Nitrogen compounds are often used as fertilizers to increase plant growth.
sometimes there is much more nitrogen than plants need. what happens to
most of this excess nitrogen?
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a. it ends up in the ocean, where it feeds algal blooms.
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b. it moves into the air during transpiration in the plants.
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c. it changes into harmless compounds used by bacteria.
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d. it remains in the soil until it is used by other plants.
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in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.