Nitrogen Cycle Brainpop

Approximately what percentage of the atmosphere is made up of elements other than nitrogen and oxygen?

• 50 percent

• 10 percent

• 5 percent

• 1 percent

Why is nitrogen essential to the growth of a fungus,

but not to the spread of rust?

• A fungus grows much faster than rust

• A fungus is a living organism, while rust is not

• A fungus needs less oxygen than rust

• A fungus cannot grow on metal, while rust can

Tags

NGSS.MS-LS2-1

What can you infer from the fact that nitrogen gas is

useless to animals?

• Animal cells can only use nitrogen when it's combined with other elements

• Animal cells cannot process gases before they are converted into liquids and solids

• Animal cells do not require nitrogen to function

• Animal cells only require nitrogen after the death of the animal

Based on this diagram, which of the following can you infer is the chemical formula for gaseous nitrogen?

• N

• N2

• N3

• N4

Tags

NGSS.MS-PS1-1

What conclusion can you draw from the fact that

sewage adds nitrogen compounds to the

environment?

• Plants get rid of nitrogen compounds in their waste

• Animals get rid of nitrogen compounds in their waste

• Animals and plants both get rid of nitrogen in their waste

• Neither plants nor animals get rid of nitrogen in their waste

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following would be true if only nitrogen-fixing bacteria, and not nitrifying bacteria, were present in the soil?

• Gaseous nitrogen would build up in the soil

• Hydrogen would build up in the soil

• Ammonia would build up in the soil

• Oxygen would build up in the soil

Which of the following would attract the bacteria

responsible for ammonification?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following most accurately describes

the path of a nitrogen molecule through the

environment?

• It moves through the environment once--going from gas, to solid, and back to gas

• It moves through the environment repeatedly, and always in the same order

• It moves through the environment repeatedly, but not necessarily in the same order

• It moves through the environment twice, then disappears

Tags

NGSS.MS-LS2-3

What do nitrification and denitrification have in common? a. b. c. d.

• Both processes involve oxygen atoms

• Both processes produce nitrogen gas

• Both processes take place in the atmosphere

• Both processes are carried out by the same type of bacteria

Tags

NGSS.MS-LS2-1

What is the main difference between denitrification

and the other three steps of the nitrogen cycle?

• Bacteria are not involved in the process of denitrification

• Denitrification changes nitrogen into a gaseous form

• Denitrification takes days; the other steps are instant

• Denitrification isn't necessary to complete the nitrogen cycle