The Haber process converts nitrogen gas into ammonia<span> used in fertilizers. </span>Ammonia<span>is converted to nitrates by nitrifying </span>bacteria in the soil<span>. Plants absorb nitrates from the </span>soil<span> and use these to build up proteins. The plant may be eaten by an animal, and its biomass used to </span>produce<span> animal protein.</span>
Through weathering and the erosion of rocks and soil, Earth’s landscape can change drastically overtime. As a result, watersheds may disappear if the land making the watershed is worn away, and the water collected is <span>able to flow back into the river, as the area is level with the rest of the land.</span>