NITROGEN CYCLE

T or F Plants can get nitrogen atoms for making chlorophyll and protein molecules by absorbing Nitrogen gas from the air

FALSE Plants can not use the N2 gas from the air.

T or F humans and other animals can get the Nitrogen atoms they need by absorbing N2 gas from the air. By absorbing N2 gas the animal be able to build protein molecules.

FALSE. Animals can not use the nitrogen atoms in the N2 gas which they breathe.

The group of plants which have Nitrogen fixing bacteria living in their roots are called

LEGUMES

Name two things in Nature which can change N2 gas into Ammonia ( NH3 ) and Nitrates ( NO3 )

Lightning Nitrogen Fixing Bacteria

Explain why all living things must obtain Nitrogen atoms

Living organisms need Nitrogen atoms in order to build important molecules. All living things use Nitrogen atoms to help build protein molecules. Proteins are extremely important molecules for living things. Some examples of human proteins include Insulin ( helps you to burn sugar ) Factor 8 ( allows your blood to clot ) Human Growth Hormone ( encourages growth and healing ) Keratin ( the protein in fingernails and other structures such as hooves and rhino horn ) Melanin causes light colored skin to TAN protects skin cells from UV light from the sun Testosterone helps to determine your gender and affects behavior Plants, algae, and some bacteria cells also need Nitrogen to Make the green pigment called Chlorophyll. Chlorophyll allows a cell to make glucose sugar

What is the chemical formula for the nitrogen gas molecules in our atmosphere ?

N2

Which of the molecules below contain Nitrogen which is "FIXED" ? N2 molecules NH3 molecules NO3 molecules

N2 molecules NOT fixed NH3 molecules FIXED NO3 molecules FIXED

Name three plants which are Legumes

Bean plants Pea Plants Clover alfalfa

T or F The nitrogen atoms in a molecule of Nitrogen gas are "Fixed" nitrogen

FALSE

What percent of the earth's atmosphere is made of Nitrogen gas molecules ?

78 percent of earth's air is N2 gas ( Nitrogen gas )

crop rotation

An agricultural technique in which crop species in a field are alternated from season to season.

T or F A living cell needs nitrogen atoms in order to build proteins

TRUE

T or F All living things need Nitrogen atoms.

TRUE

T or F Proteins are necessary for all living things

TRUE

T or F Some plants have developed a partnership with Nitrogen fixing Bacteria. The plants provide food and water and a place to live. The bacteria fix Nitrogen and fertilize the plant with Ammonia and Nitrate molecules

TRUE

T or F There is Nitrogen in our air

TRUE

T or F lightning can break apart N2 molecules in the air and recombine the Nitrogen atoms with Hydrogen to make NH3 and NH4 "molecules"

TRUE

T or F lightning can break apart N2 molecules in the air and recombine the Nitrogen atoms with Oxygen atoms to Make Nitrate "molecules" ( NO3 )

TRUE

T or F plants can not absorb N2 gas from the air, but they can absorb NH3 ( Ammonia ) and NO3 ( Nitrate ) molecules ... and use the nitrogen in these molecules to make proteins

TRUE