A student is studying the effects of sunlight on tomato plants she chooses 6 tomato plants, making sure that each of them received the same amount of water and fertilizer each day. She gives one plant 0 hours of sunlight each day, with the other 5 plants receiving 1,3,5,7. And 9 hours of sunlight. At the end of the experiment she has people try tomato from each plants and has them rank the fruits by their sweetness she also records the total number of leaves produced on each tomato plant.

Question

Which variable was controlled in the experiment

Answer 1

The variable that was controlled in the experiment was the amount of water and fertilizer each plant received. This ensured that all plants were receiving the same nutrients and hydration, allowing the study to focus specifically on the effects of sunlight on the tomato plants.