WorksheetsThe Nitrogen Cycle and the Phosphorous Cycle: Mastery Test
Total questions: 20
Worksheet time: 11mins
Jake wants to enrich the nitrogen content of his soil through fixation. Which crop can he use for this purpose?
wheat
sugarcane
cashew nuts
alfalfa
usan is a geological researcher measuring the rate of removal of phosphorous from sedimentary rock during the phosphorous cycle. What process is Susan investigating?
mineralization
eutrophication
weathering
decomposition
Mary is campaigning for improved air quality in her city. She is very concerned about carbon and methane outputs, but not phosphorous. Why is that?
She thinks phosphorous makes a positive contribution to air quality.
Phosphorous is most commonly found as phosphate rock.
She doesn’t know a lot about phosphorous.
She doesn’t consider phosphorous to be a greenhouse gas.
In what form will Susan be able to capture that phosphorous as it is released from the sedimentary rock?
phosphorous granules
phosphate powder
soluble phosphate
soluble phosphorous
Jill takes her children to play in the park every afternoon. She notices that since the city changed their landscaping service, the pond in the center of the park is now covered with algae.
What is the most probable cause?
too much rain
not enough rain
excessive application of fertilizer
insufficient application of fertilizer
Select all the correct answers from menu.
What happens during nitrification?
During nitrification, bacteria convert ammonia into _______________
and ________________.
nitrogen
oxygen
nitrite
phosphorous
nitrate
Type the correct answer in the box. Spell all words correctly.
What happens when nutrient levels become too concentrated in rivers, lakes, and oceans?
When nutrient levels get too high, water quality degrades and oxygen levels are depleted through a process known as (a) .
Type the correct answer in the box. Spell all words correctly.
What is the correct term for low levels of oxygen in a body of water?
When microbial action during decomposition in aquatic ecosystems removes too much oxygen, the body of water experiences (a) .
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
This is NOT a part of the phosphorus cycle.
Phosphate is incorporated into sedimentary rocks
Phosphate bound to soil
Atmospheric phosphate
Phosphate is absorbed from the soil by plants
What is the phosphorus' symbol on the periodic table?
P
pH
Ph
H
True or false: Phosphorous can enter the atmosphere
True
False
