Have an account?
What converts nitrogen gas into a usable form for plants and animals?
The process in which nitrogen circulates and is recycled is called
The nitrogen cycle
The carbon cycle
The water cycle
The phosphorus cycle
Organisms that need nitrogen to survive.
all living things
How is nitrogen "fixed" into a usable form for plants?
Through action of bacteria only
Through lightning only
Through action of bacteria and lightning
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
Gas that makes up 78% of our atmosphere.
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
What is the formula for atmospheric nitrogen?
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Plants and animals cannot use nitrogen directly from the air.
Bacteria fix nitrogen from the atmosphere into a form plants can use.
In the nitrogen cycle, what does label A in the diagram represent?
Carbon dioxide in the atmosphere
Nitrogen in the atmosphere