Use the scenario to answer the question.

Question

A student decides to test the effects of watering on plants. She chooses 6 tomato plants and places all of them in the same part of a garden with plenty of space between them. They get the same amount of sunlight and the same amount of fertilizer each day. She gives each plant a different amount of water, with the first plant getting no water and the others getting 200 mL, 400 mL, 600 mL, 800 mL, and 1,000 mL. She records the total height of the plants each day for 3 weeks.

What is the independent variable in this experiment?

(1 point)
Responses

plant height
plant height

amount of water
amount of water

amount of fertilizer
amount of fertilizer

sun exposure

Answer 1

amount of water

Answer 2

The stem of a plant is growing upward while the roots grow downward. Which of these stimuli correctly describes the response of the plant?(1 point)
Responses

temperature
temperature

touch
touch

light
light

gravity

Answer 3

gravity