The controlled variable in the experiment is the amount of water. The student ensured that each of the 6 tomato plants received the same amount of water and fertilizer each day, which keeps this factor consistent across all plants. The other variables, such as the hours of sunlight and the resulting sweetness of the fruits or the number of leaves produced, were the ones being tested and measured.
Use the scenario to answer the question.
A student is studying the effects of sunlight on tomato plants. She chooses 6 tomato plants, making sure that each of them receives 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 a tomato from each plant and has them rank the fruits by their sweetness. She also records the total number of leaves produced on each tomato plant.
Which variable was controlled in the experiment?
amount of water
number of leaves
sweetness of fruit
hours of sunlight
1 answer
1 answer