To investigate on how soil affects the pH of water.
http://www.sciencebuddies.org/science-fair-projects/project_ideas/EnvSci_p013.shtml
Project Title 2:
An investigation on how roots roots grow when the direction of gravity changes
http://www.sciencebuddies.org/science-fair-projects/project_ideas/PlantBio_p034.shtml#summary
Project Title 3:
An investigation of how dissolved oxygen changes in water samples at different temperatures.
http://www.sciencebuddies.org/science-fair-projects/project_ideas/EnvSci_p014.shtml#procedure
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