Question

1 use the following information to answer items 1 through 3.
a student conducts an experiment to grow tomato plants and collects the following data.

fertilizer used	height after 60 days (in cm)	number of seeds planted	size of pot (in cm)
fertilizer b	31.75	5	15
fertilizer c	35.56	5	15

what question was the student most likely trying to answer with this experiment?

a how tall can different species of tomato plants grow?
b what size pot do tomato plants grow best in?
c how long does it take a tomato plant to flower?
d how does the type of fertilizer affect how fast a tomato plant grows?

Explanation:

• Option A: The experiment doesn't involve different tomato species (only one type, as pot size, seeds planted are same), so A is wrong.
• Option B: Pot size is constant (15 cm) for all, so not testing pot size, B is wrong.
• Option C: The data is about height after 60 days, not flowering time, C is wrong.
• Option D: The independent variable is fertilizer type (A, B, C), and dependent is plant height (growth). Other factors (pot size, seeds) are controlled. So the experiment tests how fertilizer type affects growth.

Answer:

D. How does the type of fertilizer affect how fast a tomato plant grows?