[ 291 ] 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. How many plants would make the best representative population sample for this experiment? A. 2 B. 10 C. 100 D. 1,000
