2019 Year 12 IB Extended Essays

Table of Contents Research Question:........................................................................................................... 2 Background Research: ...................................................................................................... 2 What is greywater? ......................................................................................................................................2 How do plants use nitrates? ........................................................................................................................2 Current issues that Australian farmers face regarding Salinity: .................................................................3 Transportation mechanisms used within plants: ........................................................................................3 How does salinity affect plant growth? .......................................................................................................3 How do high levels of Nitrates affect plant growth? ..................................................................................2 Why use hydroponics rather than growing the plants in soil? ...................................................................4 Hypothesis: ...................................................................................................................... 5 Variables:......................................................................................................................... 5 Independent variable...............................................................................................................5 Dependent Variable: ................................................................................................................6 Controlled Variable: .................................................................................................................6 Safety Considerations: ............................................................ Error! Bookmark not defined. Ethical Considerations: ..................................................................................................... 8 Environmental Considerations: ............................................... Error! Bookmark not defined. Apparatus: ....................................................................................................................... 9 Procedure:........................................................................................................................ 9 Results ........................................................................................................................... 11 Raw Data:..............................................................................................................................11 Data Analysis: ........................................................................ Error! Bookmark not defined. Bibliography: .........................................................................................................................25 Appendices:.................................................................................................................... 29

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