacteria, blue-green algae and some free-living bacteria are able to fix nitrogen as organic nitrogen.

Answer 19

Biological Nitrogen fixation

Question 20

In this process,atmospheric nitrogen combines with oxygen (as ozone) during lightning or electrical discharges in the clouds and produces different nitrogen oxides

Answer 20

Non-biological Nitrogen Fixation

Question 21

under great pressure at a temperature of 600’C and with the use of an iron catalyst, hydrogen and atmospheric nitrogen can be combined to form ammonia (NH3) in the haber-Bosch process.

Answer 21

Industrial Nitrogen Fixation

Question 22

In this process, inorganic nitrogen in the form of nitrates, nitrites, and ammonia is absorbed by the green plants via their roots and then it is converted into nitrogenous organic compounds

Answer 22

Nitrogen assimilation

Question 23

It is the process of releasing ammonia by certain microorganisms utilizing organic compounds derived from the dead organic remains of plants and animals and excreta animals.

Answer 23

Ammonification

Question 24

A process of enzymatic oxidation of ammonia to nitrate by certain microorganisms in soil and ocean.

Answer 24

Nitrification

Question 25

The reduction of nitrates back into the large inert nitrogen gas (N2), completing the nitrogen cycle.

Answer 25

Denitrification

Question 26

Sometimes, nitrates of soil are locked up in the rocks while they are washed down to the sea or leached deeply into the earth along with percolating water. This phenomenon is known as

Answer 26

Sedimentation