Nitrogen Cycle

What is the chemical equation for nitrate?

• NH3

• N2

• NO2

• NO3

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

Tags

NGSS.MS-LS2-1

What is the main reservoir of nitrogen?

• Water bodies

• Plants

• Atmosphere

• Soil

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

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

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-7

Organisms require nitrogen to make which of the following?

• glucose and starch
• lipids and nucleic acids
• proteins and nucleic acids
• carbohydrates and proteins

Tags

NGSS.MS-LS1-7

Process where excess nutrients enter body of water causing overgrowth of aquatic plants and algae...

• Eutrophication
• Acid Precipitation
• Nitrogen Fixation
• Decomposition

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How much of the atmosphere is composed of oxygen?

• 87%

• 38%

• 78%

• 21%

What can excess amounts of nitrogen cause in ecosystems? 

• Disrupts the equilibrium of ecosystem, causing number of species to decline
• Leads to improvement of an ecosystem due to healthy plant growth
• Leads to high oxygen content in aquatic ecosystems
• Increases the speed of decomposition of plants and animals 

Some plants contain nitrogen in their _________.

• Leaves

• Steam

• Flower

• Roots

Majority of nitrogen fixation occurs by

• Biological nitrogen fixing organisms

• Lightning

• volcanic eruptions

• Haber–Bosch process