Question

question 2 (1 point)
ada and elijah have decided to do an experiment testing how sunlight affects plant growth. the students choose the same type
of plants, soil, pots and amount of water they give the plants. they also make sure each plant is put in their designated area (one
in a closet, one in front of a window that only gets light for 1/2 the day, and
the plant in the closet had the least amount of growth.
what are the constant variables that ada and elijah used in their experiment?
o a
types of plants
b
type of soil
c
the amount of light
d
a and b

Explanation:

In an experiment, constant variables are the factors that are kept the same throughout. Here, the students chose the same type of plants (so types of plants is constant), they gave the plants the same amount of time each day (implies same amount of care in terms of time - related aspects like watering time etc., but more importantly, they made sure each plant has the same amount of soil (as they control soil, pots, amount of water). Also, the amount of light is a variable they are testing (one plant gets more light - outside, one gets less - in front of window for 1/2 day, one gets least - in closet), so it's not a constant.

Answer:

A. Types of plants, C. the amount of soil, D. A and B (since types of plants and amount of soil are constant. If we assume that when they control “pots and amount of water” as mentioned, and since types of plants and amount of soil are also controlled as per the description of the experiment set - up, and options are a - types of plants, b - type of soil (assuming it's a mis - label and should be amount of soil as per context), c - amount of light (variable), d - A and B (if A is types of plants and B is amount of soil). So the constant variables are types of plants and amount of soil)