4.3-Cycles of Matter - 4

Which of the following is crucial for building proteins in animals?

• Carbon dioxide

• Nitrogen

• Helium gas

• Sulphur

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

The atmosphere contains approximately what percentage of nitrogen gas?

• 21%

• 78%

• 50%

• 95%

Nitrogen gas is referred to as "free nitrogen" because it is not:

• Found in the atmosphere

• Combined with other atoms

• Dissolved in water

• Attached to oxygen

What is the process called that converts nitrogen gas into a usable form for organisms?

• Photosynthesis

• Nitrogen fixation

• Respiration

• Decomposition

Which bacteria are responsible for fixing nitrogen and live on the roots of legume plants?

• Cyanobacteria

• Denitrifying bacteria

• Nitrogen-fixing bacteria

• Aerobic bacteria

Tags

NGSS.MS-LS2-2

Which of the following is an example of a legume plant?

• Oak

• Peas

• Maple

• Pine

Around 10% of nitrogen is fixed by which of the following natural phenomena?

• Earthquakes

• Volcanoes

• Lightning

• Rainfall

Once nitrogen has been fixed, which organisms utilize it to build proteins?

• Consumers

• Decomposers

• Producers

• Parasites

Nitrogen moves through which of the following in the nitrogen cycle?

• Rocks

• Soil, producers, and consumers

• Water, air, and bacteria

• Plants only

Tags

NGSS.MS-LS2-3

According to the law of conservation of mass, what remains constant during the nitrogen cycle?

• Nitrogen atoms

• Oxygen molecules

• Carbon dioxide levels

• Water content

Tags

NGSS.MS-PS1-5