Liam wants to design an experiment to test the effect of salt on plant growth. he writes the following hypothesis: increasing the amount of salt in the soil that geraniums are grown in will cause a reduction in their growth rate. based on liam's hypothesis, complete the chart below by determining the independent and dependent variables that he should use in his experiment.
a. the amount of fertilizer added to the soil
b. the growth rath of the geraniums
c. the flower color of the geraniums
d. the amount of salt added to the soil