Agroup of 4 students want to design an experiment in an effort to support the hypothesis, “sunlight is needed for the normal healthy growth of plants.” each student presented a possible experiment. student #1: purchase 20 plants. plant 10 of the plants in 3 cups of soil and place all of the cups in the sun. take the other 10 plants and put them in 2 cups of soil, then place this group in the sun under a box. observe and document changes. student #2: place 10 plants outside in the sunlight. place the other 10 plants outside under a box. plant both in the same amount of soil and provide all with the same amount of water. document observations. student #3: place 20 plants in front of a window. give all of the plants the same amount of water and the same type of soil. observe plants for any changes. student #4: obtain two seeds. place one seed outside and one on an inside window sill. observe and document which seed sprouts the fastest. which student provides the best reason for choosing his or her experiment to test the hypothesis?
a.
student #4: “seeds grow into plants, so if the seeds are healthy, then the plants will also be healthy.”
b. student #3: “all of the plants were placed in the sun and kept under the same conditions.”
c. student #2: “included are 10 plants that were not placed in the sun.”
d. student #1: “the plants will react differently in different amounts of soil”