Answer:
Scientists have determined that humans are disrupting the nitrogen cycle by altering the amount of nitrogen that is stored in the biosphere. The chief culprit is fossil fuel combustion, which releases nitric oxides into the air that combine with other elements to form smog and acid rain.
Answer:
<em>The less mass an object has, the </em><u>less</u><em> its gravitational [force.]</em>
Explanation:
Newton's Law of Gravity states that 
. The two <em>m</em> values are the objects' masses, G is the gravitational constant, and <em>r</em> is the distance between the objects' centers. Notice how the mass values are in the fraction's <em>numerator</em>? That means <em>increasing</em> the mass of one or both objects <em>increases</em> 
. That also implies the inverse; <em>decreasing</em> the mass of one or both objects <em>decreases</em> !
I hope this helps you understand this concept a little more! Have yourself a fantastic day, 'kay?
homework
or just play some 2012 math game
<span>The life forms of the biosphere are located within Earth's surface.</span>
