Question

As the human population increases, scientists and enigneers look for new ways to increase the amount of food from crops. Two students perform an experiment to find out if different fertilizers increase the growth of pea plants over time. They slect four differentfertilizers for testing. They plant seeds in separate pots. Each pot receives 350mL of a fertilizer and water solution every other day. The control plants receives 350mL of tap water instead of a fertilizer solution every other day. Every 10 days, the height of each plant is measured in centimeters. Their results are shown in the data table.What does the data in the table show?A. The control plant grew the best.B. The plants with fertilizer grew better than the control plant.C. Fertilizer B is the most effective fertilizer.D. The fertilizers made the most difference in growth between day 10 and day 20.

Answer 1

The table shows that all of the plants that received fertilizers grew more than the control plant, as the control plant has 35 centimeters in day 50 and all of the others has 43 centimeters or more. Therefore, A is incorrect.

The plant that received fertilizer B has 43 centimeters in day 50, being the shortes plant among the fertilized ones (the other has from 45 to 55 centimeters). Therefore, C is incorrect too.

On day 20, there is no big differencies between the height of the fertilized plants and the control plant. Most of them stayed in heights like 10, 11 or 12. The heights in day 50 show bigger differencies. Therefore, D is incorrect as well.

All of the plants that received fertilizers grew at least