Question

20 POINTS

A scientist sets up an experiment to test which fertilizer has the best effect on increasing fruit size in a single variety of avocado trees. They grow one group of avocado trees using Fertilizer-A, one group using Fertilizer-B, one group using Fertilizer-C, and one group grown without any fertilizer.

All the avocado trees are given the same amount of water and sunlight, and they are all grown during the same period of time.

Which of the following is the independent variable in this experiment?

Question 2 options:

The type of fertilizer used


The size of the avocados


The amount of water, sunlight, and time


The amount of water only

Answer 1

The type of fertilizer used

Step-by-step explanation:

Answer 2

The independent variable in this experiment is the type of fertilizer used.

An independent variable is a factor that is manipulated or changed by the experimenter to test its effect on a dependent variable. In this experiment, the scientist is comparing the effect of different fertilizers (Fertilizer-A, Fertilizer-B, Fertilizer-C) on the size of the avocados. Therefore, the type of fertilizer used is the independent variable.

Step-by-step explanation: