<u>Answer</u>:
<em>Topographic maps are plan-see portrayals of Earth's three-dimensional surface. They are a standard kind of guide see that gives an overhead, or elevated, point of view. </em>
<u>Explanation</u>:
Among the characterizing <em>highlights of a topographic guide are the form lines that demonstrate areas of consistent height.</em>
The height interim between the shape lines is subject to the degree of detail gave by the <em>guide and the sort of geology present. </em>
For instance, areas with critical topographic variety may require shape lines isolated by 40-100 ft., <em>though by and large level lying districts with minimal topographic variety may have all the more comprehensively isolated 10-20 ft. forms.</em>
Acid rain from Los Angeles changed the chemistry of the river, resulting in the death of many fish.Due to human activities in Los Angeles, pollution is not anymore shocking. The acid rain would be distributed to the river which would change the environment of the aquatic life.
In this circumstance one should revise the hypothesis and develop a new experiment to test it.An example could be the theory of Agraham Gottloeb Werner that all rocks were precipitated from water including not just sedimentary rocks but also volcanic, plutonic and metamorphic rocks. The more the earth was studied, especially by James Hutton in Scotland, the more it became obvious that granites for example were deposited in a molten state, thus disproving that hypothesis or theory.
