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Student(s):Huang Sih Chi ,Lu Yu Chia
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Teacher:
Date Submitted: 03/10/2020

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This study is to explore the relationship between soil and rain and change in pH. we discover:
a. The soil is alkaline: Keelung rainwater is indeed acidic. The average pH in 2020 is about 4.3, but the pH value of the soil we observed is alkaline, which is different from the state we imagined.

b.The soil pH value will recover: Although the rainwater is acidic, the pH value will increase after the rain.

c.Differences in vegetation cover: The part with vegetation is more alkaline than the one without vegetation.

d. Humidity and soil acid-base: When the humidity rises, the pH value of the soil will change, including the increase in the pH value of the vegetation but the decline without the vegetation.
We speculate that it may be the microorganisms in the soil or that the rainwater reacts with the soil, and further research is needed in the future.