Why do you think you can see the effects on rocks after 200 years but not after 1 year?

Yes, It is that We can see the effects of rocks after 200 year but not in 1 year. We cannot live 200 years but we can find the effect of rock from 200 years ago to today. Because , For seeing effect of rocks It needs process through natural agents. Water,Wind, etc. are some natural agents.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

pie chart because it is in percents ( % )