Nitrogen Cycle

How animals get the nitrogen they need

• from the air they breathe

• from the water they drink

• from the food they eat

• from the Sun

Organisms that need nitrogen to survive

• only plants

• only animals

• only bacteria

• all living organisms

Tags

NGSS.MS-LS2-1

Organisms that play a role in the nitrogen cycle

• only plants

• only animals

• only bacteria

• plants, animals, & bacteria

Nitrogen rich fertilizers and manure can cause water pollution.

• True

• False

Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere

• bacteria

• plants

• animals

• producers

Tags

NGSS.MS-LS2-3

How plants get the nitrogen they need

• from the air

• from the soil or water in which they live

• from the Sun

• from broken down rocks

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Gas that makes up almost 80% of Earth's atmosphere

• oxygen

• carbon dioxide

• nitrogen

• hydrogen

When is nitrogen called "free nitrogen"?

• When it is not combined with other molecules

• When it has fertilizer in it

• When it evaporates into the sky

• When it is combined with other molecules

What is it called when organic matter is in the process of decaying by bacteria and fungi?

• Bacteria

• Denitrification

• Decomposing

• Free nitrogen

Tags

NGSS.MS-LS2-3

What is nitrogen fixing bacteria?

• When bacteria fixes nitrogen into being able to be alive and evaporating into the air to make clouds

• When bacteria fixes nitrogen to be healthy

• organisms that are capable of transforming nitrogen gas into "fixed nitrogen" liquids

• microorganisms that are capable of transforming nitrogen gas into "fixed nitrogen" compounds

Tags

NGSS.MS-LS2-1