Effects of Salt Concentration and Seed Germination

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Effects of salinity VS length of mungbeans. Research Question: What is the effect of changing the salt concentration (NaCl) VS the length of radical? I will be testing with 5 different salt concentrations (0.0%, 0.2%, 0.4%, 0.6% and 0.8%) and will see the growth of the mungbean radical. The growth of the radical will be measured every day using a string and ruler. It is expected that the the length of the radical would decrease as the salt solution increases. Hypothesis: I think that when the NaCl solution concentration increases the length of the radical would decrease. The fact is that as the salt solution concentration increases it weakens the plant ability to absorb water/ nutrients in order to grow. Variables: Independent: Salt concentration (0.0%, 0.2%, 0.4%, 0.6% and 0.8%) Dependent: Length of radical (cm) Controlled variables: Controlled? Amount of seeds (mung beans) per petri dish (8 beans) How? By counting each one of the beans to make sure you have 8 beans per petri dish and if you need get someone to re­count it. Why? Because we have eight trials for each petri dish we want to keep that the same so that we won’t get confused with which trial is which if we have too many seeds or if we have too little seeds we will not be able to collect enough data for the average in order to get a reliable result If we water too much of the solution than that could lead to drowning the seeds. If we water too little this could lead to the seed drying out Because if the plants are not watered everyday the seeds would dry out and not germinate but if it’s watered too often then the seed would drown in the water and not germinate Amount of solution watered to By using a measuring beans (12ml) cylinder to measure the solution. Day of watering plant By remembering to come to (everyday for 3 days straight) class everyday for 3 days straight. Area where petri dish

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