Mark is studying the effect of carbon emissions from his car on air quality. He does this by putting his car in a closed air environment and letting it run for specified amounts of time. From a remote distance (where he is safe), Mark measures the carbon dioxide, carbon monoxide, and methane levels in the air. From here, Mark will recreate the conditions caused by his car on a smaller scale in his lab, to determine the possible molarity of the acid rain as a result.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

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