WorksheetsThe Nitrogen Cycle in Aquariums
Total questions: 13
Worksheet time: 25mins
Name
Class
Date
1.
When fish excrete their waste, what toxic byproduct is produced?
a)
nitrogen
b)
nitrites
c)
ammonia
d)
nitrates
2.
What does toxic mean?
a)
poisonous
b)
murky
c)
dirty
d)
salubrious
3.
After the ammonia is in the tank, which bacteria start to change it to something less toxic?
a)
nitrogen bacteria
b)
nitrosomas bacteria
c)
nitrobactor bacteria
d)
ammonia bacteria
4.
Once the nitrosonomas bacteria decompose the toxic ammonia, the deadly ammonia is changed into the less toxic ___________.
a)
nitrite
b)
nitrate
c)
carbon dioxide
d)
oxygen
5.
Now the less toxic nitrites are changed into something safer by the _____________ bacteria.
a)
nitrosomas
b)
ammonia
c)
nitrobactor
d)
toxic bacteria
6.
Once the nitrobactor bacteria decompose the deadly nitrites, the nitrites are changed to the less toxic __________
a)
ammonia
b)
nitrites
c)
nitrates
d)
H2O
7.
What is one way to lower the amount of nitrates in your tank?
a)
do a partial water change
b)
add more fish
c)
remove fish
d)
lower the water temperature
8.
As the aquarium gets "older" it gets __________ toxic.
a)
more
b)
less
9.
What is another way to lower the nitrate level in your tank?
a)
add fish
b)
add snails
c)
add plants
d)
remove plants
10.
This bacteria changes nitrites into nitrates
a)
nitrosomona bacteria
b)
nitrobacter bacteria
c)
penicillan
11.
At the very beginning of an aquarium set-up which of these levels will be the highest at least until the nirtosonoma and nitrobactor bacteria begin to do their thing?
a)
ammonia
b)
nitrites
c)
nitrates
d)
salt
12.
This bacteria changes ammonia into nitrites.
a)
nitrosomona bacteria
b)
nitrobacter bacteria
c)
penicillin bacteria
13.
Would it be fun to have a classroom aquarium?
a)
Yes
b)
No
c)
Maybe
100 %
