[ 289 ] Life Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Experiment: Does fertilizer A help plants grow faster than fertilizer B? Process: First, identify what variables will be tested and what variables should be controlled. Fertilizers A and B should be applied to the same type of plant. This makes the type of plant one of your controls. The independent variable will be ___________. Experiment: Does fertilizer A help plants grow faster than fertilizer B? Process: First, identify what variables will be tested and what variables should be controlled. Fertilizers A and B should be applied to the same type of plant. This makes the type of plant one of your controls. The dependent variable will be __________. Experiment: Does fertilizer A help plants grow faster than fertilizer B? Process: First, identify what variables will be tested and what variables should be controlled. Fertilizers A and B should be applied to the same type of plant. This makes the type of plant one of your controls. How will you measure the plant growth (height, mass, etc.)? What instrument will you use?