Nitrogen and Phosphorus cycles

Question 1

how much of the earths atmosphere is nitrogen

Answer 1

78.1%

Question 2

Which processes are involved in nitrogen cycle

Answer 2

“Nitrogen fixation,nitrification,ammonification and dentrification ‘

Question 3

Nitrogen fixation

Answer 3

Bacteria converts atmospheric nitrogen (N2) into ammonium (NH4)

Question 4

Nitrification

Answer 4

Other bacteria convert ammonium(NH4) into nitrate (NO3) or lighting can convert atmospheric nitrogen into nitrates (NO3)

Question 5

Ammonification

Answer 5

Detritus is decomposed and NH4is released back into soil and most of it is converted into NO3 or NO2 which plants can use

Question 6

Denitrification

Answer 6

Some bacteria use the oxygen from NO3 and NO2 and the remaining Nitrogen is returned back into atmosphere

Question 7

Reservoirs for nitrogen

Answer 7

Soil and the atmosphere

Question 8

Human impacts on nitrogen cycle

Answer 8

Agricultural: removes nitrogen from soil
Deforestation: removes nitrogen from soil
Fertalization : returns nitrogen and phosphorus to soil

Question 9

Fertilizers may also

Answer 9

’ Create acidic soil and limit ‘lt types of bacteria that can grow there e whore less decomposition and can run off ( water flowing down a mountain ) into H2O and cause algal blooms which deer decreases O2 levels, fish to die and increase decomposes (bacteria)

Question 10

Overpopulation

Answer 10

Too much excretion nitrogen found in urine

Question 11

Which vital organic compounds vital for life contain nitrogen

Answer 11

DNA and proteins

Question 12

What are two sources of fixed nitrogen that plants use

Answer 12

NO3 and NO2

Question 13

Flow chart of conversion of atmospheric nitrogen

Answer 13

N2>NH4>NO2>NO3

Question 14

What causes nitrogen to react with oxygen and produce nitrates

Answer 14

Lighting and bacteria

Question 15

What are fertilizers

Answer 15

Nitrogen and phosphorus

Question 16

Can atmospheric nitrogen be used by organisms

Answer 16

By many no that’s why it’s needed to be converted into NO3 and NO2 or NH4

Question 17

Nitrogen in the air how it exists n uses

Answer 17

78.1% of atmosphere is made up of nitrogen but it cannot be used in that form by many organisms and just exists in air

Question 18

Nitrogen in water existence and function how its converted

Answer 18

Nitrogen gas is removed from atmosphere via bacteria which converts it into ammonium NH4 which can be used by some plants
Some aquatic plants convert ammonium into NO3 which plants use and other is converted back into nitrogen gas via denitrification

Question 19

Nitrogen in soil function and use

Answer 19

Plants and animal wastes decompose into soil adding nitrogen , decomposrs also bring nitrogen into soil denitrifying bacteria convert nitrogen compounds into gas again

Question 20

What are phosphorus reservoirs

Answer 20

Rocks soil oceans

Question 21

What is the only element or nutrient not found in atmosphere

Answer 21

Phosphorus

Question 22

Use of phosphorus

Answer 22

In cell membrane phospholipids ATP energy DNA bones

Question 23

What is phosphorus

Answer 23

Essential nutrient that is found in limited quantities within the environment

Question 24

Is phosphorus found in the atmosphere

Answer 24

Noo

Question 25

What is phosphorus commonly used for

Answer 25

As fertilizer

Question 26

Weathering dose what

Answer 26

Release’s phosphorus trapped in rocks

Question 27

Processes involved in phosphorus cycle

Answer 27

Geological uplift weathering and runoff

Question 28

Short term phosphorus cycle

Answer 28

Plants and algae use it to form phosphate which is soluble in water so animals drink it and plants absorb it during photosynthesis
Then heterotrophs eat plants and animals and phosphate gets returned when they die and decompose

Question 29

Long term phosphorus

Answer 29

Bones and shells from dead animals settle on ocean floor and are covered in sediment which form rocks containing phosphate

Question 30

Weathering phosphorus cycle

Answer 30

Weathering causes rocks to smooth releasing trapped phosphorus making it available to organisms again

Question 31

Geological uplift phosphorus

Answer 31

Over long periods of time phosphorus containing rocks may get moved from ocean floor to land very slow process takes 100000 yrs

Question 32

Runoff phosphorus

Answer 32

Algal growth in aquatic environments is limited by available nutrients which can result in algal bloom overgrowth due to excess phosphorus which results in more organic matter less Oxygen and fish to die

Question 33

Human impacts phosphorus

Answer 33

Global warming more severe storms more erosion and weathering more run off into oceans and fertilizers and detergents containing phosphorus causes eutrophication