Worksheetsnitrogen cycle
Total questions: 20
Worksheet time: 18mins
Where can nitrogen fixing bacteria be found (2 right answers)
Free living in the soil
under the leaves of flowering plants
in the atmosphere
living on the nodules of certain plants
This can transform nitrogen in the atmosphere into a usable form of nitrogen
rain
ice
lightning
sun
True or False. The nitrogen in the atmosphere is in the right form for living things to use.
True
False
In the nitrogen cycle, what does label A in the diagram represent?
Gas
Clouds
Carbon dioxide in the atmosphere
Nitrogen in the atmosphere
Bacteria create a form of nitrogen that animals can use directly.
True
False
Bacteria fix nitrogen from the atmosphere into a form plants can use.
True
False
A correct path that nitrogen could take would be
air -> animals -> plants -> bacteria
animals -> air -> bacteria -> plants
bacteria -> air -> plants -> animals
air -> bacteria -> plants -> animals
The process that allows organisms to use nitrogen
assimilation
denitrification
fixation
ammonification
According to this diagram, animals get proteins from eating ________________________
decomposers
bacteria
plants
sunlight
According to this diagram, plants absorb
nitrates
nitrogen fixing bacteria
animals
decomposers
According to this diagram, plants use nitrogen to make _________________________
bacteria
animals
proteins
decomposers
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
What is the formula for atmospheric nitrogen?
N
N2
NH3
NO3
Gas that makes up 78% of our atmosphere.
Oxygen
Nitrogen
Hydrogen
Carbon Dioxide
How do animals get the nitrogen they need?
From the air they breathe
From the water they drink
From the food they eat
From the sun
How is nitrogen "fixed" into a usable form for plants?
Through action of bacteria only
Through lightning only
Through action of bacteria and lightning
Through photosynthesis
Organisms that need nitrogen to survive.
only plants
only animals
only bacteria
all living things
The process in which nitrogen circulates and is recycled is called
The nitrogen cycle
The carbon cycle
The water cycle
The phosphorus cycle
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
