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?
(1 point)
Responses
sweetness of fruit
sweetness of fruit
hours of sunlight
hours of sunlight
amount of water
amount of water
number of leaves
1 answer
The variable that was controlled in the experiment is amount of water.
The student ensured that each tomato plant received the same amount of water and fertilizer each day, which makes water a controlled variable. The sweetness of the fruit and the number of leaves are the variables being measured, while the hours of sunlight differ for the plants and are the independent variable being manipulated.
1 answer
3 answers
1 answer
1 answer